Hi all, I would like to know the best power saving solution for my specific case. My xiao is battery powered (100mah li-ion), and stays most of the time (almost 99%) in system off, until intentionally waken up by the user with a tilt movement. The rest of the time I really don´t care too much abo…

Hi there, So , Comcast having Internet connectivity issues here, I set up a test with this code and a Xiao nRF52840 Sense BSP 1.1.10 non-mbed :grin: :+1: I’m getting 12.6 uA sleep & 7ma. Awake. [Sleep_sense_ppk-2] [Sleep_sense_ppk-1] [Sleep_sense_ppk-0] #include <Arduino.h> #include <blue…

I ended up using the first solution, because of a library interference between Adafruit_SPIFlash.h and InternalFileSystem.h Seems to work well, but I have to check the current, I will reply in a few days. Thks Luca

I’m here again, with some data. Now the current in system off is around 246uA, better than before but not yet what I need. Just to summarize my system off setup, now I put the onboard flash in deep sleep mode, no output is active, no serial, DC/DC is ON , the gyroscope is disabled, the acceleromet…

Hi there, What do you get with Baseline(everything off) ? your close, you will get it. :+1: GL :slight_smile: PJ :v:

As shown in the link below, the sleep current should be about 24uA. Why don’t you first see if you can achieve this 24uA and then activate the accelerometer and interrupts? As for accelerometer interrupts, @PJ_Glasso has lots of samples. PJ, if you are reading this, please comment. […

System off , nothing active, no wakeup source, no accelerometer , no gyroscope, no onboard flash, no serial: 82uA Same with accelerometer and wakeup: 257uA

Using the sample sketch attached to the link and still not get the sleep current to 24uA? The ppk2 is connected to the battery pad and 3.6V is applied.

Did some more tests… I loaded another example and I got 10uA, with accelerometer wakeup, just a little different wake up compared to the tilt I used before. Then I applied this wakeup to my full app and I achieved 82uA (not bad) Ok my app does sone more things… a lot of ble services, file read…

[image] lucamox: Now I have some 70uA to shave, maybe is the internal flash? If you mean on-board flash, it consumes about 25uA. If the external HX711 is powered from XIAO’s 3V3, this also adds up. To reduce the sleep current, I think it is useful to start with the smallest configuration an…

The Hx711 is powered through a mosfet switch, which is off during system off. The last test I did with the same exact hardware, only a different software, and I got 10uA. The only difference (in terms of software) is the use of the internalFS , I think is the flash of the cpu but maybe I’m wrong. …

For XIAO with no external connections, the sleep current will be about 2.4 uA when 3.6 V is applied to the battery pad. If the current exceeds 2.4uA, it may be consumed by external circuitry or the temperature-sensitive Schottky diodes used inside XIAO may have a high leakage current.