Shigenori Inoue / Mbed 2 deprecated DHT11_Hello_World

Example of my library for the DHT11 temperature and humidity sendor

Dependencies:   DHT11 TextLCD mbed

main.cpp@0:da7b1c04a659, 2014-09-11 (annotated)

Committer:
s_inoue_mbed
Date:
Thu Sep 11 13:50:10 2014 +0000
Revision:
0:da7b1c04a659
Example of my library for the DHT11 temperature and humidity sendor

Who changed what in which revision?

UserRevisionLine numberNew contents of line
s_inoue_mbed 0:da7b1c04a659 1 /*
s_inoue_mbed 0:da7b1c04a659 2 * A program for the use of the DHT11, a temperature and humidity sensor
s_inoue_mbed 0:da7b1c04a659 3 * Shigenori Inoue, September 10, 2014
s_inoue_mbed 0:da7b1c04a659 4 */
s_inoue_mbed 0:da7b1c04a659 5
s_inoue_mbed 0:da7b1c04a659 6 #include "mbed.h"
s_inoue_mbed 0:da7b1c04a659 7 #include "TextLCD.h"
s_inoue_mbed 0:da7b1c04a659 8 #include "DHT11.h"
s_inoue_mbed 0:da7b1c04a659 9
s_inoue_mbed 0:da7b1c04a659 10 // LEDs for debugging
s_inoue_mbed 0:da7b1c04a659 11 BusOut leds(LED4, LED3, LED2, LED1);
s_inoue_mbed 0:da7b1c04a659 12
s_inoue_mbed 0:da7b1c04a659 13 // LCD module
s_inoue_mbed 0:da7b1c04a659 14 TextLCD lcd(p25, p24, p12, p13, p14, p23);
s_inoue_mbed 0:da7b1c04a659 15
s_inoue_mbed 0:da7b1c04a659 16 // Humidity sensor
s_inoue_mbed 0:da7b1c04a659 17 DHT11 d(p18);
s_inoue_mbed 0:da7b1c04a659 18
s_inoue_mbed 0:da7b1c04a659 19 // The main function
s_inoue_mbed 0:da7b1c04a659 20 int main()
s_inoue_mbed 0:da7b1c04a659 21 {
s_inoue_mbed 0:da7b1c04a659 22 int state;
s_inoue_mbed 0:da7b1c04a659 23
s_inoue_mbed 0:da7b1c04a659 24 lcd.cls();
s_inoue_mbed 0:da7b1c04a659 25 lcd.locate(0, 0);
s_inoue_mbed 0:da7b1c04a659 26 lcd.printf("DHT11 Humidity");
s_inoue_mbed 0:da7b1c04a659 27
s_inoue_mbed 0:da7b1c04a659 28 while(true) {
s_inoue_mbed 0:da7b1c04a659 29 state = d.readData();
s_inoue_mbed 0:da7b1c04a659 30
s_inoue_mbed 0:da7b1c04a659 31 if (state != DHT11::OK) {
s_inoue_mbed 0:da7b1c04a659 32 lcd.locate(0, 1);
s_inoue_mbed 0:da7b1c04a659 33 lcd.printf("Error: %d", state);
s_inoue_mbed 0:da7b1c04a659 34 } else {
s_inoue_mbed 0:da7b1c04a659 35 lcd.locate(0, 1);
s_inoue_mbed 0:da7b1c04a659 36 lcd.printf("T: %dC, H: %d%%", d.readTemperature(), d.readHumidity());
s_inoue_mbed 0:da7b1c04a659 37 }
s_inoue_mbed 0:da7b1c04a659 38 leds = leds + 1;
s_inoue_mbed 0:da7b1c04a659 39 wait(2.0);
s_inoue_mbed 0:da7b1c04a659 40 }
s_inoue_mbed 0:da7b1c04a659 41 }