Diff: main.cpp

Revision:

0:4a9b07ff844f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jul 24 07:03:48 2013 +0000
@@ -0,0 +1,63 @@
+#include "mbed.h"
+#include "USBSerial.h"
+#include "DHT.h"
+#include "SSD1308.h"
+
+#define LOG(...)    serial.printf(__VA_ARGS__)
+
+BusOut leds(LED1, LED2, LED3, LED4);
+USBSerial serial;                    // USB serial to output debug message
+
+// Grove - Temperature & Humidity Pro is connected with UART Grove of Seeeduino Arch, uses P1_14
+DHT sensor(P1_14, DHT22);            
+
+// Grove - OLED 128x64 is connected with I2C Grove
+I2C i2c(P0_5, P0_4);    // SDA, SCL
+SSD1308 oled = SSD1308(i2c, SSD1308_SA0);
+
+int main() {
+    uint8_t count = 0;
+    char display_buf[8];
+    int  err;
+    float humidity;
+    float last_humidity = 0;
+    float temperature;
+    float last_temperature = 0;
+    
+    
+    LOG("------- Sense -------\n");
+    oled.writeString(0, 0, "---- Sense ----");
+    oled.writeString(2, 0, "Temperature:");
+    oled.writeString(5, 0, "Humidity:");
+    while(1) {
+        count++;
+        leds = count;
+
+        err = sensor.readData();
+        if (err == 0) {
+            temperature = sensor.ReadTemperature(CELCIUS);
+            if (temperature != last_temperature) {   // update temperature if changed
+                snprintf(display_buf, sizeof(display_buf), "%4.2f C", temperature);
+                oled.writeString(3, 0, display_buf);
+                last_temperature = temperature;
+            }
+            
+            humidity = sensor.ReadHumidity();
+            if (humidity != last_humidity) {
+                snprintf(display_buf, sizeof(display_buf), "%4.2f %%", humidity);
+                oled.writeString(6, 0, display_buf);
+                last_humidity = humidity;
+            }
+            
+            LOG("Temperature is %4.2f C \r\n",sensor.ReadTemperature(CELCIUS));
+            LOG("Temperature is %4.2f F \r\n",sensor.ReadTemperature(FARENHEIT));
+            LOG("Temperature is %4.2f K \r\n",sensor.ReadTemperature(KELVIN));
+            LOG("Humidity is %4.2f \r\n",sensor.ReadHumidity());
+            LOG("Dew point is %4.2f  \r\n",sensor.CalcdewPoint(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
+            LOG("Dew point (fast) is %4.2f  \r\n",sensor.CalcdewPointFast(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
+        } else
+            LOG("\r\nErr %i \n",err);
+            
+        wait(2);
+    }
+}