An example to use an AM2303 (a.k.a. DHT22) humidity sensor
Dependencies: AM2303 TextLCD mbed
Revision 0:a1cd181526fc, committed 2014-10-13
- Comitter:
- s_inoue_mbed
- Date:
- Mon Oct 13 14:24:24 2014 +0000
- Commit message:
- An example program to use an AM2303 humidity sensor.
Changed in this revision
diff -r 000000000000 -r a1cd181526fc AM2303.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/AM2303.lib Mon Oct 13 14:24:24 2014 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/s_inoue_mbed/code/AM2303/#1ad0612823e9
diff -r 000000000000 -r a1cd181526fc TextLCD.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Mon Oct 13 14:24:24 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#308d188a2d3a
diff -r 000000000000 -r a1cd181526fc main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Oct 13 14:24:24 2014 +0000 @@ -0,0 +1,62 @@ +/* Copyright (c) 2014 Shigenori Inoue, MIT License + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software + * and associated documentation files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, publish, distribute, + * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or + * substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "mbed.h" +#include "TextLCD.h" +#include "AM2303.h" + +/* LEDs for debugging */ +BusOut leds(LED4, LED3, LED2, LED1); + +/* LCD module */ +TextLCD lcd(p25, p24, p12, p13, p14, p23); + +/* Humidity sensor */ +AM2303 h(p18); + +/* The main function */ +int main() +{ + /* Variables */ + int state; + + /* Show splash screen */ + lcd.cls(); + lcd.locate(0, 0); + lcd.printf("AM2303 Humidity"); + + /* Infinate loop */ + while(true) { + /* Wait for measurement */ + wait(2.0); + + /* Read the measured results */ + state = h.readData(); + + /* Show the data, otherwise error */ + lcd.locate(0, 1); + if (state != AM2303::OK) { + lcd.printf("<Error: %d>", state); + } else { + lcd.printf("T:%2.1fC, H:%2.1f%%", h.readTemperature(), h.readHumidity()); + } + + /* Blink LED for Debug */ + leds = leds + 1; + } +}
diff -r 000000000000 -r a1cd181526fc mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Oct 13 14:24:24 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1 \ No newline at end of file