The master sends data to and requests data from slaves, including an 8-bit packet ID. Each slave uses this ID as an index into its callback function array to determine which function to execute.
Slave Return
Upon a request, the slave responds with a message containing a slaveCallbackIndex. The master uses this ID to select the corresponding callback function.
I2C Setup Master
The examples use the DOIT ESP32 DEVKIT V1 as the master. The ESP32 is connected to the Feelix motors through the Feelink board.
Default I2C pins on DOIT ESP32 DEVKIT are
SCL GPIO22
SDA GPIO21
Alternatively you can use
SCL GPIO32
SDA GPIO33
I2C Setup Slaves
The slaves can be connected with JSH cables to the FeeLink board.
The 3.3V outputs do not have to be connected.
