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@17:9ce6c0171634, 2016-09-20 (annotated)

Committer:
Vincent Coubard
Date:
Tue Sep 20 13:47:58 2016 +0100
Revision:
17:9ce6c0171634
Parent:
15:57860d1cd14d 
Update the libraries.

Add st shield support.

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"
andresag 15:57860d1cd14d 18 #include "ble/BLE.h"
andresag 15:57860d1cd14d 19 #include "ble/services/HealthThermometerService.h"
rgrover1 0:d01bde90471b 20
rgrover1 4:83c07b0e93d6 21 DigitalOut led1(LED1);
rgrover1 0:d01bde90471b 22
andresag 15:57860d1cd14d 23 static HealthThermometerService *thermometerServicePtr;
andresag 15:57860d1cd14d 24
andresag 15:57860d1cd14d 25 static const char DEVICE_NAME[] = "Therm";
rgrover1 0:d01bde90471b 26 static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE};
rgrover1 0:d01bde90471b 27 static volatile bool triggerSensorPolling = false;
andresag 15:57860d1cd14d 28 static float currentTemperature = 39.6;
rgrover1 0:d01bde90471b 29
mbedAustin 8:63addc0221e7 30 /* Restart Advertising on disconnection*/
rgrover1 14:677ef88025b8 31 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
rgrover1 0:d01bde90471b 32 {
andresag 15:57860d1cd14d 33 BLE::Instance().gap().startAdvertising();
rgrover1 0:d01bde90471b 34 }
rgrover1 0:d01bde90471b 35
rgrover1 10:9a7e23066427 36 void periodicCallback(void)
rgrover1 10:9a7e23066427 37 {
rgrover1 10:9a7e23066427 38 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 10:9a7e23066427 39
rgrover1 10:9a7e23066427 40 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
rgrover1 10:9a7e23066427 41 * heavy-weight sensor polling from the main thread. */
rgrover1 10:9a7e23066427 42 triggerSensorPolling = true;
rgrover1 10:9a7e23066427 43 }
rgrover1 10:9a7e23066427 44
andresag 15:57860d1cd14d 45 /**
andresag 15:57860d1cd14d 46 * This function is called when the ble initialization process has failed
andresag 15:57860d1cd14d 47 */
andresag 15:57860d1cd14d 48 void onBleInitError(BLE &ble, ble_error_t error)
rgrover1 0:d01bde90471b 49 {
andresag 15:57860d1cd14d 50 /* Avoid compiler warnings */
andresag 15:57860d1cd14d 51 (void) ble;
andresag 15:57860d1cd14d 52 (void) error;
andresag 15:57860d1cd14d 53 /* Initialization error handling should go here */
andresag 15:57860d1cd14d 54 }
rgrover1 10:9a7e23066427 55
andresag 15:57860d1cd14d 56 /**
andresag 15:57860d1cd14d 57 * Callback triggered when the ble initialization process has finished
andresag 15:57860d1cd14d 58 */
andresag 15:57860d1cd14d 59 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
andresag 15:57860d1cd14d 60 {
andresag 15:57860d1cd14d 61 BLE& ble = params->ble;
andresag 15:57860d1cd14d 62 ble_error_t error = params->error;
andresag 15:57860d1cd14d 63
andresag 15:57860d1cd14d 64 if (error != BLE_ERROR_NONE) {
andresag 15:57860d1cd14d 65 /* In case of error, forward the error handling to onBleInitError */
andresag 15:57860d1cd14d 66 onBleInitError(ble, error);
andresag 15:57860d1cd14d 67 return;
andresag 15:57860d1cd14d 68 }
andresag 15:57860d1cd14d 69
andresag 15:57860d1cd14d 70 /* Ensure that it is the default instance of BLE */
andresag 15:57860d1cd14d 71 if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
andresag 15:57860d1cd14d 72 return;
andresag 15:57860d1cd14d 73 }
andresag 15:57860d1cd14d 74
rgrover1 13:30f6f65629b5 75 ble.gap().onDisconnection(disconnectionCallback);
rgrover1 0:d01bde90471b 76
rgrover1 10:9a7e23066427 77 /* Setup primary service. */
andresag 15:57860d1cd14d 78 thermometerServicePtr = new HealthThermometerService(ble, currentTemperature, HealthThermometerService::LOCATION_EAR);
rgrover1 10:9a7e23066427 79
rgrover1 0:d01bde90471b 80 /* setup advertising */
rgrover1 13:30f6f65629b5 81 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
rgrover1 13:30f6f65629b5 82 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
rgrover1 13:30f6f65629b5 83 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::THERMOMETER_EAR);
rgrover1 13:30f6f65629b5 84 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
rgrover1 13:30f6f65629b5 85 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 13:30f6f65629b5 86 ble.gap().setAdvertisingInterval(1000); /* 1000ms */
andresag 15:57860d1cd14d 87 ble.gap().startAdvertising();
andresag 15:57860d1cd14d 88 }
andresag 15:57860d1cd14d 89
andresag 15:57860d1cd14d 90 int main(void)
andresag 15:57860d1cd14d 91 {
andresag 15:57860d1cd14d 92 led1 = 1;
andresag 15:57860d1cd14d 93 Ticker ticker;
andresag 15:57860d1cd14d 94 ticker.attach(periodicCallback, 1);
andresag 15:57860d1cd14d 95
andresag 15:57860d1cd14d 96 BLE &ble = BLE::Instance();
andresag 15:57860d1cd14d 97 ble.init(bleInitComplete);
andresag 15:57860d1cd14d 98
andresag 15:57860d1cd14d 99 /* SpinWait for initialization to complete. This is necessary because the
andresag 15:57860d1cd14d 100 * BLE object is used in the main loop below. */
andresag 15:57860d1cd14d 101 while (ble.hasInitialized() == false) { /* spin loop */ }
rgrover1 0:d01bde90471b 102
mbedAustin 8:63addc0221e7 103 while (true) {
andresag 15:57860d1cd14d 104 if (triggerSensorPolling && ble.gap().getState().connected) {
rgrover1 10:9a7e23066427 105 triggerSensorPolling = false;
rgrover1 10:9a7e23066427 106
rgrover1 10:9a7e23066427 107 /* In our case, we simply update the dummy temperature measurement. */
rgrover1 10:9a7e23066427 108 currentTemperature += 0.1;
andresag 15:57860d1cd14d 109 thermometerServicePtr->updateTemperature(currentTemperature);
rgrover1 10:9a7e23066427 110 } else {
rgrover1 10:9a7e23066427 111 ble.waitForEvent();
rgrover1 10:9a7e23066427 112 }
rgrover1 0:d01bde90471b 113 }
rgrover1 0:d01bde90471b 114 }