The problem is solved. The issue was that the relay hat /can/ use GPIO interrupts 20 and 21 to control CH1 and CH2. But those interrupts are also used by two of the Serial Expansion HATs. The solution, use different GPIO pins. Easy as cake.Once I get the Relay HATs onto the system, /dev/ttySC8 (for example) makes a lot of clicking noise when the activity led goes on and off. In addition, I'm getting "Possible RX FIFO overrun: 64" warnings in dmesg.
I would like to mark one of the previous posts as the "SOLUTION". How do I do that in this forum?
Statistics: Posted by pmelange — Tue Mar 19, 2024 8:58 am