We did some extensive tests and it turns out that setting the firmware to run as cron job may have lead to the issue. So we’ve changed to use a startup script to set the program to run on startup. If you perform ‘git pull’ you should see a newly added file build.sh. It will compile the firmware and add a startup script to /etc/init.d/. Make sure you remove the existing entry on crontab (sudo crontab -e, remove the last line). Then restart RPi and see if it works. Thanks.