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
main.cpp
- Committer:
- rgrover1
- Date:
- 2015-09-29
- Revision:
- 14:677ef88025b8
- Parent:
- 13:30f6f65629b5
- Child:
- 15:57860d1cd14d
File content as of revision 14:677ef88025b8:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed.h" #include "BLE.h" #include "HealthThermometerService.h" BLE ble; DigitalOut led1(LED1); 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(const Gap::DisconnectionCallbackParams_t *params) { ble.gap().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); ble.init(); ble.gap().onDisconnection(disconnectionCallback); /* Setup primary service. */ float currentTemperature = 39.6; HealthThermometerService thermometerService(ble, currentTemperature, HealthThermometerService::LOCATION_EAR); /* setup advertising */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::THERMOMETER_EAR); 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(); while (true) { if (triggerSensorPolling && ble.getGapState().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); } else { ble.waitForEvent(); } } }