I'm trying to make a DHT22 with an arduino nano+sim800l. It's designed to work below 0 (-17° to 0°C).
The circuit i have is something like this:
The problem is that, after few mins, the sim module was not able to connect to internet, and after two hours, was totally off. Measuring the batteries, one of them was 3v, the other one 0.11v (fucking fake batteries)
So I changed the batteries for samsung ones, and i started to measure the voltage supplied to the sim module. (analogRead(A0)*5/1023)
It was working perfect for 5 hours, until....
If i call to the number, it's with tone (connected to the cellphone network), but it's without internet (so i'm not reciving data)
I don't know what could be the problem; do i need to change the step down?, do i need to search for anoher power supply?
Thanks for the help!
The modules i'm using are: Step down: lm2596 BMS: 2S 15A HX-2S-D01 Arduino: nano v3 Sim: sim800l Temp: DHT22