Hi all, I have a NodeMCU as a master and two Arduino UNO's as slaves connected via I2C. The slaves collecting data from sensors and sending it to Master and displaying it in Serial Monitor. However I can receive data from 1 slave but not the other. Below is a simple code of 2 slaves connected to a …

NodeMCU - Master and UNO - Slaves (I2C communication)

GolamMostafa August 25, 2021, 8:11am 13

Who is Master -- NodeMCU or UNO-1?

You are not following my guide lines!!!