BLE Thermometer example
Dependencies: BSP_B-L475E-IOT01
This example is a fork of the following mbed-os example:
https://developer.mbed.org/teams/mbed-os-examples/code/mbed-os-example-ble-Thermometer/
Please read the documentation in this page.
Diff: source/main.cpp
- Revision:
- 0:a27dfda81620
- Child:
- 1:0802a5f8c9d3
diff -r 000000000000 -r a27dfda81620 source/main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/main.cpp Tue Jul 26 14:50:43 2016 +0100 @@ -0,0 +1,108 @@ +/* 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-events/events.h> +#include "mbed.h" +#include "ble/BLE.h" +#include "ble/services/HealthThermometerService.h" + +DigitalOut led1(LED1, 1); + +const static char DEVICE_NAME[] = "Therm"; +static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE}; + +static float currentTemperature = 39.6; +static HealthThermometerService *thermometerServicePtr; + +static EventQueue eventQueue( + /* event count */ 16 * /* event size */ 32 +); + +/* Restart Advertising on disconnection*/ +void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *) +{ + BLE::Instance().gap().startAdvertising(); +} + +void updateSensorValue(void) { + /* Do blocking calls or whatever is necessary for sensor polling. + In our case, we simply update the Temperature measurement. */ + currentTemperature = (currentTemperature + 0.1 > 43.0) ? 39.6 : currentTemperature + 0.1; + thermometerServicePtr->updateTemperature(currentTemperature); +} + +void periodicCallback(void) +{ + led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ + + if (BLE::Instance().gap().getState().connected) { + eventQueue.post(updateSensorValue); + } +} + +void onBleInitError(BLE &ble, ble_error_t error) +{ + /* Initialization error handling should go here */ +} + +void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) +{ + BLE& ble = params->ble; + ble_error_t error = params->error; + + if (error != BLE_ERROR_NONE) { + onBleInitError(ble, error); + return; + } + + if (ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { + return; + } + + ble.gap().onDisconnection(disconnectionCallback); + + /* Setup primary service. */ + thermometerServicePtr = new HealthThermometerService(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(); +} + +void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) { + BLE &ble = BLE::Instance(); + eventQueue.post(Callback<void()>(&ble, &BLE::processEvents)); +} + +int main() +{ + eventQueue.post_every(periodicCallback, 500); + + BLE &ble = BLE::Instance(); + ble.onEventsToProcess(scheduleBleEventsProcessing); + ble.init(bleInitComplete); + + while (true) { + eventQueue.dispatch(); + } + + return 0; +}