WREN 12S ME SDK – I2C GPIO

The WREN 12S ME SDK uses the popular MCP23017 I2C GPIO Expander to interface to the Motor Controller and Input Controller.

Using an Arduino library, such as one available from Adafruit MCP23017, you are easily able to control both the inputs and outputs with simple lines of code.   An example of code can be found in the WREN 12S ME SDK – Board Bring Up and Test Code

An expanded external generic Arduino MCP230174 Tutorial can be found on tronixstuff

Home Automation, such as Tasmota, also supports as standard the MCP23017.  A specific datasheet is available from Tasmota.

A list of the GPIOs is shown below, taken from WREN 12S ME SDK – GPIO Matrix