press button on pico and start device by pluggin in USB cable
picotool load rp2-pico-20220117-v1.18.uf2
restart
rshell -p /dev/ttyACM0 --buffer-size 512
cp pico-tempguard.py /pyboard/main.py

pip install mpremote
mpremote reset; mpremote run pico-tempguard.py