Update the timing to allow for faster readings. Remove unneeded pull …

…up after the conversion start : adafruit/DHT-sensor-library#48
seblucas · Oct 18, 2016 · 03f9bcf · 03f9bcf
1 parent 0c9f69e
commit 03f9bcf
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/dht22.c b/dht22.c
@@ -43,12 +43,9 @@ static int read_dht22_dat()
   // pull pin down for 18 milliseconds
   pinMode(DHTPIN, OUTPUT);
   digitalWrite(DHTPIN, HIGH);
-  delay(10);
+  delay(250);
   digitalWrite(DHTPIN, LOW);
-  delay(18);
-  // then pull it up for 40 microseconds
-  digitalWrite(DHTPIN, HIGH);
-  delayMicroseconds(40); 
+  delay(20);
   // prepare to read the pin
   pinMode(DHTPIN, INPUT);