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arduino-libraries / ArduinoLowPower

Powersave features for SAMD boards
GNU Lesser General Public License v2.1
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Can't get it to low power during sleep - Samd21 #19

Open maxholgasson opened 4 years ago

maxholgasson commented 4 years ago

Hi, I'm using a ATSAMD21G18A with this library and while sleeping the power consumption doesn't go 2mA. Unfortunatly that's to much for my application. Is there any chance to get it lower with this lib?

facchinm commented 4 years ago

Hi @maxholgasson , do you have anything connected to the chip? All pins should be high Z to reach the maximum powersave, so you can skip pin initialization by declaring VERY_LOW_POWER at board level

https://github.com/arduino/ArduinoCore-samd/blob/b0eb400803cadf9727ab38d5b1c2fb46ab8eeec9/cores/arduino/wiring.c#L85-L91

https://github.com/arduino/ArduinoCore-samd/blob/master/boards.txt#L219

maxholgasson commented 4 years ago

Thanks for your answer!! Yes I had some other parts connected but tried it also with the blank chip, only a crystal attached I will try your suggestion