Diff: main.cpp

Revision:

1:ccef6d6d9b62

Parent:

0:671eadfdf703

Child:

2:3d87a559769a

--- a/main.cpp	Tue May 17 16:03:36 2016 +0000
+++ b/main.cpp	Tue May 17 23:38:58 2016 +0000
@@ -1,10 +1,20 @@
+/* mbed Seeed Archlink Temperature Humidity and Servo starter code
+ * 
+ * This program take the temperature humidity reading and writes to the USB serial
+ * The servo is actuated for each loop-iteration
+ * Fow how to view the serial output, please refer to the mbed serial cookbook: https://developer.mbed.org/handbook/Serial
+ * 
+ * Neil Tan
+ */
+
+
 #include "mbed.h"
 #include "Servo.h"
 #include "DHT22.h"
 
 DigitalOut myled(LED1);
-Servo myservo(p4);
-DHT22 sensor(p6);
+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);
  
 int main() {
@@ -14,9 +24,9 @@
     pc.printf("\r\n******************\r\n");
     while (1) {
         myled = 1;
-        status = sensor.sample();
+        status = sensor.sample();  //returns false if the sensor checksum fails
         if (status) {
-            pc.printf("Temperature is %f C \r\n", sensor.getTemperature()/10.0f);
+            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 {
             pc.printf("Error reading sample \r\n");