An example to use an AM2303 (a.k.a. DHT22) humidity sensor

Dependencies:   AM2303 TextLCD mbed

Files at this revision

API Documentation at this revision

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

AM2303.lib Show annotated file Show diff for this revision Revisions of this file
TextLCD.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
--- /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
--- /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
--- /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;
+    }
+}
--- /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