The specs for both ESP32 and ESP8266 talk about RTC memory for data retention between deep sleep instances. This is useful for counts, previous sensor values etc.
I have found many useful articles on exploiting this with Arduino C code but I have found nothing to tell me how to do this with MicroPython. Am I bad searcher or does it not exist?
I have read of using flash memory but flash memory is reputed to have limited write cycles. Or am I wrong on this too?
Thanks in advance for any help on this.