On Mon, 11 Jun 2018 13:51:28 +0100, RobH  declaimed the
following:

>
>If it means anything, the camera red led is lit, which I assume the
>camera is working. How can I check the sensor?
>
 That may only reflect that you have /power/ to the board.

>I have checked the gpio pins and they are reading what they should, ie
>5v between live and ground, and 0v between motion pin and the 5v pin.
>

 Uhm... 0v between "motion pin" and 5v pin means the "motion pin" is at
5v also...

 BUT! RPi GPIOs are 3.3V inputs...
http://www.mosaic-industries.com/embedded-systems/microcontroller-projects/rasp
berry-pi/gpio-pin-electrical-specifications#rpi-gpio-input-voltage-and-output-c
urrent-limitations

A 5V signal on that "motion pin" could easily result in burning out the RPi
GPIO (if you are lucky, only the one GPIO will be killed)
http://www.notenoughtech.com/raspberry-pi/rpi-gpio/



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