Diff: main.cpp

Revision:

3:3947bb0a2b4f

Parent:

2:55d40722ec9d

--- a/main.cpp	Sun Aug 06 00:24:22 2017 +0000
+++ b/main.cpp	Sun Aug 06 04:14:08 2017 +0000
@@ -8,15 +8,36 @@
  *
  * This program reads the analog input connected to pin PB_1 (UDK2
  * pin A0) and prints the result.
+ * And reads temperature/humidity from a DHT22 sensor and prints
+ * the result
  */
  
 #include "mbed.h"
+#include "DHT22.h"
+ 
+ DHT22 dht22(PA_1);
  
 int main() {
+    //analogue ldr pin
     AnalogIn a0(PB_1);
     
+    
     while (true) {
-        //read as float (0.0-1.0, multiply by 1000)
+        printf("-----------------------------\r\n");
+        int error = dht22.sample();
+        if (error == 1)
+        {
+            //it's required to divide these values by ten for some reason
+            float h = (float)dht22.getHumidity() / 10;
+            float t = (float)dht22.getTemperature() / 10;
+            printf("TempC: %2.1f, HumidP: %2.1f\r\n", t , h);
+        }
+        else
+        {
+            printf("Error: %d\n", error);
+        }
+        
+        //read LDR as float (0.0-1.0, multiply by 1000)
         float ldr1 = a0.read() * 1000;
         wait_ms(100);
         float ldr2 = a0.read() * 1000;
@@ -27,6 +48,6 @@
         float ldr = (ldr1 + ldr2 + ldr3) / 3;
         //output 3 digits . 3 decimal places
         printf("LDR: %3.3f\r\n", ldr);
-        wait(1);
+        wait(5);
     }
 }
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