Would need to see your code. You could be doing things in a non RTOS friendly way. Here it is :) When I change line "batt = analogRead(34);" with "batt = 0;" (no analogRead) everything works fine. #include "esp32-hal-adc.h" #include <NMEAGPS.h> int batt; int last_batt = 0; float lat=0.0, lng = 0.0;...

Hi, I connected GPS module on Serial2 (pins 16 and 17) and it worked great on its own. Then I added in loop analogRead on pin 34 every 10 seconds using millis() delay. Problem is that GPS works first 10 seconds until first analogRead is done. After that GPS module stop sending data through Serial2. ...