Ouiv_Deep_Sleep

Two codes that run on an arduino MRFOX 1200 with a Cortex M0. They execute an operating routine and then go to sleep until the user push a button to wake it up.

Video example : 10 blinks and deep sleep with interruption - example

The schematic :

DeepSleep_ZeroPowerConsumption

This code is a test of the library ZeroPowerManager

This one claim to archieve 6 uA sleep current tested on the Feather M0 board family. It also enable to control the clock frequecy.

Measured Adafruit Feather M0 WiFi with:

• LiPo removed, LDO removed
• Powered from separate 3.3V supply
• All ports + spi disabled
• USB off

48 MHz: 7.5 mA
8 MHz: 1.5 mA
32 KHz: 200 uA
Sleep : 6 uA

⚠️ I couldn't get the attach interrupt to work with this code

DeepSleep_dummy_handler

With this code, I've archieved 50μA of power consumption according to the above schematic. The 2AA power supply deliver around 3.3v voltage.

⚠️ Don't know the real effect of it but I removed the pin initialization in "wiring.c", a core lirbary of samd21 (according to this forum issue).

Find "wiring.c" on macos :

• Open terminal
• type : cd ~/Library/Arduino15/packages
• type : open . to open finder here and find wiring.c (generally it's on "hardware/samd/version/cores/arduino")