I’m using a I2C Shield for WiPy2 & LoPy with a LoPy4. I’m communicating with sensors over the I2C interface. The documentation states:
“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.”
Which GPIO pin?