Sylvester Demmel / DHT

Library for DHT11 DHT22 AM2302 and similar sensors. Now with value after decimal point for DHT22.

Dependents:   Seeed_Grove_Temp_Humidity_Example DHT11_Temp_Humidity IoT_W5500_MQTT

Fork of DHT by Components

Diff: DHT.cpp

Revision:
4:0667c68ef5e0
Parent:
3:6937e130feca
Child:
5:cce2105f7365
--- a/DHT.cpp	Sat May 28 11:11:34 2016 +0000
+++ b/DHT.cpp	Sat Jan 07 21:58:20 2017 +0000
@@ -118,7 +118,7 @@
     }
 
     // uncomment to see the checksum error if it exists
-    //printf(" 0x%02x + 0x%02x + 0x%02x + 0x%02x = 0x%02x \n", DHT_data[0], DHT_data[1], DHT_data[2], DHT_data[3], DHT_data[4]);
+    // printf(" 0x%02x + 0x%02x + 0x%02x + 0x%02x = 0x%02x \n", DHT_data[0], DHT_data[1], DHT_data[2], DHT_data[3], DHT_data[4]);
     data_valid = DHT_data[0] + DHT_data[1] + DHT_data[2] + DHT_data[3];
     if (DHT_data[4] == data_valid) {
         _lastReadTime = currentTime;
@@ -135,7 +135,7 @@
 
 float DHT::CalcTemperature()
 {
-    int v;
+    float v;
 
     switch (_DHTtype) {
         case DHT11:
@@ -207,8 +207,7 @@
 
 float DHT::CalcHumidity()
 {
-    int v;
-
+    float v;  // needs to be float for DHT22 otherwise only zero after decimal point
     switch (_DHTtype) {
         case DHT11:
             v = DHT_data[0];