PiCam via HDMI cable problem solved

[g3yjr]

My PiCam works with PD4 directly via a ribbon cable.

In order to use the PiCam via a cable, I bought a couple of Petit Studio adapters from Pimoroni and modified them for screen ground and pin 13.

I used an HDMI cable with an adapter fitted on each end. I can see 3.3V on the remote (PiCam end) adapter, so I seem to have the ribbons the right way up in their connectors, but the PiCam doesn't work via the HDMI cable.

I tried checking continuity ribbon to ribbon via the HDMI cable and all pins looked OK except pin 14. Might this be my problem?

73 Graham G3YJR

[G8GKQ]

Graham

That will be an unsuitable HDMI Cable. Pin 14 carries the configuration data commands for the camera. See the table on this page https://wiki.batc.org.uk/CSI-2_to_HDMI

Try another cable - even if you have to borrow it from the family TV!

Dave

[radiogareth]

That worked for me too, not all cables are created equal, ironically it was a cheap one that did work for me.
Good luck.
Gareth

[g3yjr]

I probably have another cable somewhere. I have previously used the current cable for actual HDMI from RasPi to a monitor.

I'll have a search.

73 Graham

[g3yjr]

I bought a new HDMI cable from Pimoroni & now I get an image on PD4's PiCam Monitor function.

The cable which works is marked 30V VW-1 HTS

There is some more detail on how I hooked up the HQ PiCam using an HDMI cable here:
https://g3yjr.wordpress.com/2023/01/10/ ... ortsdown4/

Thanks Dave & Gareth.

73 Graham