Diff: main.cpp

Revision:

2:3d87a559769a

Parent:

1:ccef6d6d9b62

Child:

3:98645a154332

diff -r ccef6d6d9b62 -r 3d87a559769a main.cpp
--- a/main.cpp	Tue May 17 23:38:58 2016 +0000
+++ b/main.cpp	Sat May 28 04:38:45 2016 +0000
@@ -8,27 +8,39 @@
  */
 
 
-#include "mbed.h"
-#include "Servo.h"
-#include "DHT22.h"
+#include "mbed.h"   // this tells us to load mbed related functions
+#include "Servo.h"  // library for the Servo
+#include "DHT22.h"  // library for the Temp&Humidity sensor
 
-DigitalOut myled(LED1);
-Servo myservo(p4);  //p4 works, using other pins is possible too
-DHT22 sensor(p6);   //the pin of the connected grove port
-Serial pc(USBTX, USBRX);
+DigitalOut myled(LED1);  // used as an output for the sensor
+Servo myservo(p4);       // p4 works, using other pins is possible too
+DHT22 sensor(p6);        // the pin of the connected grove port
+Serial pc(USBTX, USBRX); // serial TX & RX
  
+// this code runs when the microcontroller starts up
 int main() {
 
     bool status;
     pc.printf("\r\nDHT Test program");
     pc.printf("\r\n******************\r\n");
+    
+    // spin a main loop all the time
     while (1) {
+        // turn off the LED
         myled = 1;
-        status = sensor.sample();  //returns false if the sensor checksum fails
+        
+        // YOUR CODE HERE: get the status of the sensor checksum, sucessful or failed
+        
+        
+        // sensor checksum successful
         if (status) {
+            // printf the temperature from the sensor
             pc.printf("Temperature is %f C \r\n", sensor.getTemperature()/10.0f);  //the readings need to be divided by 10
-            pc.printf("Humidity is %f \r\n", sensor.getHumidity()/10.0f);
-        } else {
+            
+            // YOUR CODE HERE: printf the humidity from the sensor
+            
+            
+        } else {  // sensor checksum failed
             pc.printf("Error reading sample \r\n");
         }
         
@@ -37,6 +49,7 @@
         myservo = 1.0f;
         wait(5);
         
+        // turn on the LED
         myled = 0;
     }
 }
\ No newline at end of file