The LoPyI2C is a general-purpose I2C Interface Adapter for the Pycom WiPy2/LoPy. This adapter provides a Micro USB Interface for power and programming the WiPy2/LoPy. A onboard level-shifter is included to convert the WiPy2/LoPy I2C Interface to our 5V standard.
The LoPyI2C allows the WiPy2/LoPy to connect to hundreds of sensors, relay controllers, current monitoring devices, and a growing array of FET drivers.
The LoPyI2C is compatible with the WPKF Key Fob Receiver, allowing a Key Fob transmitter to control the I/O lines of the WiPy2/LoPy. This interface adapter is compatible with WiPy2/LoPy.
The I2C port 5V is controlled by a GPIO pin and can be turned on all the time depending on jumper selection. If you are using this with a battery then you can turn on and off the I2C port according to your needs.
I2C connections -- GPIO13(SCL)/GPIO12(SDA)
For more information on the WiPy, check out: https://www.pycom.io/