Hello,I am planing to measure a single value just once a day.The Arduino should be powered by a solar panel. Therefore, I am focusing mainly on the power consumption in "hibernate" mode. I found a very interesting product (TPL5110 Power Timer) with a power draw of 20uA:https://www.adafruit.com/product/3435Unfortunately, the maximal sleep time is 2h.Any ideas, suggestions, or similar project I could learn from?/Tomek
You have not said which Arduino, but the ATMEGA328P has a watchdog timer that can be used for this, but its not very accurate. So you need to decide what exactly 'once a day' means.
By once a day, I mean one measurement (roughly) every 24 hours.
So if its every 20 hours or every 28 hoursa thats OK ?