Which Address and Data pins are available for use on this 2 Channel Relay Board


I’m using a # 2-Channel General Purpose SPDT Relay Shield + 6 GPIO with IoT Interface in a project and need to use a pin to flag for the sleep function. Can you tell me if A7 is available or if other Address or Data pins are unused to set the sleep up?

Thanks in advance.



Pin A7 is not utilized by the 2 channel relay controller so yes, you can use that line. The only lines utilized by the board are D0 and D1 which are used for I2C communication to the on board MCP23008 IC.

Perfect thanks very much for the fast reply!