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 |
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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.
|
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:
- 2014-09-03
- Revision:
- 2:a34d554282b0
- Parent:
- 1:2deb859ed1a3
- Child:
- 4:83c07b0e93d6
File content as of revision 2:a34d554282b0:
/* 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 "BLEDevice.h" #include "HealthThermometerService.h" #include "DHT.h" BLEDevice ble; DHT sensor(D10, DHT11); #define NEED_CONSOLE_OUTPUT 1 /* 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; 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) { /* 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) { Ticker ticker; ticker.attach(periodicCallback, 3); DEBUG("Initialising the nRF51822\n\r"); ble.init(); ble.onDisconnection(disconnectionCallback); /* setup advertising */ ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); ble.accumulateAdvertisingPayload(GapAdvertisingData::THERMOMETER_EAR); 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(); float initialTemperature = 39.6; HealthThermometerService thermometerService(ble, initialTemperature, HealthThermometerService::LOCATION_EAR); while (true) { if (triggerSensorPolling) { triggerSensorPolling = false; wait(2); /* Do blocking calls or whatever is necessary for sensor polling. */ /* In our case, we simply update the dummy HRM measurement. */ int error = sensor.readData(); DEBUG("sensor read returned %d\r\n", error); if (!error) { thermometerService.updateTemperature(sensor.ReadTemperature(CELCIUS)); } } else { ble.waitForEvent(); } } }