![]() Common both Grounds of NodeMCU and Arduino as per diagram. Also, connect the TX pin of NodeMCU to the RX pin of Arduino. Connect the RX pin of NodeMCU to the TX pin of Arduino. In the example below, digital pins 10 and 11 on your Arduino boards are used as virtual RX and TX serial lines. Make a circuit as per the given diagram after uploading the program. In general case, the serial will start at 115200 Baud Rate because NodeMCU works on that rate. SoftwareSerial allows serial communication on other digital pins using software to replicate the functionality. Here we are using SoftwareSerial to start Serial at 9600 Baud. Both of these libraries are available from the Arduino Library Manager, under the menu Sketch-> Include Library-> Manage Libraries. My NeoSWSerial is almost as good, and it will work on any two pins. You can perform it on NodeMCU and Arduino Board.įirst, learn about the SoftwareSerial Library of Arduino IDE. AltSoftSerial is much more reliable than SoftwareSerial, but you have to use two specific pins: 8&9 on a Nano. The headers are mapped in the same way and it is possible to substitute any Arduino Nano board with the new Arduino Nano Every. How Software Serial read and write works. Serial communication is available on digital pins 0 (RX) and 1 (TX): Rx is used to receive the data and Tx is for transmitting the data. Transmit data between two NodeMCU and Arduino using RX/TX lines. Learn Serial communication between NodeMCU and Arduino.
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