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The slave responds with its address to the master. In summary, This project shows how the Arduino uno and the ESP8266 or nodeMCU communicate via I2C protocol. The nodeMCU as a master sends a "hello ...

Complete code for NodeMCU Webserver is given in the end of this tutorial. Connect the NodeMCU with the laptop and choose the board & port correctly and then hit the Upload button. Learn how to program ...

If you want to develop a program on Arduino with Raspberry Pi, then this tutorial has all the steps you need to take for it, in detail.