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Wrong values (overflow) #59

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Wrong values (overflow) #59

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9 changes: 7 additions & 2 deletions DHT.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -151,9 +151,14 @@ boolean DHT::read(bool force) {
// and we don't want any interruptions.
InterruptLock lock;

//https://github.com/adafruit/DHT-sensor-library/issues/48
// End the start signal by setting data line high for 40 microseconds.
digitalWrite(_pin, HIGH);
delayMicroseconds(40);
//digitalWrite(_pin, HIGH);
//delayMicroseconds(40);
// WEB: This is an error. DHT tries to pull the line low as soon as it came back to high.
// therefore the low-high transition after the start signal "low" needs to be realised by
// the pullup resistor only, uC pin must already be in INPUT mode.


// Now start reading the data line to get the value from the DHT sensor.
pinMode(_pin, INPUT_PULLUP);
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