I search for any information how to made aplication firmware upgrade, where file is stored into popular USB stick memory.

@zazas321 You no need external Vref to calibration. At some production stage (e.g programing) you can calibrate it by precision resistor connected instead your temperature sensor. Now you will know what count ADC must back and you can cancel different. I place pcb on special tool with spring needle ...

Hi, I try to start with ESP. I install tool from this tutorial https://www.youtube.com/watch?v=5IuZ-E8Tmhg and have two problems. I'm nevbie so please write like to stupid man. 1. VSC cannot download and install extension. I get info about XHR failed. I read that problem can be with my Proxy setting...