I have a Witty Pi 4 L3V7 connected to a Raspberry Pi 4. Everything was working fine until now. Now, when I press the power button, the Raspberry Pi doesn’t start; the white LED flashes once and nothing else happens. In standby mode, the LED keeps blinking as usual.
If I run ./wittyPi.sh, it gives me a message saying that it cannot detect the module.
The physical connection has not changed compared to when it was working.
If I disconnect the Witty from the Raspberry Pi and the battery, the green LED lights up solid and the blue LED blinks. If I press the power button, the white and red LEDs briefly turn on.
I tried with another Raspberry Pi and it still doesn’t work.
Please confirm whether the battery you are using can still output the rated current. If it can, you may perform a test without the external power supply on Type-C connector. This will rule out the possible problem from the power supply.
I am not sure how you can run ./wittyPi.sh if you can not boot up your Raspberry Pi. If you connect power supply directly to Rasbperry Pi, then the circuit on Witty Pi 4 L3V7 is not powered and hence you can not see its I2C device in Raspberry Pi. It is normal that the device is not detected in such case.
"green LED lights up solid and the blue LED blinks" is also the normal behavior when the board gets powered without Raspberry Pi and battery. Red LED should light up solid after pressing the button though. This problem may also come from the power supply (voltage unstable and MCU gets reset).
In the end, I managed to get the Witty Pi working. After trying several power supplies without success, I decided to reload the firmware using the guide https://www.uugear.com/portfolio/compile-flash-firmware-for-witty-pi-4/ .
One detail I forgot to mention is that the error occurred after rebooting right after changing the “seconds before shutdown” parameter and setting it to 0. I’m not sure if that might be related.