Is it possible to enter deep sleep, but keep track of the time?
I’m using the arduino framework where you can get millis() since start-up. Is there a way to get millis the device was shut down for without any additional hardware like an RTC?
I would use RTC for most reliable and accurate* But others have used the SAMD-21
like in this link.https://forum.arduino.cc/t/low-power-sleep-how-to-keep-track-of-time/1091051
Can the Nrf52 XIAO wake up from deep sleep at specific time intervals? If so, how is this achieved?
Have a LQQK at this, The Xiao Nija Msfujino’s excellent work and research on it