Can anyone who is more experienced with the Heltec Cubecell AB01 board tell me which pins I can use for analogRead() from a sensor?
My sensor output is 0-5 volt, do I need to reduce this to 0-3.3 volt?
Jason from Heltec was so kind to answer: max input on pin 2 (ADC/Power Detection) is 3.7 volt.
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You’ll need a resistor divider to ensure you bring your 5V down to below 3.7V proportionally
Thanks, I’ll use it 