How can I calibrate voltage check on MF01S?

LED Flashlights – General Info 18650 Flashlights
1

If I click 3 times, the voltage readout says 4.1V on my MF01S when it reality it is 3.8V. It is way off and I was wondering it there is a way to calibrate it to be more accurate in anduril?

My other anduril flashlights are pretty close, between .1v, but not on my mf01s.

2

I have the same issue with one of my Anduril lights. It reads 4.4V when the cell is at 4.15V. I hope someone can help…

3

This is for using R1=360K, R2=47K
#ifndef ADC_44
#define ADC_44 239
#endif
#ifndef ADC_22
#define ADC_22 121
#endif

4

if its too high solder like 470-2200kOhm on top of R2
too low 2.2-10M ohm on R1

or as described change the ADC values flashing

5

Both methods seem a little complicated. I will do more testing and if it still reads .3v difference no matter what the voltage really is, then I can just remember that when checking. If it still reads only .3v when real voltage drops down more, then I guess I have a faulty mf01s then.

6

Its no fault the MCU compares the voltage divider to an internal reference
The reference has as well with the temperature sensor some variation from MCU to MCU