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espurna/code
Maxim Prokhorov 5ae0eb88ac sensor/dht: increase the delay per DHT22 datasheet
Operating specifications / Communication and signal

"Data-bus's free status is high voltage level. When communication
between MCU and DHT22 begin, program of MCU will transform data-bus's
voltage level from high to low level and this process must beyond at least
**1ms** to ensure DHT22 could detect MCU's signal, then MCU will wait 20-40us for
DHT22's response."
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