Hey PJ…
I think I have resolved the problem.
Turns out that OFFICIALLY… the XIAO RP2350 doesn’t HAVE an A3 pin.
At least not according to the Wiki page.
It DOES have a D3 pin.
The CircuitPython “board” for the XIAO RP2350 has a pin entry for A3.
I used A3 according to the Adafruit Tutorial page for the CAN BFF (they used all Ax pin definitions).
When I used A3, I got the timeout error message.
Seeing there is no A3 defined on Seeeds wiki page, but there is a D3… I changed my code to use the Dx designations.
Guess what… THAT worked.
I posted to the Adafruit learning page and told them they need to change their example code since ALL XIAO boards do not have an A3 and since these are digital connections (interrupt, reset, standby AND cs)… WHY would they use Analog pin definitions?
Well… as Inspector Clouseau liked to remark… another mystery is solved.