christian mock on Nostr: npub1e2z26…yldaf npub1p4ca2…zxvkf I've done deep sleep ("power_down") mode with ...

npub1e2z26rv2fk5f9k8ex3xtu6whu5425u7dvn4ju40xr4hfve5q83uqyyldaf (npub1e2z…ldaf) npub1p4ca2k6hgmdydsfcmq8rq3fgzmwkct505d7paqmnyaffh5nwc5ks3zxvkf (npub1p4c…xvkf) I've done deep sleep ("power_down") mode with AVR controllers, where it wakes up by the watchdog timer, in my case about very 64 seconds. This (reading a sensor, sending via 868 MHz radio, going back to sleep) runs for a few years on a pair of AA batteries.

It takes a few hours with the datasheet of your chosen controller and some testing, but I guess any µC will have various power saving modes.