@goldfishalpha If there is a time window where micropython is running, you could try to push Ctrl-F in a terminal window. That forces a safe boot. Ctrl-C may work too. This time slot is hard to catch, because typically you cannot connect a terminal when the device is in deepsleep. An indication for start would be an increase in power consumption. So if you have a USB dongle which shows that, if gives the trigger.