yesterday I had an instance -out of many- where my reboot didn't work.
My sketch was in a sending mode all the time (send something every 500 milllis)
I rebooted due to "issues" so it may have taken a bit longer to reboot.
I'm considering to increase the 2 seconds delay to 3 to be on a safer side.
Do you have any clue on how long the reboot is delayed? And how long uboot takes at most to start sending to the serial port?
Best regards
Jantje