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Hello,
I'm setting up a Witty Pi 4 L3V7 with a Raspberry Pi Zero W and I'm seeing an issue where sometimes after the Raspberry Pi shuts down the Witty Pi's red power LED stays lit and the Raspberry Pi cannot be powered on with a button press after (the white LED lights up when the button is held but then nothing happens). It remains unbootable until the Witty Pi is hard reset (holding down the power button for 6+ seconds).
To test this I used the Witty Pi's power button to turn on the Raspberry Pi, wait for it to boot, then use the power button to turn it off. It powered on/off without issue twice, then on the third power off the red LED stayed lit after the Raspberry Pi shut off. I reset the Witty Pi and booted it and pulled the following logs from wittyPi.log:
[xxxx-xx-xx xx:xx:xx] Witty Pi daemon (v4.21) is started. [xxxx-xx-xx xx:xx:xx] System: Raspbian GNU/Linux 12 (bookworm), Kernel: Linux 6.6.62+rpt-rpi-v6, Architecture: armhf [xxxx-xx-xx xx:xx:xx] Running on Raspberry Pi Zero W Rev 1.1 [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] RTC offset register has value 0x78 [xxxx-xx-xx xx:xx:xx] Seems RTC has good time, write RTC time into system [xxxx-xx-xx xx:xx:xx] Writing RTC time to system... [2025-01-12 19:45:09] Done :-) [2025-01-12 19:45:09] Firmware ID: 0x37 [2025-01-12 19:45:09] Firmware Revison: 0x07 [2025-01-12 19:45:09] Current Vin=3.63V, Vout=5.22V, Iout=0.08A [2025-01-12 19:45:10] System starts up because the button is clicked. [2025-01-12 19:45:16] Send out the SYS_UP signal via GPIO-17 pin. [2025-01-12 19:45:17] Pending for incoming shutdown command... [2025-01-12 19:45:20] Schedule next shutdown at: 2025-01-13 06:01:30 [2025-01-12 19:45:22] Schedule next startup at: 2025-01-14 06:00:00 INFO:waitress:Serving on http://0.0.0.0:8080 [2025-01-12 19:45:48] Shutting down system because button is clicked or GPIO-4 is pulled down. [2025-01-12 19:45:49] Halting all processes and then shutdown Raspberry Pi... [xxxx-xx-xx xx:xx:xx] Witty Pi daemon (v4.21) is started. [xxxx-xx-xx xx:xx:xx] System: Raspbian GNU/Linux 12 (bookworm), Kernel: Linux 6.6.62+rpt-rpi-v6, Architecture: armhf [xxxx-xx-xx xx:xx:xx] Running on Raspberry Pi Zero W Rev 1.1 [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] RTC offset register has value 0x78 [xxxx-xx-xx xx:xx:xx] Seems RTC has good time, write RTC time into system [xxxx-xx-xx xx:xx:xx] Writing RTC time to system... [2025-01-12 19:46:50] Done :-) [2025-01-12 19:46:50] Firmware ID: 0x37 [2025-01-12 19:46:50] Firmware Revison: 0x07 [2025-01-12 19:46:50] Current Vin=3.63V, Vout=5.22V, Iout=0.08A [2025-01-12 19:46:51] System starts up because the button is clicked. [2025-01-12 19:46:57] Send out the SYS_UP signal via GPIO-17 pin. [2025-01-12 19:46:58] Pending for incoming shutdown command... [2025-01-12 19:47:02] Schedule next shutdown at: 2025-01-13 06:01:30 [2025-01-12 19:47:03] Schedule next startup at: 2025-01-14 06:00:00 INFO:waitress:Serving on http://0.0.0.0:8080 [2025-01-12 19:47:43] Shutting down system because button is clicked or GPIO-4 is pulled down. [2025-01-12 19:47:43] Halting all processes and then shutdown Raspberry Pi... [xxxx-xx-xx xx:xx:xx] Witty Pi daemon (v4.21) is started. [xxxx-xx-xx xx:xx:xx] System: Raspbian GNU/Linux 12 (bookworm), Kernel: Linux 6.6.62+rpt-rpi-v6, Architecture: armhf [xxxx-xx-xx xx:xx:xx] Running on Raspberry Pi Zero W Rev 1.1 [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] RTC offset register has value 0x78 [xxxx-xx-xx xx:xx:xx] Seems RTC has good time, write RTC time into system [xxxx-xx-xx xx:xx:xx] Writing RTC time to system... [2025-01-12 19:49:10] Done :-) [2025-01-12 19:49:10] Firmware ID: 0x37 [2025-01-12 19:49:10] Firmware Revison: 0x07 [2025-01-12 19:49:11] Current Vin=3.63V, Vout=5.21V, Iout=0.12A [2025-01-12 19:49:11] System starts up because the button is clicked. [2025-01-12 19:49:17] Send out the SYS_UP signal via GPIO-17 pin. [2025-01-12 19:49:18] Pending for incoming shutdown command... [2025-01-12 19:49:21] Schedule next shutdown at: 2025-01-13 06:01:30 [2025-01-12 19:49:23] Schedule next startup at: 2025-01-14 06:00:00 INFO:waitress:Serving on http://0.0.0.0:8080 [2025-01-12 19:49:41] Shutting down system because button is clicked or GPIO-4 is pulled down. [2025-01-12 19:49:42] Halting all processes and then shutdown Raspberry Pi... [xxxx-xx-xx xx:xx:xx] Witty Pi daemon (v4.21) is started. [xxxx-xx-xx xx:xx:xx] System: Raspbian GNU/Linux 12 (bookworm), Kernel: Linux 6.6.62+rpt-rpi-v6, Architecture: armhf [xxxx-xx-xx xx:xx:xx] Running on Raspberry Pi Zero W Rev 1.1 [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] Witty Pi is not detected, retry in one second... [xxxx-xx-xx xx:xx:xx] RTC offset register has value 0x78 [xxxx-xx-xx xx:xx:xx] Seems RTC has good time, write RTC time into system [xxxx-xx-xx xx:xx:xx] Writing RTC time to system... [2025-01-12 19:54:00] Done :-) [2025-01-12 19:54:00] Firmware ID: 0x37 [2025-01-12 19:54:00] Firmware Revison: 0x07 [2025-01-12 19:54:00] Current Vin=3.63V, Vout=5.22V, Iout=0.08A [2025-01-12 19:54:01] System starts up because the button is clicked. [2025-01-12 19:54:07] Send out the SYS_UP signal via GPIO-17 pin. [2025-01-12 19:54:08] Pending for incoming shutdown command... [2025-01-12 19:54:11] Schedule next shutdown at: 2025-01-13 06:01:30 [2025-01-12 19:54:13] Schedule next startup at: 2025-01-14 06:00:00 INFO:waitress:Serving on http://0.0.0.0:8080
I don't notice anything different between the three shutdowns in the logs. I was looking at other threads and confirmed from on each boot the white activity LED on the Witty Pi blinked twice on startup, which I understand means the SYS_UP signal was received by the firmware. I did notice on the incomplete shutdown the white activity LED appeared to flash once as the Raspberry Pi was shutting off, but unsure what that could mean. After resetting it, powering it on, and pulling the logs, powering it off with the button worked without issue again. Any idea of what could be causing this inconsistency?
Thanks in advance!
Posted : 13/01/2025 2:53 am
Unfortunately the logs do not really help for diagnosing such issue, because the issue happened after the system has been shut down, and no new content could be written into the log file.
Since revision 0x03, the firmware has the ability to handle the situation that the Pi crashes during the shutdown. According to your log, your firmware version is 0x07, so I guess missing SYS_UP signal could be the only possible reason. However you mentioned the the white LED blinked twice on boot, which seems to rule out that possibility either.
If this situation happen again, you may measure the voltage between the TXD and GND pins after your Pi has been shut down. Although that could not directly solve the problem, it could provide more input for troubleshooting.
Posted : 13/01/2025 2:23 pm
Topic starter
I don't have a multimeter on hand immediately to measure the voltage but I did notice it happen twice again.
The first instance: Hitting the power button made the white Witty Pi LED light up until release and the green Raspberry Pi activity LED blink after release but it returned to solid and did not power off the system, then hitting the button again made the white LED light again and this time did power off the Raspberry Pi but the red Witty Pi LED remained on and was stuck until a reset.
The second instance: Hitting the power button lit up the Witty Pi white LED until the button was released and initiated the Raspberry Pi shutdown. However I noticed before the green Raspberry Pi activity LED turned off, the white Witty Pi activity LED blinked again once and then after the Raspberry Pi turned off the red Witty Pi LED remained on once again and was stuck until a reset.
On both boots the white activity LED on the Witty Pi blinked twice which should have confirmed SYS_UP was received.
This post was modified 19 hours ago by doob
Posted : 13/01/2025 7:04 pm