Revision 3:cfc6ff08a668, committed 2015-07-02

Comitter:

Kevin_Lee

Date:

Thu Jul 02 10:05:43 2015 +0000

Parent:

2:8b304d2b4ca5

Commit message:

This is a demo to upload temperature info. to dweet.io

Changed in this revision

diff -r 8b304d2b4ca5 -r cfc6ff08a668 DHT.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT.lib	Thu Jul 02 10:05:43 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/teams/components/code/DHT/#df22ddf10d75

diff -r 8b304d2b4ca5 -r cfc6ff08a668 main.cpp
--- a/main.cpp	Tue Jun 30 07:28:24 2015 +0000
+++ b/main.cpp	Thu Jul 02 10:05:43 2015 +0000
@@ -3,11 +3,16 @@
 #include "BLE.h"
 #include "WIZnetInterface.h"
 #include "HTTPClient.h"
+#include "DHT.h"
+
+#define DHT22_Test 0
 
 #define USE_DHCP 0
 #define LOOPBACKPORT  5000
 int W5500_Test(void);
 
+float temperature_get();         /* Grove - Temperature Sensor V1.2 */
+
 SPI spi(SPI_PSELMOSI0, SPI_PSELMISO0, SPI_PSELSCK0);
 WIZnetInterface ethernet(&spi, p24, p17); // Spi ,cs, reset
 int ret, dummy, lv = 1;
@@ -22,6 +27,10 @@
 Serial pc(USBTX, USBRX);  /* uart */
 
 
+DHT dht22(A1,DHT22);
+
+AnalogIn   ain(A0);
+
 int main() {
     char buffer[256];
     wait(1);
@@ -29,63 +38,58 @@
     wait(1);
     printf("helloworld\r\n");
     
+    /*
+    float resistance = (float)(1023.0-val)*10000.0/(float)val;
+    float temp = 1/(log(resistance/10000)/B+1/298.15)-273.15;
+    */
+    
+#if DHT22_Test 
+    int result;
+    while(1) {
+        printf("dht22.readData()\r\n");
+        printf("ain A0: %.2f\r\n",ain.read());
+        printf("temperature_get %.2f\r\n",temperature_get());
+        result = dht22.readData();
+        printf("the result is %d.\r\n",result);
+        if(result == 0) {
+            printf("Temperature is %f.2 C\r\n",dht22.ReadTemperature(CELCIUS));
+            printf("Humidity is %f.2 \%\r\n",dht22.ReadHumidity());
+        }
+        wait(4);
+    }
+#endif   
+    
+    
     if(W5500_Test() == 0) {                  // Internet is ok
         printf("W5500 tested OK \r\n");
         
-    char str[512];
-    char get_msg[128]= "";
+        char str[512];
+        char get_msg[128]= "";
     
     /*
-        http://dweet.io/follow/nameYouWant
+        http://dweet.io/follow/ArchLink
     */
-    char nameYouWant[] = "nameYouWant";
-    while(1)
-    {
-//        sprintf(get_msg,"http://dweet.io/dweet/for/%s?a0=%d",nameYouWant,(int)(1000));
-
-        sprintf(get_msg,"http://seeedmsvps.cloudapp.net:10080/plantbox/upload_iot/");
-        HTTPClient http;
-        
-        pc.printf("Send post message to dweet.io\r\n");
-        pc.printf("msg : %s\r\n",get_msg);
-        ret = http.get(get_msg, str, sizeof(str));
-        if(!ret)
-        {
-          pc.printf("\r\nPage fetched successfully - read %d characters\r\n", strlen(str));
-          pc.printf("Result: %s\r\n", str);
-        }
-        else
+        char nameYouWant[] = "ArchLink";
+        while(1)
         {
-          pc.printf("Error - ret = %d - HTTP return code = %d\n", ret, http.getHTTPResponseCode());
-        }
-        wait(10);
-    }
-    
+            sprintf(get_msg,"http://dweet.io/dweet/for/%s?Temperature=%.2f",nameYouWant,temperature_get());
+            printf("temperature_get: %.2f",temperature_get());
+            HTTPClient http;
         
-        // TCPSocketServer server;
-        // server.bind(LOOPBACKPORT);
-        // server.listen();
-        // while(1) {
-            // printf("\nWait for new connection...\r\n");
-            // TCPSocketConnection client;
-            // server.accept(client);
-            // client.set_blocking(false,0); // Timeout = 0.
-            // printf("Connection from: %s\r\n",client.get_address());
-            // while (client.is_connected() == true) {
-                // int n = client.receive(buffer,sizeof(buffer));
-                // if (n > 0) {
-                    // client.send_all(buffer,n);
-                // } else {
-                // }
-                // if (client.is_fin_received()) {
-                    // client.close();
-                // } else {
-                // }
-                
-            // }
-            // printf("Disconnected.\r\n");
-            
-        // }
+            pc.printf("Send post message to dweet.io\r\n");
+            pc.printf("msg : %s\r\n",get_msg);
+            ret = http.get(get_msg, str, sizeof(str));
+            if(!ret)
+            {
+            pc.printf("\r\nPage fetched successfully - read %d characters\r\n", strlen(str));
+            pc.printf("Result: %s\r\n", str);
+            }
+            else
+            {
+            pc.printf("Error - ret = %d - HTTP return code = %d\n", ret, http.getHTTPResponseCode());
+            }
+            wait(10);
+       }
     }
     
     while(1) {
@@ -149,4 +153,15 @@
         }
         pc.printf("Disconnected.\r\n");
     }*/
-}
\ No newline at end of file
+}
+
+
+float temperature_get()
+{
+    int B = 3975;
+    float val = (ain.read()*1023);
+    float resistance = (float)(1023.0-val)*10000.0/(float)val;
+    float temp = 1/(log(resistance/10000)/B+1/298.15)-273.15;
+    return temp;
+}
+