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 |
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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 |
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HealthThermometerService ( BLE &_ble, float initialTemp, uint8_t _location) | |
Add the Health Thermometer Service to an existing
BLE
object, initialize with temperature and location.
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void | updateTemperature (float temperature) |
Update the temperature being broadcast.
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void | updateLocation ( SensorLocation_t loc) |
Update the location.
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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:
- 8:63addc0221e7
- Parent:
- 4:83c07b0e93d6
- Child:
- 10:9a7e23066427
--- a/main.cpp Tue Dec 09 09:07:37 2014 +0000 +++ b/main.cpp Tue Dec 09 22:23:42 2014 +0000 @@ -17,49 +17,25 @@ #include "mbed.h" #include "BLEDevice.h" #include "HealthThermometerService.h" -#include "DHT.h" BLEDevice ble; DigitalOut led1(LED1); -DHT sensor(D10, DHT11); - -#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console; - * it will have an impact on code-size and power consumption. */ - -#if NEED_CONSOLE_OUTPUT -Serial pc(USBTX, USBRX); -#define DEBUG(...) { pc.printf(__VA_ARGS__); } -#else -#define DEBUG(...) /* nothing */ -#endif /* #if NEED_CONSOLE_OUTPUT */ const static char DEVICE_NAME[] = "Therm"; static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE}; static volatile bool triggerSensorPolling = false; +/* Restart Advertising on disconnection*/ void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason) { - DEBUG("Disconnected handle %u!\n\r", handle); - DEBUG("Restarting the advertising process\n\r"); ble.startAdvertising(); } -void periodicCallback(void) -{ - led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ - - /* Note that the periodicCallback() executes in interrupt context, so it is safer to do - * heavy-weight sensor polling from the main thread. */ - triggerSensorPolling = true; -} - int main(void) { led1 = 1; - Ticker ticker; - ticker.attach(periodicCallback, 1); - - DEBUG("Initialising the nRF51822\n\r"); + + /* Initialize BLE baselayer*/ ble.init(); ble.onDisconnection(disconnectionCallback); @@ -70,27 +46,18 @@ ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */ - ble.startAdvertising(); + /* setup Thermometer*/ float initialTemperature = 39.6; HealthThermometerService thermometerService(ble, initialTemperature, HealthThermometerService::LOCATION_EAR); - int error = 0; - float c = 0.0f; - - while (true) { - if (triggerSensorPolling) { - triggerSensorPolling = false; + /* Start Advertising*/ + ble.startAdvertising(); - /* Do blocking calls or whatever is necessary for sensor polling. */ - /* In our case, we simply update the dummy HRM measurement. */ - error = sensor.readData(); - if (!error) { - c = sensor.ReadTemperature(CELCIUS); - thermometerService.updateTemperature(c); - } - } else { - ble.waitForEvent(); - } + /* incriment temperature by 1 degree every second*/ + while (true) { + thermometerService.updateTemperature((initialTemperature++)); + wait(2); + led1 = !led1; /* Flash LED*/ } }