...I've just realised that the PINs were incorrect in pydpiper.service </facepalm>
I had entered the PIN, rather than the GPIO number so I've now changed it to...
--rs 7
--e 8
--d4 25
--d5 24
--d6 23
--d7 27
...but it still doesn't show any output. I've checked the wires for continuity - and all looks ok. Help!
I had entered the PIN, rather than the GPIO number so I've now changed it to...
--rs 7
--e 8
--d4 25
--d5 24
--d6 23
--d7 27
...but it still doesn't show any output. I've checked the wires for continuity - and all looks ok. Help!
![[Image: Raspberry-Pi-GPIO-Layout-Model-B-Plus-ro...00x900.png]](https://i0.wp.com/www.notenoughtech.com/wp-content/uploads/2016/04/Raspberry-Pi-GPIO-Layout-Model-B-Plus-rotated-2700x900.png)