Re: Multiple sensors on the ADC pin and overvoltage protecti
Posted: Mon Jan 16, 2017 2:24 am
Hi
After a whole day of testing I came to the conclusion the ADC of the esp is pretty useless for such measurement. I tried 3 different modules, all of them showed me values in the range of (700-800) for a voltage of 0.95V. The first thing is, that they values differ too much(value should always be the same). Second that the value 1024 is reached at about 1.3V on one module and 1.45V on the other. Thats pretty useless unless I want to calibrate every single one of them.
How is your experience with the ADC measuring exact voltages ?
Am I missing something here ?
thanks in advance
regards
Erich
After a whole day of testing I came to the conclusion the ADC of the esp is pretty useless for such measurement. I tried 3 different modules, all of them showed me values in the range of (700-800) for a voltage of 0.95V. The first thing is, that they values differ too much(value should always be the same). Second that the value 1024 is reached at about 1.3V on one module and 1.45V on the other. Thats pretty useless unless I want to calibrate every single one of them.
How is your experience with the ADC measuring exact voltages ?
Am I missing something here ?
thanks in advance
regards
Erich