Lowest consumption issue

Official Hardware MKR Family MKR FOX 1200
21

Dear all
Thank for this convrsation. I have a similar problem but I am still testing Arduino Low Power, but apparently this

sw.digitalWrite(wakeup_led,LOW);
LowPower.sleep(5000);
sw.digitalWrite(wakeup_led,HIGH);

goes to sleep because the led turn for 5 second.

But after free day, I see no difference. The battery goes from 4.2V to 3.7V in less than 3 days.
Without the lowpower, it goes down in 3 days as well . Not good.

I was expected to see a better difference.

My circuit is a bt different than yours. I am using Adafruit Feather MO adalogger with a AMD21 (ARM). I am not ueing sigfox but LoRa

Does some one has an experience with Adafruit Feather MO adalaoger and a RFM95 LoRa module radio in sleep mode, eight with AdruinoLowPower, or may be Sleepdog library from Adafruit?

I am going to investigate a bit more about wiring.c, but someone can tell exactely what does it and for what it's usefull? What impact if I remove it as well?

Many thanks for any support and help.

22

Hello @philgeek et al.,

this thread was really useful to get as low consumption as possible! I have a simple alarm created with the mkrfox1200, battery powered and using a reed switch.

Following the tips here now I'm able to get 128.7uA while on deepSleep mode. While transmitting, it's around 380-400uA for 5 seconds. For some reason it's a bit higher than what you got, but I think it's more than enough. The only modification I made to the vanilla Arduino framework has been, as said above, the changes on wiring.c

I'll monitor how long the battery lasts. For anyone interested, code of my app is here: