Ssh and "sudo shutdown -h now" just reboots the Raspberry Pi attached to Bittle Nyboard using 2x5 socket

Many thanks for your guess which might be a root cause for our ssh issue. Which Raspberry Pi do you use by the way or does this phenomena hold for all Raspberry Pi's?

The short beep from the NyBoard indicates it receives a signal from the serial port.

So maybe at the moment of shutdown, the voltage fluctuates, causing the NyBoard to receive a signal. NyBoard will execute any command and reply with a confirmation. For example, a skill command "ksit" will return its first character 'k' (token) to confirm completion. An unknown command will return its first character, too. So it may trigger the reboot.

You may disable this line to test.

@Jason What happens actually to the Raspberry Pi when i press the battery poweroff button? I this safe with regards to the Raspberry Pi resp. sdcard. If not is there a way to trigger a safe shutdown?

You'd better close all the programs on Raspberry Pi OS, then use the shutdown command to power off the Pi first, then long press the battery power off button for >=3s on the battery to power off the robot.

Okay, i see, in other words I need to solve my shutdown issue:-)

No ideas left, maybe its a Pi Zero 2 or pogo pin or Bittle firmware specific. Can't imagine the latter two as potential reasons.

Hello Jason,

thanks for the link. I already saw this thread but it does not help, i.e. watchdog service is not running at all and there is no "dtoverlay=gpio-poweroff,gpiopin=24" in my /boot/config.txt which is a solution in the above thread.

I have run through https://docs.petoi.com/apis/raspberry-pi-serial-port-as-an-interface again with the same result

The issue does not happen on a standalone RPI without attaching the Nyboard.

Then i am completly lost. "sudo shutdown now" command on RPI does not work for me, by the way the same holds for me if i power the RPI directly. The hardware switch ist still on the Arduino side.

Any ideas what could be the reason?

Unfortunately "sudo shutdown now" does not work too, i get a short beep from the NyBoard and the Raspberry Pi just reboots and green activity LED is switched on again. With other words you attached your Pi to the Nyboard using 2x5 pins and power everything using the Bittle battery and shutdown works for you?

My setup is the similar:

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux
pi@raspberrypi:~ $ cat /etc/os-release 
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"