Petoi Camp

Upgraded to the Biboard, but when I try to upload to it I keep getting: Failed to connect to ESP32: No Serial data received Anyone run into this or have any ideas? Checked everything I can think of, re-installed everything, new cable. Probably something silly that I'm missing...

As indicated here https://www.petoi.camp/forum/hardware/next-steps-pogo-pins-for-attaching-raspberry-pi-and-grove-vision-ai-module i attached a Raspberry Pi to the Nyboard using the 2x5 socket (and pogo pins). I can ssh to the Raspberry Pi and use serial commands to interact with the Bittle, cool. But unfortunately I cannot shutdown the attached Rapberry Pi as usual using "sudo shutdown -h now". It always reboots, my guess as it is attached to the Nyboard and gets somehow triggered to boot right after the shutdown command. How can i achieve a safe shutdown / power off? Thanks.