Revision 18:922b1ad5c826, committed 2014-11-05

Comitter:

nebgnahz

Date:

Wed Nov 05 08:49:02 2014 +0000

Parent:

17:97c355870263

Commit message:

Simple WiFi demo.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebSocketClient.lib	Wed Nov 05 08:49:02 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/samux/code/WebSocketClient/#4567996414a5

--- a/main.cpp	Mon Oct 20 17:10:46 2014 +0000
+++ b/main.cpp	Wed Nov 05 08:49:02 2014 +0000
@@ -13,10 +13,15 @@
  * - HTTPClient (http://developer.mbed.org/users/donatien/code/HTTPClient/)
  */
 
-#include "mbed.h"
+#include <string>
+
 #include "cc3000.h"
+#include "mbed.h"
 #include "HTTPClient.h"
 
+const string POLLING_URL = "http://universe.eecs.berkeley.edu:8080/value";
+const string UPDATE_URL = "http://universe.eecs.berkeley.edu:8080/update?value=";
+
 // KL25Z wifi connection
 // we need to define connection pins for:
 // - IRQ      => (pin D3)
@@ -38,48 +43,72 @@
 
 // setup the serial connection, and LEDs
 Serial pc(USBTX, USBRX);
-DigitalOut led_red(LED_RED);
 DigitalOut led_green(LED_GREEN);
+PwmOut led_red(LED_RED);
+
+Ticker reportSensorTicker;
+bool shouldReadSensor;
+int sensorData;
+
+void readSensor() {
+    // avoid doing much work here (in the interrupt).
+    // put the actual sensor reading in the main function
+    shouldReadSensor = true;
+}
 
 int main() {
-  // by default, it's red
-  led_red = 0;
-  led_green = 1;
-
-  // print message to indicate the program has started
-  pc.printf("CC3000 Sample Program\r\n");
-  wifi.init();
+    pc.printf("CC3000 Nodejs Demo Starts\r\n");
+    // by default, we make the LED red
+    led_red = 0;
+    led_green = 1;
 
-  while(1) {
-    // continuosly check connection status
-    if(wifi.is_connected() == false) {
-      // try to connect
-      if (wifi.connect() == -1) {
-        pc.printf("Failed to connect."
-                  "Please verify connection details and try again.\r\n");
-      } else {
-        pc.printf("IP address: %s \r\n", wifi.getIPAddress());
+    // reset the readsensor bool to false so we don't read the data.
+    shouldReadSensor = false;
+    sensorData = 0;
+    // Every 5 second, we sample the sensor and report the data.
+    reportSensorTicker.attach(&readSensor, 5.0); 
+    
+    wifi.init();
+
+    while(1) {
+        // continuosly check connection status
+        if(wifi.is_connected() == false) {
+            // try to connect
+            if (wifi.connect() == -1) {
+                pc.printf("Failed to connect."
+                          "Please verify connection details and try again.\r\n");
+                continue;
+            } else {
 
-        //once connected, turn green LED on and red LED off
-        led_red = 1;
-        led_green = 0;
-      }
-    } else {
-      // get input url and then return the value
-      pc.printf("> ");
-      pc.scanf("%s", url);
+                pc.printf("IP address: %s \r\n", wifi.getIPAddress());
+                // once connected, turn green LED on and red LED off
+                led_red = 1;
+                led_green = 0;
+            }
+        }
 
-      int ret = http.get(url, str, 128);
-      if (!ret) {
-        pc.printf("Requested %s\r\n", url);
-        pc.printf("Page 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\r\n",
-                  ret,
-                  http.getHTTPResponseCode());
-      }
+        // update the value when shouldReadSensor is true          
+        if (shouldReadSensor == true) {
+            shouldReadSensor = false;
+            sensorData += 10;
+            char url[128];
+            snprintf(url, sizeof(url), "%s%d", UPDATE_URL.c_str(), sensorData);
+            int ret = http.get(url, str, 128);
+            if (!ret) {
+                pc.printf("sending sensorData %d, response: %s\r\n", sensorData, str);
+            } else {
+                pc.printf("[PUSH] Error - ret = %d - HTTP %d\r\n", ret, http.getHTTPResponseCode());
+            }
+        }
+        
+        // everytime we do HTTP polling
+        int ret = http.get(POLLING_URL.c_str(), str, 128);
+        if (!ret) {
+            int value = atoi(str);
+            led_red = 1.0 * value / 255;
+        } else {
+            pc.printf("[POLL] Error - ret = %d - HTTP %d\r\n", ret, http.getHTTPResponseCode());
+        }
+        wait(0.1);
     }
-  }
 }