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Brendan, on our PCB did we leave a way for connecting +3.3V to DHT22 and also possibly for the temperature sensor DS18B20? I am trying to use DS18B20 in the parasitic mode (without voltage In) but it is not very reliable.
I cannot see any obvious 3.3V connections, apart for going straight for the legs of the regulator or the big capacitor.
Patrice and Gilles, do you use the DS18B20 in parasitic mode?
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