In my case voltage divider didn’t work and we know Arduino provide 5V if it is connected to USB or 5V power supply. In addition to this I tried reducing baud rate but it also didn’t work. It was 3.3V that means voltage divider connection is correct.

I tried everything to make it work, checked voltage with multimeter. when I connect direct Arduino’s Tx to NodeMCU’s Rx, it starts showing sensor data. It shows blank screen on serial monitor, if it is connected via voltage divider. By using voltage divider you are reducing Arduino Tx 5V to 3.3V for Rx of ESP8266. Voltage Divider for NodeMCU’s Serial Communication Rx Pin:ĮSP8266 works on 3.3V and Arduino Tx pin supplies 5V, which can damage your ESP8266 NodeMCU. Software Serial library: This library is inbuilt in Arduino IDE. So I need this library for that sensor to work.

You can read How to setup ESP8266 for first time in Arduino IDE.Īs in this project I am transferring DHT sensor data from Arduino to NodeMCU and NodeMCU to Arduino. Make sure you already setup ESP8266 for Arduino IDE. Adafruit Sensor, (If you haven’t installed yet).10K ohms Resistor / 1k & 2k ohms resistor for voltage divider,.If you are doing lots of things on both Arduino and ESP8266 NodeMCU. Apart from this we will also see how to use software serial library on Arduino and Serial1 on ESP8266 NodeMCU, So that you can transfer data with another serial port, which we will be helpful. Moreover, we will transfer DHT22 Sensor data from Arduino to NodeMCU and NodeMCU to Arduino. 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.

Now let’s start coding.In this tutorial we will learn how to make serial communication between Arduino to ESP8266 & ESP8266 to Arduino. If everything works fine, we can proceed to the next step. You should use pip if you are using python2.Īfter the installation of PySerial, give it a test first. I’m using python3, so my command is pip3. Firstly, install PySerial using the command pip3 install pyserial. Now let’s try to communicate with Arduino. If you get /dev/ttyACM0, it means your Arduino is recognized by your Jetson Nano because ttyACM0 will only show up when 2 USB devices are connected to each other. But you can also adopt a much easier way, which is to talk to your Arduino simply via USB using Python.įirstly, connect your Arduino with Jetson Nano through USB cable. You can surely use Arduino compatible boards with onboard WiFi and BLE, like Wio Terminal or an ethernet shield to communicate with Jetson Nano through the network. When working on Arduino project with Jetson Nano or Jetson Xavier NX, sometimes we need to retrieve data from the Arduino or send a command to control the MCU.

Komunikasi serial arduino