Witty pi 4 compatibility for Raspberry Pi OS 64-bit kern 6.12 debian 13

A reboot is a combination of shutdown and startup. If the startup comes too late, Witty Pi may cut the power. Witty Pi detects the startup by monitoring the voltage on TxD pin, which should go ~3.3V when the system is booting.

Do you have something (e.g. a menu to choose from options) that actually block the booting process?

Is this problem always reproducable?

Thank you, here is the data from my recent tests:

1. Power Cut Delay Test: I increased the 'Power cut delay after shutdown' from 7 seconds to 25 seconds.

   • Result: two tests: The behavior is inconsistent. In one test, the Pi took ~45 seconds to lose power. In a second test, it rebooted successfully.

2. Halt Behavior: one test: When running sudo halt, the Pi's Green LED stops, but the Red LED remains solid and the Witty Pi’s White LED does not pulse. 

3. Bootloader Config: My POWER_OFF_ON_HALT is set to 0 and WAKE_ON_GPIO is 1.

Is there more tests I should do ? What settings do you recommend in general ? 

Best,

@cmits_uugear It is recommended to connect a display to your Pi when doing the reboot test. Whether it enters the booting procedure in-time is a very important information.

Usually, the rebooting only cause the TxD to go low for 1-2 seconds. If something is blocking the boot, the TxD pin will not rise in-time and Witty Pi may cut power after timeout.

Witty Pi do not consider "halt" as shutdown state. You can consider halt mode is not supported by Witty Pi.

We do not recommend to change anything in Bootloader Config. Witty Pi is not using halt mode to save power, it fully cuts the power instead.