commentaires ajoutes

DHT11/lib/dht.py

@@ -29,7 +29,7 @@ class DTH:
 
     def read(self):
         self.__send_and_sleep(0, 0.019)
-        data = pycom.pulses_get(self.__pin,100)
+        data = pycom.pulses_get(self.__pin,100) #Return a list of pulses at pin. The methods scans for transitions at pin and returns a list of tuples, each telling the pin value and the duration in microseconds of that value.
         self.__pin.init(Pin.OPEN_DRAIN)
         self.__pin(1)
         bits = []
@@ -39,7 +39,7 @@ class DTH:
         	if a ==1 and 65 <= b <= 75:
         		bits.append(1)
 
-        if len(bits) != 40:
+        if len(bits) != 40: #the number of bits read must be exactly 40, i.e. 5 bytes
             return DTHResult(DTHResult.ERR_MISSING_DATA, 0, 0)
 
         # Calcul des bytes