Robotics Kit Workshop / Mbed 2 deprecated Program4_ServoWithTempAndHumidity

how to control a servo with temp & humidity

Dependencies:   DHT22 Servo mbed

main.cpp@5:86adb825bfd2, 2016-05-28 (annotated)

Committer:
mbedAustin
Date:
Sat May 28 09:33:39 2016 +0000
Revision:
5:86adb825bfd2
Parent:
4:c778b9ed6508
Child:
6:14000499d474
Working Lab

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Maggie17 2:3d87a559769a 1 #include "mbed.h" // this tells us to load mbed related functions
Maggie17 2:3d87a559769a 2 #include "Servo.h" // library for the Servo
Maggie17 2:3d87a559769a 3 #include "DHT22.h" // library for the Temp&Humidity sensor
nprobably 0:671eadfdf703 4
Maggie17 2:3d87a559769a 5 DigitalOut myled(LED1); // used as an output for the sensor
Maggie17 4:c778b9ed6508 6 Servo myservo(p10); // p10 works, using other pins is possible too
Maggie17 2:3d87a559769a 7 DHT22 sensor(p6); // the pin of the connected grove port
mbedAustin 5:86adb825bfd2 8 Ticker fan;
mbedAustin 5:86adb825bfd2 9
mbedAustin 5:86adb825bfd2 10 void fanFunction()
mbedAustin 5:86adb825bfd2 11 {
mbedAustin 5:86adb825bfd2 12 // YOUR CODE HERE: read the sensor, set temp and hum variables
mbedAustin 5:86adb825bfd2 13 myservo = !myservo;
mbedAustin 5:86adb825bfd2 14 }
nprobably 0:671eadfdf703 15
mbedAustin 5:86adb825bfd2 16 // this code runs when the microcontroller starts up
mbedAustin 5:86adb825bfd2 17 int main()
mbedAustin 5:86adb825bfd2 18 {
nprobably 0:671eadfdf703 19 bool status;
mbedAustin 5:86adb825bfd2 20 float temp = 0;
mbedAustin 5:86adb825bfd2 21 float hum = 0;
mbedAustin 5:86adb825bfd2 22
Maggie17 2:3d87a559769a 23 // spin a main loop all the time
nprobably 0:671eadfdf703 24 while (1) {
mbedAustin 5:86adb825bfd2 25 // led hearbeat
mbedAustin 5:86adb825bfd2 26 myled = !myled;
mbedAustin 5:86adb825bfd2 27 status = sensor.sample();
mbedAustin 5:86adb825bfd2 28
Maggie17 2:3d87a559769a 29 // sensor checksum successful
nprobably 0:671eadfdf703 30 if (status) {
Maggie17 3:98645a154332 31 // printf the temperature and humidity from the sensor
mbedAustin 5:86adb825bfd2 32 temp = sensor.getTemperature()/10.0f;
mbedAustin 5:86adb825bfd2 33 hum = sensor.getHumidity()/10.0f;
mbedAustin 5:86adb825bfd2 34 printf("Temperature is %f C \r\n", temp);
mbedAustin 5:86adb825bfd2 35 printf("Humidity is %f \r\n", hum);
mbedAustin 5:86adb825bfd2 36
mbedAustin 5:86adb825bfd2 37 // start fanning if temperature > 25C or humidity > 90%
mbedAustin 5:86adb825bfd2 38 if(temp > 25 && hum > 80) {
mbedAustin 5:86adb825bfd2 39 printf("Starting Fan! \r\n");
mbedAustin 5:86adb825bfd2 40 fan.attach(fanFunction,0.5);
mbedAustin 5:86adb825bfd2 41 } else {
mbedAustin 5:86adb825bfd2 42 printf("Stopping Fan! \r\n");
mbedAustin 5:86adb825bfd2 43 fan.detach();
mbedAustin 5:86adb825bfd2 44 }
Maggie17 2:3d87a559769a 45 } else { // sensor checksum failed
mbedAustin 5:86adb825bfd2 46 printf("Error reading sample \r\n");
nprobably 0:671eadfdf703 47 }
mbedAustin 5:86adb825bfd2 48 wait(2.0f);
nprobably 0:671eadfdf703 49 }
nprobably 0:671eadfdf703 50 }