znrobotics 智能工场 / Mbed 2 deprecated Seeed_Arch_link_ServoWithTempAndHumidity

How to control a servo with temp & humidity

Dependencies:   DHT22 Servo mbed

Fork of Program4_ServoWithTempAndHumidity by Robotics Kit Workshop

Seeed_Arch_link_ServoWithTempAndHumidity

Setup

  1. Connect the Temperature sensor as well as the Servo to the Seeeduino-Arch-Link board, and then connect the board to you PC using the micro-USB cable.
  2. The board mounts as a mass-storage device (like a USB drive). Verify that you can see it (drive name will be MBED).
  3. Go to http://developer.mbed.org
  4. Create an ARM mbed account if you do not have one.
  5. On the top right corner, click the Compiler button.

An IDE should open. Congratulations!

On Windows: To see debug messages, install the serial driver.

Debug messages: We can talk to the board via a serial port, but you might need some software. Read this doc and install required software (like PuTTY or CoolTermon Windows).

Locally: If you like things locally, you can do so by exporting to a supported toolchain.

I very much recommend to just use the online IDE, as it makes it easier for us, but if you want to continue hacking in the future, this is a nice way.

Seeed_Arch_link_ServoWithTempAndHumidity

  1. Go back to the compiler browser window and click F5 to refresh the page.
  2. Click the Import button, then click "Click Here to import from URL"
  3. Paste the URL https://developer.mbed.org/teams/znrobotics/code/Seeed_Arch_link_ServoWithTempAndHumidity/
  4. Double click to open main.cpp
  5. Here we intend to control the servo with temp & humidity
  6. Try to finish the code under' YOUR CODE HERE: to reverse myservo between 0 and 1 '
  1. Now press Compile
  2. A file downloads (Seeed_Arch_link_ServoWithTempAndHumidity.hex)
  3. Drag the file to the 'MBED' disk
  4. After flashing, hit the 'Reset' button to start the program.
  5. Now the servo will move based on the temperature reading! Try putting your finger on the temperature sensor to see it move!

main.cpp@6:14000499d474, 2016-05-28 (annotated)

Committer:
Maggie17
Date:
Sat May 28 09:37:28 2016 +0000
Revision:
6:14000499d474
Parent:
5:86adb825bfd2 
modify

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 {
Maggie17 6:14000499d474 12 // YOUR CODE HERE: to reverse myservo between 0 and 1
Maggie17 6:14000499d474 13
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 }