I just purchased a Beaglebone Green Wireless and a Beaglebone Relay Cape. The BBGW was flashed with the latest debian and properly boots. When I connect the relay cape, all lights are light up solid. I cannot connect to the BBGW.
The Relay cape works fine on my Beaglebone Black though.
I don’t have BBGW board, so all of this is just a GUESS.
My thoughts are you have to find the correct overlay. You are dealing with legacy stuff and who knows what image you have. You will have to post the image versions on here so the help can be refined. What code are you using to access it?? Plenty of variables and many changes to deal with.
In /boot/uEnv.txt, there are some particulars to add/subtract.
If you only need micro SD Card, uncomment eMMC.
If you only need the Relay Cape and no HDMI, uncomment the HDMI line too.
For the Relay Cape, check in /boot/overlays/ and see if the .dtbo is located in those files. I am going on pure memory, i.e. so I may be off on the location of the .dtbo file(s) for the Capes.
Seth
P.S. Once you reboot without the Cape attached, see if it boots. I am not sure why the Cape interferes with the booting process like you stated. Also:
What does the output of these commands state:
uname -a
cat /etc/dogtag
I have a board around here somewhere. I need to find it and try to see what image I have on it and if the Relay Cape works still with it.
/boot/dtbs/5.10.168-ti-r79/overlays are where the files are located.
Also:
disable_uboot_overlay_emmc=1
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
I have disabled these to make the Cape work as I do not need eMMC, Video, and/or Audio.
Try to disable those first and see how far you get. Then, report back if there is something else not working.
Seth