3V) GND to ground. In my case I use the ESP8266 NodeMCU 0. Master device sends. Learn how to establish a Wi-Fi communication (HTTP) between two ESP8266 NodeMCU boards to exchange data without the need to connect to the internet (you don’t need a router). Code for Transmitter Part i. The Arduino is an older design that is primarily a 5V device wherein 3. Products Serial(UART) Communication between Arduino Mega and NodeMCU ESP8266 using johnny five / Firmata js. Using NodeMCU ESP8266 with Arduino IDE The NodeMCU_ESP8266 can be used in various development platforms like the ESPlorer, LuaIDE, Arduino IDE etc. So I've decided to use NodeMCU. Plus, it is easy to extend. This project is all about serial communication between ESP8266-12(NODE-MCU) and Arduino. arduino ide is well maintained and has plenty libraries for all your projects, easy to use and less headbanging against the wall just for your information, arduino ide has gpio pins different then nodemcu on nodemcu for example header pins D1 & D2 are GPIO1 & GPIO2 but one arduino ide D1, & D2 are GPIO5 & GPIO4 and D7 the RX pin is GPIO13. The computer could be a PC, a Raspberry Pi, or any device that communicates with serial. Skills: Arduino, Microcontroller See more: need website game built, need social website built, need web site built, arduino serial communication protocol, arduino software serial, hardwareserial arduino, arduino serial monitor download, arduino serial read example, arduino hardware serial example, arduino. Project Python python quiz python tkinter Quiz Raspberry pi Raspberry Pi camera Raspberry pi Project Raspberry Pi Quiz Sensors serial communication smart. Code of ESP8266 for Serial communication between ESP8266 and Arduino - Serial_communication_of_ESP8266. In the loop, written '123' to the Serial. Just like in the previous post, UNO has …. After flashing, NodeMcu is going to run in AccessPoint mode. 1 Arduino Install the libraries on your Arduino. The default rate is 115,200 bps. Each Arduino board has at least one serial port. Internet of Things project - Communication between ESP8266 modules | ESP8266 Arduino Tutorial What people don't know is the real benefits of making two ESP8266 talk each other. It might be easier to get started with FTDI, but I started with Software serial using Arduino's Pin 10 and Pin 11. Then we will learn about the TCA9548A Multiplexer and how the master and slave sends and receives data using the I2C technology Then we will check out how we can program and use the multiplexer in our project using Arduino and NodeMCU Next, I will show you a quick demo using 8 I2C OLED displays and finally we'll finish the tutorial by discussing the advantages and disadvantages of the TCA9548A. Re: Serial communication between nodemcu and Arduino The serial port monitor of the Arduino IDE is not suitable for displaying binary values, it supports only format coded in ASCII, there are more powerful terminals available for download freeware, such as Realterm for example. There are several ways to connect objects such as Wi-Fi protocol. Asynchronous serial communication is widely used for byte oriented transmission. Read about 'Wireless serial connection between raspberry pi and NodeMCU (ESP8266) without internet' on element14. The last week I’ve been playing with Arduino-ESP8266 communication. In this project i built a serial communication between an ArduinoMega and a NodeMCU. (UART) to the NodeMCU. The main ingredient which makes communication between the Arduino and the c# software we will be building possible is the Serial communication protocol. At the end of this article we looked at an example to transfer a string from an Arduino Uno to a NodeMCU via UART. 45Ghz frequency band. I did some search work, and find the codes for the arduino uno. 4 Explaining the code - ARDUINO IDE. Once the code is loaded in your board, you will see the LED blinking and the LED state printed in the serial monitor. 1 Arduino Install the libraries on your Arduino. how to configure two Xbee modules to communicated with each other. Inter-integrated Circuit pronounced I-squared-C (I²C) or I2C is a 'short distance', 'two wire bus technology' (well actually 4 wires because you also need the VCC and Ground) that is used for 'serial communication' between multiple processors and sensors. With the theory out of the way, we can now begin by integrating the NodeMCU board in the Arduino IDE, to program it. So if you are going with this method, you may connect the Tx pin of GSM module to Rx pin of Arduino and Rx pin of GSM module to Tx pin of Arduino. It was intentionally written to allow communication between Arduino and Excel. Power up the board and open the serial monitor from arduino IDE Serial Communication Between Nod eMCU and Arduino. The temperature and humidity data sent by the transmitter will be received via the Ra-02 module and displayed on the Arduino IDE's Serial Monitor. Then starting the server. It now determines what the serial port number is by finding the difference between the initial serial ports and the new set of serial ports. The default rate is 115,200 bps. Remember nmRX-hcTX and nmTX-hcRX crisscross connection between NodeMCU and HC05. So the Nodemcu will communicate serially with Arduino Uno through pin2 and pin3. Its obvious advantage over the Arduino or PIC is that it can readily connect to the Internet via WiFi. I did some search work, and find the codes for the arduino uno. Joba Tsl2561 Library: IoT library for using the Tsl2561 luminosity sensor: Joystick: Allows Arduino/Genuino boards to simplify the use of the Joystick. Information is passed back & forth between the computer and Arduino by, essentially, setting a pin high or low. Then ds18b20 sensors on 1-wire bus are commanded to start the operations. Serial Communication Between Arduino & Nodemcu Arduino. The configura. These are: UART. Just like in the previous post, UNO has …. What is the ESP8266? ESP8266 is the name of an infamous WiFi module that is a system on a chip (SoC) developed by Espressif Systems, a company based in Shanghai. 4-20mA current loop is most common and widely used communication method in an industrial environment. NodeMCU will be dealt with by reference, and ESP8266 will be referenced in the same way. Serial communication is required when you want to transfer any sort of data from one Arduino to NodeMCU or NodeMCU to Arduino. Learn about Serial communication between NodeMCU and Arduino. My main aim is to transfer data back and forth between an Arduino UNO and an ESP8266 NodeMCU using Serial or an alternative method. Earlier, I shared a video which does the vice-versa, i. Bluetooth y arduino en comunicación serial by TutosIngenieria. Buy the Arduino from: Banggood | Amazon. Question: How Can Make Serial Communication Between Arduino Uno And Wifi Nodemcu To Send Information To Blynk Application Using Multiple Analog Sensor And Arduino Program ????and Step For Connection Wire And How To Upload Program To Communicate ????i Need Example. BeginnerShowcase (no instructions)2 hours47,393. The Beaglebone Black and Raspberry Pi also contain serial communication hardware. Re: Serial communication between nodemcu and Arduino The serial port monitor of the Arduino IDE is not suitable for displaying binary values, it supports only format coded in ASCII, there are more powerful terminals available for download freeware, such as Realterm for example. println("IP address: "); // Print IP address Serial. for Arduino Uno: Complete Arduino code is given at the end of this tutorial. NodeMCU is an open source IoT platform. In Example 1 Arduino Mega Having 4 Uart And Arduino Uno Having One Uart But We Need Two Uart in Arduino Uno So We need to Created Virtual Uart So See in Serial Port Moniter What data is Received. Multiple GPIO pins on the board allow you to connect the board with other peripherals and are capable of generating PWM, I2C, SPI, and UART serial communications. " For example, a serial killer doesn't stop with one murder, but stabs many people one after the other. So you should use a level shifter to connect arduino soft serial pins to the nodemcu uart port (It also works without level converter , but it is not recomended). Connect the OLED SDA SCL pins to D2, D1 of Nodemcu respectively. [Fully Explained]--Multiple Data--Serial Communication between Arduino and NodeMCU (ESP8266) --Single Data--Serial Communication between Arduino and NodeMCU (ESP8266) by Mybtechprojects tech. either to the computer via the cable or to the Tx Rx of ESP8266. Comparing it to the HC-06 module, which can only be set as a Slave, the HC-05 can be set as Master as well which enables making a communication between two separate Arduino Boards. In Setup, SoftwareSerial is started at 9600 Baud. You’re going to need two Arduino’s for this tutorial. Learn about Serial communication between NodeMCU and Arduino. Having Arduino-Arduino communication can be useful for many projects, such as having one Arduino to run motors and having another sense the surroundings and then relay commands to the other Arduino. to control a cables patch using a sensor, in cables. Coding in the Arduino language will control your circuit. Connect 7 to 8 and 8 to 7 but you need a level converter (3. Serial-to-WiFi Tutorial using ESP8266. The tests on the ESP32 were performed using a DFRobot’s ESP-WROOM-32 device integrated in a ESP32 FireBeetle board. A sketch in Arduino IDE always has two main functions: setup and loop. Posted: (1 days ago) Introduction to WebSocket. As you can see the diagram on the ESP8266 client the push button is attach to pin D2 map on Arduino as GPIO pin 4 when button is pressed it will send a command to the server as value of 1 then the server will turn the D2/GPIO 4 to HIGH then LED light will turn on. Serial Communication Between Arduino and ESP-01: In This Tutorial we will see the Serial Communication Between the Arduino and ESP-01. The device itself was less than $10 (I got a few on AliExpress for $5) and it meant that smart microcontrollers could be easily made into "Internet of Things" devices. Now we're ready to see if we can magically (or through code) detect the 'Hello, world!' string we're sending from Processing. Here we don't necessarily need MQTT. I asked the Arduino subreddit but I also wanted to ask you guys to see if you had any ideas. You could also just use a trimpot as a voltage divider. Comparing it to the HC-06 module, which can only be set as a Slave, the HC-05 can be set as Master as well which enables making a communication between two separate Arduino Boards. At first I used them (in my previous POI hunter project) as a smarter Arduino, because they have higher clock frequency, more memory and built in "SD card. In this paper we play with three types of serial communication: standard TX-RX, Soft Serial and I2C. Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware. Let’s write Arduino sketch for NodeMCU as I2C master device and Arduino sketch for Arduino Uno as I2C slave device. This Video demonstrate the serial communication between Arduino and ESP8266-12E(NODE MCU). By using our site, you acknowledge that you have read and understand our Cookie Policy, Cookie Policy,. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The Arduino IDE (described in Recipe 1. Use of ESP8266 as just a Serial-to-WiFi bridge with arduino is most common mistake newbies do. In my case it’s COM3. Servo started off switching between 0 and 180 every 3 seconds, as intended. There are several ways to connect objects such as Wi-Fi protocol. Earlier, I shared a video which does the vice-versa, i. This is normally the case if you program the Arduino with the IDE, as you can then send and receive input over the serial port to interact with your creation. The HC-05 module is a Bluetooth SPP (Serial port protocol) module which means that it communicates with Arduino serially. Q&A for Work. I would like to establish one way uart serial communication between an Arduino 5V and an ESP32 3. A Serial Peripheral Interface (SPI) bus is a system for serial communication, which uses up to four conductors, commonly three. I am trying to use a nodemuc in the slave mode to do the SPI communication with a arduino uno (master mode). You can view my previous instructable to know about how to use nodemcu using arduino ide. Apart from serial communication the Nano board also support I2C and SPI communication. 2 Schematics4. In the previous tutorials we have learned about I2C communication protocol and SPI Communication protocols in Arduino. Serial-to-WiFi Tutorial using ESP8266. Arduino connects over it with NodeMCU, obtains time, date, weather and displays it. So you need to dial the ESP8266 settings to move the communication speed to a more manageable BAUD of 9600 ; Arduino IO pins have 5V and ESP8266 accepts 3. Code for Receiver Arduino. This paper presents different service models for communication in Internet of Things(IoT). I asked the Arduino subreddit but I also wanted to ask you guys to see if you had any ideas. Arduino IDE Installation: Arduino IDE is an Integrated Development Environment where all the required process (libraries, Compiling, Loading code to the device) can be completed…. These functions are normally activated by the corresponding (ESP-12ED, NodeMCU 1. a NodeMCU with the Arduino program that we created earlier uploaded to it. Recently, I have been exploring solutions to overcome NodeMCU GPIO pin limitations. Serial Monitor in Arduino IDE After you have successfully uploaded the sketch to the NodeMCU, you should start receiving similar values as there are above. Some boards like the NodeMCU have an on-board resistive voltage divider, to get an easier 0 - 3. Serial communication occurs on digital pins 0 (RX) and 1 (TX) as well as via USB. The Arduino is an older design that is primarily a 5V device wherein 3. The microcontroller on the Arduino board has a hardware serial port built-in, so that after the port has been initialized by software, a byte sent to the port will be sent out serially by the hardware. Getting Arduino UNO Ready for Programming ESP8266. At the end of this article we looked at an example to transfer a string from an Arduino Uno to a NodeMCU via UART. After connecting Arduino with it, upload the above code in Arduino, Arduino start receiving whatever zigbee send to Arduino through serial communication. Example Project with NodeMCU. After we found out the HEX address of the I2C LCD display, we will control the display accordingly to send messages from the Arduino or NodeMCU via I2C to the LCD display. Q&A for Work. Serial Monitor in Arduino IDE After you have successfully uploaded the sketch to the NodeMCU, you should start receiving similar values as there are above. Step 3: We wil be using the adafruit library about their fingerprint sensors. Each Arduino board has at least one serial port. If not please follow this tutorial first. Communication with an Arduino via Serial. The NodeMCU supports all three of the main serial communication protocols found on the Arduino (and a range of other MCU-equipped devices). Setting Arduino to recognize and communicate with the ESP266 NodeMcu is similar with the procedure of installing ESP8266-01. Read on for the two steps that have to be done only once. Open-source, Interactive, Programmable, Low cost, Simple, Smart, WI-FI enabled. Serial Communication between two Arduino UNO Board is given in this article. pinMode is a function which takes two arguments as the input. Open a new sketch File by clicking New. This can be done through a some ways. Inter-integrated Circuit pronounced I-squared-C (I²C) or I2C is a 'short distance', 'two-wire bus technology' (well actually 4 wires because you also need the VCC and Ground) that is used for 'serial communication' between multiple processors and sensors. Now there is another serial communication protocol called RS-485. The Arduino is an older design that is primarily a 5V device wherein 3. Used for communication between the Arduino board and a computer or other devices. The begin method receives as input the baud rate in bits per second [1]. The application (performing the role of a server) is checking inside the loop() for an UDP packet to arrive. com 2018 Master Board creates Access Point */ #include #include const char *ssid. PZEM-004T module is very easy to use in programming using various types of microcontroller boards such as Arduino, ESP8266, STM32, WeMos, NodeMCU, Raspberry Pi etc. In the previous tutorials we have learned about I2C communication protocol and SPI Communication protocols in Arduino. If you want to know more about the I2C technology please check out my 'Tutorial Number 09'. Serial communication is required when you want to transfer sensor data or any data from one device to another device, In our case it is ESP8266 NodeMCU and Arduino. Once the code is uploaded, open the Serial Monitor of Arduino. Copy and paste the VirtualWire. In this example, we are sending “Hello Slave” string with ‘ ’ as ending of string from NodeMCU Master device. This paper focussed on the execution of Arduino, NodeMcu and MQTT protocol and also describe. I think you are doing the same thing on NodeMCU,. Now we're ready to see if we can magically (or through code) detect the 'Hello, world!' string we're sending from Processing. Now since we have our board. At first I used them (in my previous POI hunter project) as a smarter Arduino, because they have higher clock frequency, more memory and built in "SD card. The Beaglebone Black and Raspberry Pi also contain serial communication hardware. The Arduino code for this tutorial is very simple. for 5 volt at Arduino i get only 4 volt at Nodemcu. For everything else use Serial. RBL_nRF8001: An Arduino library for the nRF8001 products such as the BLE Shield and Blend. [Fully Explained]--Multiple Data--Serial Communication between Arduino and NodeMCU (ESP8266) How to make SoftwareSerial Communication between Arduino Uno and NodeMCU by RedTron. In this project, we will show how to connect multiple I 2 C devices to an arduino microcontroller. Then starting the server. Let's write Arduino sketch for NodeMCU as I2C master device and Arduino sketch for Arduino Uno as I2C slave device. Esp8266 Mesh Mqtt. Learn about Serial communication between NodeMCU and Arduino. The Beaglebone Black and Raspberry Pi also contain serial communication hardware. BeginnerShowcase (no instructions)2 hours47,393. The Arduino code for this tutorial is very simple. Open-source, Interactive, Programmable, Low cost, Simple, Smart, WI-FI enabled. It was intentionally written to allow communication between Arduino and Excel. Try sending some text and the same data will be echoed back! You Should Now Be Able to Communicate with Your Arduino Through Android! This article has helped to show how an Arduino can talk to your smartphone. The Arduino code. OTA is used to reprogram the node devices etc. Arduino does not support Internet connectivity and it definitely does not have enough resources to process incoming data. Serial Communication between ESP2866-12 (NODE-MCU) and Arduino to increase the number of analog pins as my primary work. You can use the same code for for Arduino Uno but for Arduino Mega use the NodeMCU code but change the serial pins in NodeMCU code. The Raspberry Pi and Arduino can compliment each other. Follow this simple guide and we will show you a few tips to make it fast and easy. This will be used for debugging purposes. AC mains appliances (Bulbs) will be connected to relays which are controlled by the ESP8266. To do that, simply connect the LEDs to GPIO pins on the NodeMCU and add code to control these LEDs in the NodeMCU Code, just where the NodeMCU sends the Serial message to the Arduino Uno. UART, or Universal Asynchronous Receiver/Transmitter, is a form of serial communication that relies on just one wire going in either direction. Then, the server and the client will exchange data (sensor. User has to install and configure the Blynk App as per the above instructions. It is also a simple, yet effective method of communication and is easy to learn and master for beginners. With a NodeMCU there is no voltage mismatch between devices because the ESP8266 family, including the Lolin NodeMCU, is designed as 3. Open a new sketch File by clicking New. If a device is an SPI device, this means that the device is made or hardwired to be communicate via SPI. Serial communication requires two pins of the microcontroller board. The serial port for programming the Arduino mentioned above is a hardware serial port. Build Circuit as shown in the image. Web Server with NodeMCU WebSocket | Microcontroller Tutorials. 20-ene-2019 - This tutorial is about inter communication between 2 esp8266 WiFi modules. begin(9600); // activates the serial communication at baud rate of 9600. In the previous tutorials we have learned about I2C communication protocol and SPI Communication protocols in Arduino. Recently, I have been exploring solutions to overcome NodeMCU GPIO pin limitations. This video talks about serial communication between Arduino UNO and ESP-01 where Arduino UNO is a sender and ESP-01 is a receiver. 3V) GND to ground. Note that the Serial object is of class HardwareSerial. A2 pin of Arduino – Second pin of the potentiometer; VCC of Arduino – third pin of the potentiometer. The circuit diagram for RF receiver using Arduino Nano is shown below. NodeMCU will be dealt with by reference, and ESP8266 will be referenced in the same way. Contents: Arduino IDE Installation Arduino IDE and ESP8266 with NodeMCU Blinking LED with Arduino DHT11(Temperature and Humidity Sensor) MQTT Using MQTT Protocol and Adafruit Broker to publish DHT11 Data. Arduino Mega sends data packages (serialized with Json) to NodeMcu. [Fully Explained]--Multiple Data--Serial Communication between Arduino and NodeMCU (ESP8266) --Single Data--Serial Communication between Arduino and NodeMCU (ESP8266) by Mybtechprojects tech. This example shows how to generate a JSON document with the ArduinoJson library. The uses for this are endless! In case data. These are two codes for Serial communication between NodeMCU and Arduino board. Serial Communication between NodeMCU and Arduino. Recently, I have been exploring solutions to overcome NodeMCU GPIO pin limitations. So if you are going with this method, you may connect the Tx pin of GSM module to Rx pin of Arduino and Rx pin of GSM module to Tx pin of Arduino. Serial Communication Between Arduino & Nodemcu Arduino. When working with ESP32 WiFi/Bluetooth MCU under Arduino SDK for ESP32, you will notice that Serial work just fine. I have a routine that does use serial. NodeMCU vs Arduino Uno - choosing a Development Board The NodeMCU v1. The ESP8266 has two hardware UARTS (Serial ports):. The firmware can be programmed using the Arduino IDE. Arduino Serial Monitor screen. It also supports many programming. What is the ESP8266? ESP8266 is the name of an infamous WiFi module that is a system on a chip (SoC) developed by Espressif Systems, a company based in Shanghai. In this blog we connect Arduino UNO with ESP32. In the setup function first the arduino serial monitor communication channel is initialed at 115200 baud rate. The Nod Stack Overflow. Read on for the two steps that have to be done only once. pada kesempatan kali ini saya akan menuliskan tutorial sederhana tentang Arduino, ESP8266 Komunikasi Serial dengan Nodemcu atau Wemos. For the receiver, we will use an ESP8266 Nodemcu development board with another Ra-02 LoRa Module. It comes with CP2102 USB serial programmer which is better than CH340 USB serial programmer present in some older versions & Lolin Board. [Fully Explained]--Single Data--Serial Communication between Arduino and NodeMCU (ESP8266) Arduino Tutorial / # 13 (Serial Communication between NodeMCU and Arduino) by RZK Technology. At the end of this tutorial, you will be able to monitor multiple analog sensors and you will also be able to control multiple loads. So you need to dial the ESP8266 settings to move the communication speed to a more manageable BAUD of 9600 ; Arduino IO pins have 5V and ESP8266 accepts 3. In certain cases we need to use more than one Serial port in the case of arduino, I use the arduino mega 2560 which has 4 serial ports including the programming port, in the case of arduino's as the nano has a single programming port and as a solution Have created the softwareserial library, given the incompatibility of certain functions the softwareserial library for arduino does not work. To get serial and IOs expantion like Arduino you can use Difference between ESP12, ESP01 and NodeMCU is only of Flash memory and Number of IOs are If you don't, network communication won't work as expected, and if it's longer than 3 seconds. I'm trying to read voltage value using Analog pin A0 in arduino uno and transmit the read voltage to Nodemcu but not getting same voltage at NodeMcu as on Arduino side for Ex. 2 module 115200 baud rate. When i press reset for 3 seconds, it works "sometimes" I use arduino 1. write(0); I forgot to start the transmission with: Wire. Arduino Software Serial Library is used for carrying out a serial communication between the board and the computer. from: the index to start the substring at. Contents1 Print Hello World in Serial terminal2 Print data in the Serial from user input3 Analog Read Serial3. I will explain the method and code of inter communication between two esp8266 modules. The default setup for the uart is controlled by build-time settings. A2 pin of Arduino – Second pin of the potentiometer; VCC of Arduino – third pin of the potentiometer. This Interfacing useful while you want to add more than one analog sensor , because ESP8266-1E or NODE. It is also a simple, yet effective method of communication and is easy to learn and master for beginners. Introduction: While developing an application using an Node MCU sometimes the developer is required to look in to the execution of code while the code is being executed. Inter-integrated Circuit pronounced I-squared-C (I²C) or I2C is a 'short distance', 'two wire bus technology' (well actually 4 wires because you also need the VCC and Ground) that is used for 'serial communication' between multiple processors and sensors. So, do tests before using any GPIO for I2C applications. On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Let’s write Arduino sketch for NodeMCU as I2C master device and Arduino sketch for Arduino Uno as I2C slave device. Lets start by connecting the IC to an Arduino. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In this tutorial, you'll learn how to establish a wireless connection between two Arduino boards and create a network using the NRF24L01 module. Follow these instructions. Recently, I have been exploring solutions to overcome NodeMCU GPIO pin limitations. Reading 4-20mA current loop sensors using Arduino is much easier than you might think. Serial communication is required when you want to transfer any sort of data from one Arduino to NodeMCU or NodeMCU to Arduino. You’re also going to need to 2 Arduino CAN Bus Modules. (UART) to the NodeMCU. In this tutorial we only care about using How to use multiple Serial port on Arduino ESP32 to print the debug information to Terminal. Having Arduino-Arduino communication can be useful for many projects, such as having one Arduino to run motors and having another sense the surroundings and then relay commands to the other Arduino. pinMode is a function which takes two arguments as the input. We have already seen how to connect arduino uno to NodeMCU (ESP8266) here. Introduction It is possible to chain Arduinos together in such a way as to get communication between the two. 4 Explaining the code - ARDUINO IDE. In the loop, written '123' to the Serial. Between Arduino & LM393 : Arduino 5V- LM393 VCC Arduino GND - LM393 GND Arduino A0 - LM393 A0 ( analog pins) Between LM393 & Soil Moisture Sensor : LM393( +) - Soil Moisture Sensor( +) LM393 (-) - Soil Moisture (-) Betweeen NodeMcu & Arduino : NodeMcu Gnd - Arduino Gnd NodeMcu TX - Arduino Rx NodeMcu RX - Arduino TX. In this blog we connect Arduino UNO with ESP32. To get serial and IOs expantion like Arduino you can use Difference between ESP12, ESP01 and NodeMCU is only of Flash memory and Number of IOs are If you don't, network communication won't work as expected, and if it's longer than 3 seconds. Similarly connect the Lora SX1278 & NodeMCU ESP8266 same as above. In this tutorial we will learn how to make serial communication between Arduino to ESP8266 & ESP8266 to Arduino. Earlier, I shared a video which does the vice-versa, i. Now there is another serial communication protocol called RS-485. January 1, 2018 ESP8266 esp to esp communication, ESP8266 Manoj R. Arduino IDE – Example results. Code of ESP8266 for Serial communication between ESP8266 and Arduino - Serial_communication_of_ESP8266. The application (performing the role of a server) is checking inside the loop() for an UDP packet to arrive. The uses for this are endless! In case data. The idea is to have the ESP handle all the network communications like connecting to WiFi and then ultimately connect to my MySQL server to store data comming from the sensors and stuff haning on the Arduino. Over the years, it developed a reputation of being a robust and reliable platform for DIY projects, and occasionally, for use in products. It is designed to replace cable connections. Open the Serial monitor, which looks like a magnifying glass at the top right section of the Arduino IDE. I'm using two drivers JYQD_V7. To know more visit this post --->. [Fully Explained]--Multiple Data--Serial Communication between Arduino and NodeMCU (ESP8266) --Single Data--Serial Communication between Arduino and NodeMCU (ESP8266) by Mybtechprojects tech. Power off HC05 and Unpair it if it's already Bluetooth paired to some phone or device) Connect NodeMCU to computer and load the program below using Arduino IDE ; Open Arduino IDE Serial Monitor. China Hc-Sr505 Mini Infrared PIR Motion Sensor Precise Infrared Detector Module for Uno R3, Find details about China Arduino Module, Sensor Module from Hc-Sr505 Mini Infrared PIR Motion Sensor Precise Infrared Detector Module for Uno R3 - Fut-electronic Tech Co. In the function the initializes the serial communication between your PC and the NodeMCU at a baud rate of 9600 bits per second, and the initializes the communication between NodeMCU and Blynk. Communication with an Arduino via Serial. Re: Serial communication between nodemcu and Arduino The serial port monitor of the Arduino IDE is not suitable for displaying binary values, it supports only format coded in ASCII, there are more powerful terminals available for download freeware, such as Realterm for example. The I 2 C bus is a bus which enables high-speed two-way communication between devices while using a minimal number of I/O pins to facilitate communication. pinMode is a function which takes two arguments as the input. So that i used Bluetooth technology. ESP8266 NRF24L01 Wifi Gateway with Arduino NRF24L01 Node. The Tx Rx pair of Arduino can be connected to one pair of other device i. Q&A for Work. A video tutorial to follow, Hope it helps. The NodeMCU is a development board featuring the popular ESP8266 WiFi chip. Getting Arduino UNO Ready for Programming ESP8266. You can view my previous instructable to know about how to use nodemcu using arduino ide. It has got following pin interface. Now we're ready to see if we can magically (or through code) detect the 'Hello, world!' string we're sending from Processing. The main advantage of RS-485 is the long distance data transfer between two devices. The word serial means "one after the other. NodeMCU has I2C functionality support on its GPIO pins. The following pictures show the connection between Arduino Uno on the left side and NodeMCU on the right side with the I2C LCD display. In this tutorial we first compared the UART communication protocol against I2C and SPI. It is also a simple, yet effective method of communication and is easy to learn and master for beginners. communication need to. a NodeMCU board now we can move on to communication between the. When connecting UNO with nodemcu we used Lua to program the ESp8266 device, here we will use arduino IDE to program both UNO and ESP32. The Arduino code. Serial communication is required when you want to transfer sensor data or any data from one device to another device, In our case it is ESP8266 NodeMCU and Arduino. I decided to teach IOT with Firebase through problem solving. Working and Programming Explanation: Arduino Uno Part: First let's program the UNO, Connect the UNO to the PC first and then write the program (Check Code section below) in the Arduino IDE software and upload the program to the UNO. 3V) GND to ground. Comparing it to the HC-06 module, which can only be set as a Slave, the HC-05 can be set as Master as well which enables making a communication between two separate Arduino Boards. At first I used them (in my previous POI hunter project) as a smarter Arduino, because they have higher clock frequency, more memory and built in "SD card. Serial communication is required when you want to transfer sensor data or any data from one device to another device, In our case it is ESP8266 NodeMCU and Arduino. io or your own server. JPEGDecoder: Jpeg decoder tested with Arduino Mega, Arduino Due and ESP8266 based NodeMCU 1. Earlier, I shared a video which does the vice-versa, i. Code for Sender NodeMCU. In NodeMCU we shall make pin 5 as Tx and pin 6 as Rx. I recommend using the ESPlorer IDE which is a program created by 4refr0nt to create and save Lua files into your ESP8266. Serial communication occurs on digital pins 0 (RX) and 1 (TX) as well as via USB. With few Lua scripts I was able to implement simple API that is accessible over serial port. So when it will be 0 then our nodemcu will be in programming mode and if it is 1 then it will be in OTA mode. Serial communication is used to exchange data between the Arduino board and another serial device such as computers, displays, sensors and more. 1 Arduino Install the libraries on your Arduino. Installation and Running. When i press reset for 3 seconds, it works "sometimes" I use arduino 1. We will create a simple program to parse a JSON string simulating data from a sensor and print it to the serial port. Using the programable port( 0 and 1) COMMANDS: Serial. Arduino Nodemcu two way communication - In this Tutorial, you will learn how to do two way communication between Arduino and blynk through Nodemcu esp8266 wifi module. So interfaced Arduino Uno with ESP8266 and powered ESP8266 with External adapter with 3. RBL_nRF8001: An Arduino library for the nRF8001 products such as the BLE Shield and Blend. Arduino Example. The sketch basically stops the Atmel chip to interfere the communication between FTDI chip and your other device. ESP32 has 3 hardware UARTs that can be mapped to almost any pin. Arduino board will generate random numbers between 0 and 100 and pass the values via UART / serial pins of generic ESP8266. You can have communication between multiple ESPs at the same time. The Wire Library inside the Arduino Software is accessed to use the I2C bus. So data sent by Arduino will be received by the NodeMCU and vice versa. In this tutorial we focus only on GPIO pins of ESP8266 and How to use efficiently. I asked the Arduino subreddit but I also wanted to ask you guys to see if you had any ideas. As we know ESP-12 have one analog pin where we can connect our analog sensor, But what else if we need more than one analog pin to connect more analog sensor and again if you want to send data to server like adafruit. Arduino Specific Libraries: - IgniteIotLibs (Copy under "Arduino/libraries/" directory) - Esp8266 Sketch Data Upload Plugin. You can perform it on NodeMCU and Arduino Board. begin () function. This paper presents different service models for communication in Internet of Things(IoT). A Serial Peripheral Interface (SPI) bus is a system for serial communication, which uses up to four conductors, commonly three. You’re going to set one ESP8266 as an Access Point (Server) and another ESP8266 as a Station (Client). All Arduino boards have at least one serial port (also known as a UART or USART), and some have several. You can also send data from the Serial Monitor to Arduino by entering text in the text box to the left of the Send button. Question: How Can Make Serial Communication Between Arduino Uno And Wifi Nodemcu To Send Information To Blynk Application Using Multiple Analog Sensor And Arduino Program ????and Step For Connection Wire And How To Upload Program To Communicate ????i Need Example. 0) also break out pins 9 and 11. ino name, and flash it to NodeMcu. Learn about Serial communication between NodeMCU and Arduino. You can have communication between multiple ESPs at the same time. How to Connect Multiple I 2 C devices to an Arduino Microcontroller. Today, IOT applications are on the rise, and connecting objects are getting more and more important. This is important because our variable will be subscribed through the API Label and it allows the communication between Ubidots and the NodeMcu. Then, the server and the client will exchange data (sensor. · Serial communication uses single data line making it much cheaper · enables two computers in different cities to communicate over the telephone · Byte of data must be converted to serial bits using a parallel-in-serial-out shift register and transmitted over a single data line. With few Lua scripts I was able to implement simple API that is accessible over serial port. how to send data arduino to ms excel, PLX DAQ v2 is a program used to establish an easy communication between Microsoft Excel on a Windows Computer and any device that supports serial port protocol. A voltage divider circuit was set up between the RXD pin of the HC-06 and the Tx pin on the arduino so that the voltage used for the serial communication is 3. dimana keduanya antara Arduino dan modul ESP8266 seperti nodemcu atau wemos akan saling mengirim data atau menerima data, untuk menghubungkan keduanya saya menggunakan komunikasi serial. WiFi module is industrial-grade chips ESP8266, which is ESP-12E with metal shield, strong anti-interference ability;. For proper functioning the GND pins of both Arduinos need to be connected. But Serial1 and Serial2 do not. It has got following pin interface. Hello sahabat Anak kendali. Here NodeMCU is acting as master device and we are using Arduino uno as slave device. The ESP8266 Wi-Fi chip is very low cost and can be directly connected with the Arduino board to establish communication with the real cloud. When a valid packet is received, an acknowledge packet is sent back to the client to the same port it has been sent out. A button is connected to initialize the serial communication and LED (blink) to indicate that data is being sent. Code for Sender NodeMCU. RS485 Serial Communication Between Arduino Mega and Arduino Nano With Visuino Arduino Nano and Visuino: 7 Segment Display Clock With MAX7219 and DS1307 Real Time Clock(RTC) Arduino Nano: Accelerometer Gyroscope Compass MPU9250 I2C Sensor With Visuino. It supports JSON serialization, JSON deserialization, MessagePack, streams, and fixed memory allocation. Between Arduino & LM393 : Arduino 5V- LM393 VCC Arduino GND - LM393 GND Arduino A0 - LM393 A0 ( analog pins) Between LM393 & Soil Moisture Sensor : LM393( +) - Soil Moisture Sensor( +) LM393 (-) - Soil Moisture (-) Betweeen NodeMcu & Arduino : NodeMcu Gnd - Arduino Gnd NodeMcu TX - Arduino Rx NodeMcu RX - Arduino TX. This video talks about serial communication between Arduino UNO and ESP-01 where Arduino UNO is a sender and ESP-01 is a receiver. How Software Serial read and write works. On Arduino side, we will take sample periodically and send a JSON message over softserial to nodemcu. In this tutorial, you will learn how to use NodeMCU on Arduino IDE. OTA is used to reprogram the node devices etc. Open the Arduino IDE software on your computer. The last week I've been playing with Arduino-ESP8266 communication. Access Point ESP Program. SPI is a full duplex master-slave communication protocol. Each arduino board has at least one serial port and is at digital pins 0 and 1 (Tx and Rx respectively). 1- UART UART is a serial communication protocol, used widely to connect microcontrollers and embedded devices together, all it needs just 2 wires (Receive / Transmit) and about 5 lines in code in case of ardu. In this tutorial we focus only on GPIO pins of ESP8266 and How to use efficiently. So interfaced Arduino Uno with ESP8266 and powered ESP8266 with External adapter with 3. I'm using two drivers JYQD_V7. For everything else use Serial. The other library is NTPClient , this library connects the ESP8266 WiFi to a time server, this server sends time information to the module. The serial wifi shield has the following features: 1. But, Serial1 and Serial2 will not work. Arduino Software Serial Library is used for carrying out a serial communication between the board and the computer. A button is connected to initialize the serial communication and LED (blink) to indicate that data is being sent. Download and Install the Serial Driver To program the NodeMCU V1. Contents1 Print Hello World in Serial terminal2 Print data in the Serial from user input3 Analog Read Serial3. begin(9600) Serial. Also, I used another library named SoftwareSerial (SoftwareSerial. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. ino), the Arduino IDE will not scan and modify. For an Arduino board connect: VIN to 5V (or 3. You’re also going to need to 2 Arduino CAN Bus Modules. ESP32 has 3 hardware UARTs that can be mapped to almost any pin. Over the years, it developed a reputation of being a robust and reliable platform for DIY projects, and occasionally, for use in products. This arrangement introduces you to Serial Communication between the NodeMCU and the Arduino Uno. Introduction: While developing an application using an Node MCU sometimes the developer is required to look in to the execution of code while the code is being executed. If you want to know more about the I2C technology please check out my 'Tutorial Number 09'. Recently, I have been exploring solutions to overcome NodeMCU GPIO pin limitations. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Now I want the same values to be sent to the NodeMCU by I2C communication and want to read them on the serial monitor of the NodeMCU. 1 The NodeMCU should serve up a web page showing current status of LEDs and two buttons to control them. I'm making a project wherein I wanted to make the two devices communicate (Arduino Mega and NodeMCU respectively) which the Arduino Mega can send data via serial comm. Your Arduino sketch should now look something like this: All that's left to do is to plug in your Arduino board, select your board type (under Tools -> Board Type) and your Serial port (under Tools -> Serial Port) and hit the 'upload. Description: Nodemcu with Arduino- In this tutorial, you will learn how to do Serial communication between Arduino and Nodemcu esp8266 wifi module. begin(9600); // activates the serial communication at baud rate of 9600. This project is all about serial communication between ESP8266-12(NODE-MCU) and Arduino. The hardware set up should be according to the circuit diagram. However, both the functionality can not be used simultaneously. The default setup only requires calling the Serial. [Fully Explained]--Single Data--Serial Communication between Arduino and NodeMCU (ESP8266) Arduino Tutorial / # 13 (Serial Communication between NodeMCU and Arduino) by RZK Technology. There are two ways of connecting GSM module to arduino. Here NodeMCU is acting as master device and we are using Arduino uno as slave device. As nodemcu has only 1 analog pin,i am using Arduino to input analog data of 5 potentiometer and want to send it to nodemcu via serial communication. I asked the Arduino subreddit but I also wanted to ask you guys to see if you had any ideas. Follow this simple guide and we will show you a few tips to make it fast and easy. Multiple GPIO pins on the board allow you to connect the board with other peripherals and are capable of generating PWM, I2C, SPI, and UART serial communications. Working of WiFi Controlled LED using ESP8266 and Arduino Project. Connecting two Arduino boards to create a wireless connection. Skills: Arduino, Microcontroller See more: need website game built, need social website built, need web site built, arduino serial communication protocol, arduino software serial, hardwareserial arduino, arduino serial monitor download, arduino serial read example, arduino hardware serial example, arduino. I was working on a cool embedded project in which a wireless communication is required between two motors placed a part on a small distance, also the status o…. MQTT Communication Between NodeMCU and Raspberry Pi 3 B+. Buy the Arduino from: Banggood | Amazon. Communication with an Arduino via Serial. The ESP8266 has two hardware UARTS (Serial ports):. The NodeMCU/ESP8266 community took the IDE selection a step further by creating an Arduino add-on. Serial Communication between NodeMCU and Arduino. It comes with CP2102 USB serial programmer which is better than CH340 USB serial programmer present in some older versions & Lolin Board. Connect the OLED SDA SCL pins to D2, D1 of Nodemcu respectively. You’re going to set one ESP8266 as an Access Point (Server) and another ESP8266 as a Station (Client). This article explains how to use the HC-05 Bluetooth Module with Arduino. for Arduino Uno: Complete Arduino code is given at the end of this tutorial. The serial wifi shield has the following features: 1. I have put the following code on the NODEMCU. You could also just use a trimpot as a voltage divider. The Serial library helps establish communication between your computer and the Arduino board. Arduino Nodemcu two way communication - In this Tutorial, you will learn how to do two way communication between Arduino and blynk through Nodemcu esp8266 wifi module. 0 UART Transceiver Serial Module, used by the U. It also supports many programming. Reliability of communication. In the loop, written '123' to the Serial. The goal is to make IoT programming easier. Nice description of use serial communication to Arduino W Hobbies Spring Tx Refferal: 8772235708 Hobbies For 7 Year Olds. Comparing it to the HC-06 module, which can only be set as a Slave, the HC-05 can be set as Master as well which enables making a communication between two separate Arduino Boards. This paper presents different service models for communication in Internet of Things(IoT). Power off HC05 and Unpair it if it's already Bluetooth paired to some phone or device) Connect NodeMCU to computer and load the program below using Arduino IDE ; Open Arduino IDE Serial Monitor. 1- UART UART is a serial communication protocol, used widely to connect microcontrollers and embedded devices together, all it needs just 2 wires (Receive / Transmit) and about 5 lines in code in case of ardu. ESP32 has 3 hardware UARTs that can be mapped to almost any pin. I just displayed the text on the 16X2 LCD display. I am trying to connect a nodeMCU to arduino mega using serial communication so that i can read data from firebase. Inter-integrated Circuit pronounced I-squared-C (I²C) or I2C is a 'short distance', 'two wire bus technology' (well actually 4 wires because you also need the VCC and Ground) that is used for 'serial communication' between multiple processors and sensors. The ESP8266 Wi-Fi chip is very low cost and can be directly connected with the Arduino board to establish communication with the real cloud. Newbie; Posts: 2; Karma: 0. Please note that. Create a DHT object. I’m using ‘Python 2. Apart from serial communication the Nano board also support I2C and SPI communication. Connecting anything to these pins can interfere with that. Once the script is uploaded you can view the output on the Serial Monitor. The Arduino does not have the overhead of running a full operating system so is particularly good at realtime communications, whereas the Raspberry Pi has the advantage of a full operating system and network connectivity (Raspberry Pi 3 or using a WiFi USB dongle). The hardware set up should be according to the circuit diagram. Since it uses the AVR mcu, the code below can't be compiled for the nodemcu:. You can use Bluetooth module simply for a serial port replacement to establish connection between MCU, PC to your embedded project and etc. A video tutorial to follow, Hope it helps. However, both the functionality can not be used simultaneously. The Arduino code. Read about 'Wireless serial connection between raspberry pi and NodeMCU (ESP8266) without internet' on element14. Managing Libraries. So, we have to write code for both Arduino and NodeMCU for transmitting and receiving. If you do not have a dedicated USB to Serial Adapter, do not worry. The Arduino code for this tutorial is very simple. The following pictures show the connection between Arduino Uno on the left side and NodeMCU on the right side with the I2C LCD display. Take a look at my post “LED’s Control through TTY“. In order to Program ESP8266 Module, we need to connect it to a computer. All Arduino boards have at least one serial port (also known as a UART or USART), and some have several. A Serial Peripheral Interface (SPI) bus is a system for serial communication, which uses up to four conductors, commonly three. DFRobot Dec 20 2019 PROJECTS. Let’s write Arduino sketch of SPI communication for NodeMCU. Raspberry Pi uses UART (Universal Asynchronous Receiver/Transmitter) is a serial communication protocol in which data is transferred serially i. So data sent by Arduino will be received by the NodeMCU and vice versa. We have already seen how to connect arduino uno to NodeMCU (ESP8266) here. ESP8266 NRF24L01 Wifi Gateway with Arduino NRF24L01 Node. 1 The NodeMCU should serve up a web page showing current status of LEDs and two buttons to control them. Please read it first to understand all explanations. Compared to Arduino: * Cost - NodeMCU is cheaper compared to Arduino original. Joba Tsl2561 Library: IoT library for using the Tsl2561 luminosity sensor: Joystick: Allows Arduino/Genuino boards to simplify the use of the Joystick. Just upload the code into Nodemcu / Arduino. To make sure ESP8266 Arduino core and the NodeMCU are properly set up, we'll upload the simplest sketch of all - The Blink! We will use the on-board LED for this test. Today, IOT applications are on the rise, and connecting objects are getting more and more important. com 2018 Master Board creates Access Point */ #include #include const char *ssid. You’re going to need two Arduino’s for this tutorial. If you want to know more about the I2C technology please check out my 'Tutorial Number 09'. The main ingredient which makes communication between the Arduino and the c# software we will be building possible is the Serial communication protocol. 0+EDR (Enhanced Data Rate) 3Mbps Modulation with complete 2. Power up the board and open the serial monitor from arduino IDE Serial Communication Between Nod eMCU and Arduino. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. ESP32 supports 3 Serial ports so you need not to use SoftwareSerial as in general Arduino. because it uses TTL serial communication. h) to use other GPIO pins as Serial RX and TX lines. simple communication between AtTiny85 and Arduino (I2C) arduino,i2c,attiny. NodeMCU V3 For Fast IoT Application Development. I have put the following code on the NODEMCU. The Nod Stack Overflow. This means you are using software serial on the hardware serial pins, which is a fatal mistake. This article describes using NodeMCU serial passthrough with an Arduino Pro Mini to remote control a signal generator. Then, on the bottom of the page, there is a text field for additional board manager. All ESP boards have at least one serial port (also known as a UART or USART): Serial. The app must auto-start. This Video demonstrate the serial communication between Arduino and ESP8266-12E(NODE MCU). You can use hardware serial or software serial. 1 Serial ESP8266 and Arduino. Pin2 is Rx and pin3 is tx, which will be defined in the programming using the software serial library. Some boards like the NodeMCU have an on-board resistive voltage divider, to get an easier 0 - 3. Serial communication occurs on digital pins 0 (RX) and 1 (TX) as well as via USB. The UART (Universal asynchronous receiver/transmitter) module allows configuration of and communication over the UART serial port. Bluetooth is a technology for wireless communication. Just make sure you set the serial port speed (baud rate) to be the same at. Materials required:-Arduino uno; 16×2 LCD; LCD breakout board; HC-05 Bluetooth; jumper wires. I am working on a project where I have to send 5 potentiometer data (to drive 5 motors) from one nodemcu to another. The circuit diagram for RF receiver using Arduino Nano is shown below. Nodemcu Baseboard NodeMcu Lua WIFI Development Board ESP8266 Serial Port Baseboard is an open-source networking platform. Serial communication on pins TX/RX uses TTL logic levels 3. Connect: VCC to 3. Installation and Running. They’re very similar for OSX and Linux. WiFi Communication Between Two ESP8266 Based MCU Through the Home Router: Hello Makers!Some months ago I started to experiment ESP8266 based NodeMCU and Wemos boards. When i press reset for 3 seconds, it works "sometimes" I use arduino 1. Mar 23, 2019, 04:40 am. a NodeMCU board now we can move on to communication between the. Regardless of the actual spec, to address your question of ESP/Arduino communication reliability: As the ESP8266 and the ATmega2560 are on the same board one would assume that the (serial) communication between the two would be faultless. com 2018 Master Board creates Access Point */ #include #include const char *ssid. It is a full duplex connection, which means that the data is. Communication. The term "NodeMCU" by default refers to the firmware rather than the development kits. 9 DevKit as shown above. Posted: (1 days ago) Introduction to WebSocket. It supports JSON serialization, JSON deserialization, MessagePack, streams, and fixed memory allocation. Downloading ESPlorer IDE. Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware. A lot of articles online show a setup with Arduino Mega which does have two HW serial IO using which you can easily get 115200 and more. begin (115200); while (!. Having your ESP8266 flashed with NodeMCU, follow the next schematics to establish a serial communication between your FTDI programmer and your ESP8266 to upload some code. Once the code is uploaded, open the Serial Monitor of Arduino. After connecting to your NodeMCU AP network, load up a browser and point it to 192. The code written in the void setup(), is used to begin the serial communication at 115200 baud rate. The main ingredient which makes communication between the Arduino and the c# software we will be building possible is the Serial communication protocol. It comes with CP2102 USB serial programmer which is better than CH340 USB serial programmer present in some older versions & Lolin Board. You’re also going to need to 2 Arduino CAN Bus Modules. Access point always have IP: 192. Using NodeMCU serial passthrough with a partner Arduino is a fast, simple and cheap way to overcome ESP-12E limitations. It is also a simple, yet effective method of communication and is easy to learn and master for beginners. Serial may sound like a tasty breakfast food, but its actually quite different. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. 0: JrkG2: Jrk G2 library for Arduino. Arduino and NodeMCU. In this tutorial, you will learn how to use NodeMCU on Arduino IDE. It uses Lua scripting language programming. I asked the Arduino subreddit but I also wanted to ask you guys to see if you had any ideas. The uses for this are endless! In case data. Now in Tools → Port, choose communication port on which board is connected. Unlike the sketch file (. Earlier, I shared a video which does the vice-versa, i. So, do tests before using any GPIO for I2C applications. In my case it’s COM3. The other library is NTPClient , this library connects the ESP8266 WiFi to a time server, this server sends time information to the module. Re: Serial communication between nodemcu and Arduino The serial port monitor of the Arduino IDE is not suitable for displaying binary values, it supports only format coded in ASCII, there are more powerful terminals available for download freeware, such as Realterm for example. While the Feather HUZZAH ESP8266 comes pre-programmed with NodeMCU's Lua interpretter, you don't have to use it! Instead, you can use the Arduino IDE which may be more familar.