Bluetooth Low Energy
BLE demo for the Health-Thermometer service.
Dependencies: BLE_API mbed nRF51822 X_NUCLEO_IDB0XA1
This example demonstrates how to use the Health Thermometer Service. The Health Thermometer service reports two pieces of information, Temperature and Sensor Location.
API
Import library
Public Types |
|
| enum |
SensorLocation_t
{
LOCATION_ARMPIT = 1, LOCATION_BODY , LOCATION_EAR , LOCATION_FINGER , LOCATION_GI_TRACT , LOCATION_MOUTH , LOCATION_RECTUM , LOCATION_TOE , LOCATION_EAR_DRUM } |
Public Member Functions |
|
| HealthThermometerService ( BLE &_ble, float initialTemp, uint8_t _location) | |
|
Add the Health Thermometer Service to an existing
BLE
object, initialize with temperature and location.
|
|
| void | updateTemperature (float temperature) |
|
Update the temperature being broadcast.
|
|
| void | updateLocation ( SensorLocation_t loc) |
|
Update the location.
|
|
Technical Details
Further Technical Details can be found at the following links
- Temperature Service : Gatt profile details from bluetooth.org
- Temperature Measurement : Gatt Characteristic details
- Temperature Type : Gatt Characteristic details
Revision 15:57860d1cd14d, committed 2015-12-30
- Comitter:
- andresag
- Date:
- Wed Dec 30 09:41:47 2015 +0000
- Parent:
- 14:677ef88025b8
- Child:
- 16:19ee8df57b23
- Commit message:
- Update example to comply with latest BLE API changes.
Changed in this revision
--- a/BLE_API.lib Tue Sep 29 12:10:38 2015 +0000 +++ b/BLE_API.lib Wed Dec 30 09:41:47 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#d494ad3e87bd +http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#bfc5b9b6ecf5
--- a/main.cpp Tue Sep 29 12:10:38 2015 +0000
+++ b/main.cpp Wed Dec 30 09:41:47 2015 +0000
@@ -15,20 +15,22 @@
*/
#include "mbed.h"
-#include "BLE.h"
-#include "HealthThermometerService.h"
+#include "ble/BLE.h"
+#include "ble/services/HealthThermometerService.h"
-BLE ble;
DigitalOut led1(LED1);
-const static char DEVICE_NAME[] = "Therm";
+static HealthThermometerService *thermometerServicePtr;
+
+static const char DEVICE_NAME[] = "Therm";
static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE};
static volatile bool triggerSensorPolling = false;
+static float currentTemperature = 39.6;
/* Restart Advertising on disconnection*/
void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
{
- ble.gap().startAdvertising();
+ BLE::Instance().gap().startAdvertising();
}
void periodicCallback(void)
@@ -40,18 +42,40 @@
triggerSensorPolling = true;
}
-int main(void)
+/**
+ * This function is called when the ble initialization process has failed
+ */
+void onBleInitError(BLE &ble, ble_error_t error)
{
- led1 = 1;
- Ticker ticker;
- ticker.attach(periodicCallback, 1);
+ /* Avoid compiler warnings */
+ (void) ble;
+ (void) error;
+ /* Initialization error handling should go here */
+}
- ble.init();
+/**
+ * Callback triggered when the ble initialization process has finished
+ */
+void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
+{
+ BLE& ble = params->ble;
+ ble_error_t error = params->error;
+
+ if (error != BLE_ERROR_NONE) {
+ /* In case of error, forward the error handling to onBleInitError */
+ onBleInitError(ble, error);
+ return;
+ }
+
+ /* Ensure that it is the default instance of BLE */
+ if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
+ return;
+ }
+
ble.gap().onDisconnection(disconnectionCallback);
/* Setup primary service. */
- float currentTemperature = 39.6;
- HealthThermometerService thermometerService(ble, currentTemperature, HealthThermometerService::LOCATION_EAR);
+ thermometerServicePtr = new HealthThermometerService(ble, currentTemperature, HealthThermometerService::LOCATION_EAR);
/* setup advertising */
ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
@@ -60,21 +84,29 @@
ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
ble.gap().setAdvertisingInterval(1000); /* 1000ms */
- ble.gap().startAdvertising();
+ ble.gap().startAdvertising();
+}
+
+int main(void)
+{
+ led1 = 1;
+ Ticker ticker;
+ ticker.attach(periodicCallback, 1);
+
+ BLE &ble = BLE::Instance();
+ ble.init(bleInitComplete);
+
+ /* SpinWait for initialization to complete. This is necessary because the
+ * BLE object is used in the main loop below. */
+ while (ble.hasInitialized() == false) { /* spin loop */ }
while (true) {
- if (triggerSensorPolling && ble.getGapState().connected) {
+ if (triggerSensorPolling && ble.gap().getState().connected) {
triggerSensorPolling = false;
- /* Do blocking calls or whatever is necessary for sensor polling. */
- // error = sensor.readData();
- // if (!error) {
- // thermometerService.updateTemperature(c);
- // }
-
/* In our case, we simply update the dummy temperature measurement. */
currentTemperature += 0.1;
- thermometerService.updateTemperature(currentTemperature);
+ thermometerServicePtr->updateTemperature(currentTemperature);
} else {
ble.waitForEvent();
}
--- a/mbed.bld Tue Sep 29 12:10:38 2015 +0000 +++ b/mbed.bld Wed Dec 30 09:41:47 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/4f6c30876dfa \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/4336505e4b1c \ No newline at end of file
--- a/nRF51822.lib Tue Sep 29 12:10:38 2015 +0000 +++ b/nRF51822.lib Wed Dec 30 09:41:47 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#088f5738bf18 +http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#3cc0718d98d0