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
Diff: main.cpp
- Revision:
- 15:57860d1cd14d
- Parent:
- 14:677ef88025b8
--- 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(); }