Delta / Mbed 2 deprecated BLE_Glucose_Demo

Demo Glucose Service

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate by Bluetooth Low Energy

BLE_Glucose_demo implements the Glucose Service which enables a collector device to connect and interact with.

There is a brief sample code edited with Android Studio for demo this BLE_Glucose_demo example, and it is public on github, everyone can clone it by this URL: https://github.com/Marcomissyou/BluetoothLeGlucose.git. It is convenient for you to development your BLE idea.

There is also provided apk file so you can download and install it directly then demo this code, but make sure your Android phone supports Bluetooth 4.0. /media/uploads/Marcomissyou/bleglucoseservice.apk

Diff: main.cpp

Revision:
36:ea2a1b4f51c1
Parent:
35:ba3e3174331a
Child:
37:d310a72115c7
--- a/main.cpp	Fri Jul 11 11:07:25 2014 +0100
+++ b/main.cpp	Fri Jul 11 11:12:42 2014 +0100
@@ -50,6 +50,9 @@
 
 static const uint16_t uuid16_list[] = {GattService::UUID_HEART_RATE_SERVICE};
 
+static volatile bool triggerSensorPolling = false; /* set to high periodically to indicate to the main thread that
+                                                    * polling is necessary. */
+
 void disconnectionCallback(Gap::Handle_t handle)
 {
     DEBUG("Disconnected handle %u!\n\r", handle);
@@ -58,23 +61,15 @@
 }
 
 /**
- * Triggered periodically by the 'ticker' interrupt; updates hrmCounter.
+ * Triggered periodically by the 'ticker' interrupt.
  */
 void periodicCallback(void)
 {
     led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
-
-    if (ble.getGapState().connected) {
-        /* Update the HRM measurement */
-        /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
-        /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
-        hrmCounter++;
-        if (hrmCounter == 175) {
-            hrmCounter = 100;
-        }
-        bpm[1] = hrmCounter;
-        ble.updateCharacteristicValue(hrmRate.getHandle(), bpm, sizeof(bpm));
-    }
+    triggerSensorPolling = true; /* Note that the periodicCallback() executes in
+                                  * interrupt context, so it is safer to do
+                                  * heavy-weight sensor polling from the main
+                                  * thread.*/
 }
 
 int main(void)
@@ -99,6 +94,24 @@
     ble.addService(hrmService);
 
     while (true) {
-        ble.waitForEvent();
+        if (triggerSensorPolling) {
+            triggerSensorPolling = false;
+
+            /* Do blocking calls or whatever is necessary for sensor polling. */
+            /* In our case, we simply update the dummy HRM measurement. */
+            hrmCounter++;
+            if (hrmCounter == 175) {
+                hrmCounter = 100;
+            }
+
+            if (ble.getGapState().connected) {
+                /* First byte = 8-bit values, no extra info, Second byte = uint8_t HRM value */
+                /* See --> https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml */
+                bpm[1] = hrmCounter;
+                ble.updateCharacteristicValue(hrmRate.getHandle(), bpm, sizeof(bpm));
+            }
+        } else {
+            ble.waitForEvent();
+        }
     }
 }