Hi, I would like to come down to below 2mA average power consumption. My goal is to look for messages once/twice per day and sleep the rest in order to run on 7Ah for half a year. I have understood it is feasible to come down to 1.7mA on the MKR 1300. I guess the 1400 is similar (?). I ave understood Arduino is not made to be powered long on battery. Gammon favours building a circuit without ON-leds and voltage-regulator etc (http://www.gammon.com.au/power)
Here is a reference for 1300 stating 1.7mA is feasible. But it is not specific. https://www.thethingsnetwork.org/forum/t/mkrwan1300-high-current-in-sleep-mode/13749/2
I believe RTCZero is useful. Standby mode is probably not sufficient. It only brought me down to around 60mA. I guess deep sleep with something like set_sleep_mode(SLEEP_MODE_PWR_DOWN) is needed. Then I have understood that RTCZero is not working (?) since it is disabled? I have understood it is possible to sleep in cycles of 8 seconds.
What about this library? https://github.com/rocketscream/Low-Power
I am afraid to do too much trial and error. I don't want to brick the device sleeping forever. Any helpful person could share some code for how to get down to 1.7mA sleeping and waking up on a timer interrupt?