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I changed the Witty Pi 2 pins used for “detect the switching off signal” and LED (GPIO 7 and 8) so that only the GPIO pin between the sixfab NB-IoT and Witty Pi 2 shields.
Black arrows are used by witty pi 2:
I get this error when i run the IntermadiateTutorialNBIoT.py example:
raise SerialException(“Could not configure port: %s” % msg)
serial.serialutil.SerialException: Could not configure port: (5, ‘Input/output error’)
But all the other tests for the Relay, LED, Lux, Temperature, Humidity etc. works just fine!
This is how boths shields look like when wired up with dupont wires 😛