Hi,
I am trying to talk to two MCP23017 's over I2C with a ESP8266. They should be able to change their address with three pins assigned for it, but I don't understand how to do this.
Do I connect some to ground or +3V??
I am using CirucuitPython and bitbangio.
The scan works, but just shows one address (0x20)
Any help is welcome!