Bluetooth Low Energy / Mbed 2 deprecated BLE_Thermometer Featured

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
BLE_API - HealthThermometerService Class Reference

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

main.cpp@2:a34d554282b0, 2014-09-03 (annotated)

Committer:
rgrover1
Date:
Wed Sep 03 16:25:50 2014 +0000
Revision:
2:a34d554282b0
Parent:
1:2deb859ed1a3
Child:
4:83c07b0e93d6
fix the UUID for the service; needs to be HealthThermometer.; Also enabled debugging. will revert this shortly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 0:d01bde90471b 1 /* mbed Microcontroller Library
rgrover1 0:d01bde90471b 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 0:d01bde90471b 3 *
rgrover1 0:d01bde90471b 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 0:d01bde90471b 5 * you may not use this file except in compliance with the License.
rgrover1 0:d01bde90471b 6 * You may obtain a copy of the License at
rgrover1 0:d01bde90471b 7 *
rgrover1 0:d01bde90471b 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 0:d01bde90471b 9 *
rgrover1 0:d01bde90471b 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 0:d01bde90471b 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 0:d01bde90471b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 0:d01bde90471b 13 * See the License for the specific language governing permissions and
rgrover1 0:d01bde90471b 14 * limitations under the License.
rgrover1 0:d01bde90471b 15 */
rgrover1 0:d01bde90471b 16
rgrover1 0:d01bde90471b 17 #include "mbed.h"
rgrover1 0:d01bde90471b 18 #include "BLEDevice.h"
rgrover1 0:d01bde90471b 19 #include "HealthThermometerService.h"
rgrover1 0:d01bde90471b 20 #include "DHT.h"
rgrover1 0:d01bde90471b 21
rgrover1 0:d01bde90471b 22 BLEDevice ble;
rgrover1 0:d01bde90471b 23 DHT sensor(D10, DHT11);
rgrover1 0:d01bde90471b 24
rgrover1 2:a34d554282b0 25 #define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
rgrover1 0:d01bde90471b 26 * it will have an impact on code-size and power consumption. */
rgrover1 0:d01bde90471b 27
rgrover1 0:d01bde90471b 28 #if NEED_CONSOLE_OUTPUT
rgrover1 0:d01bde90471b 29 Serial pc(USBTX, USBRX);
rgrover1 0:d01bde90471b 30 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
rgrover1 0:d01bde90471b 31 #else
rgrover1 0:d01bde90471b 32 #define DEBUG(...) /* nothing */
rgrover1 0:d01bde90471b 33 #endif /* #if NEED_CONSOLE_OUTPUT */
rgrover1 0:d01bde90471b 34
rgrover1 0:d01bde90471b 35 const static char DEVICE_NAME[] = "Therm";
rgrover1 0:d01bde90471b 36 static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE};
rgrover1 0:d01bde90471b 37 static volatile bool triggerSensorPolling = false;
rgrover1 0:d01bde90471b 38
rgrover1 1:2deb859ed1a3 39 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
rgrover1 0:d01bde90471b 40 {
rgrover1 0:d01bde90471b 41 DEBUG("Disconnected handle %u!\n\r", handle);
rgrover1 0:d01bde90471b 42 DEBUG("Restarting the advertising process\n\r");
rgrover1 0:d01bde90471b 43 ble.startAdvertising();
rgrover1 0:d01bde90471b 44 }
rgrover1 0:d01bde90471b 45
rgrover1 0:d01bde90471b 46 void periodicCallback(void)
rgrover1 0:d01bde90471b 47 {
rgrover1 0:d01bde90471b 48 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 0:d01bde90471b 49 * heavy-weight sensor polling from the main thread. */
rgrover1 0:d01bde90471b 50 triggerSensorPolling = true;
rgrover1 0:d01bde90471b 51 }
rgrover1 0:d01bde90471b 52
rgrover1 0:d01bde90471b 53 int main(void)
rgrover1 0:d01bde90471b 54 {
rgrover1 0:d01bde90471b 55 Ticker ticker;
rgrover1 2:a34d554282b0 56 ticker.attach(periodicCallback, 3);
rgrover1 0:d01bde90471b 57
rgrover1 0:d01bde90471b 58 DEBUG("Initialising the nRF51822\n\r");
rgrover1 0:d01bde90471b 59 ble.init();
rgrover1 0:d01bde90471b 60 ble.onDisconnection(disconnectionCallback);
rgrover1 0:d01bde90471b 61
rgrover1 0:d01bde90471b 62 /* setup advertising */
rgrover1 0:d01bde90471b 63 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 0:d01bde90471b 64 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 0:d01bde90471b 65 ble.accumulateAdvertisingPayload(GapAdvertisingData::THERMOMETER_EAR);
rgrover1 0:d01bde90471b 66 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 0:d01bde90471b 67 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 0:d01bde90471b 68 ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */
rgrover1 0:d01bde90471b 69 ble.startAdvertising();
rgrover1 0:d01bde90471b 70
rgrover1 0:d01bde90471b 71 float initialTemperature = 39.6;
rgrover1 0:d01bde90471b 72 HealthThermometerService thermometerService(ble, initialTemperature, HealthThermometerService::LOCATION_EAR);
rgrover1 0:d01bde90471b 73
rgrover1 0:d01bde90471b 74 while (true) {
rgrover1 0:d01bde90471b 75 if (triggerSensorPolling) {
rgrover1 0:d01bde90471b 76 triggerSensorPolling = false;
rgrover1 0:d01bde90471b 77
rgrover1 2:a34d554282b0 78 wait(2);
rgrover1 2:a34d554282b0 79
rgrover1 0:d01bde90471b 80 /* Do blocking calls or whatever is necessary for sensor polling. */
rgrover1 0:d01bde90471b 81 /* In our case, we simply update the dummy HRM measurement. */
rgrover1 1:2deb859ed1a3 82 int error = sensor.readData();
rgrover1 2:a34d554282b0 83 DEBUG("sensor read returned %d\r\n", error);
rgrover1 0:d01bde90471b 84 if (!error) {
rgrover1 1:2deb859ed1a3 85 thermometerService.updateTemperature(sensor.ReadTemperature(CELCIUS));
rgrover1 0:d01bde90471b 86 }
rgrover1 0:d01bde90471b 87 } else {
rgrover1 0:d01bde90471b 88 ble.waitForEvent();
rgrover1 0:d01bde90471b 89 }
rgrover1 0:d01bde90471b 90 }
rgrover1 0:d01bde90471b 91 }