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.
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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
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?
User | Revision | Line number | New 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 | } |