An example of creating and updating a simple GATT Service using the BLE_API
Dependencies: BLE_API X_NUCLEO_IDB0XA1 mbed
main.cpp
- Committer:
- apalmieri
- Date:
- 2016-09-16
- Revision:
- 10:49c15c461749
- Parent:
- 7:15e13a8f1193
File content as of revision 10:49c15c461749:
/* mbed Microcontroller Library * Copyright (c) 2006-2014 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 "BLE.h" #include "BatteryService.h" DigitalOut led1(LED1, 1); const static char DEVICE_NAME[] = "BATTERY"; static const uint16_t uuid16_list[] = {GattService::UUID_BATTERY_SERVICE}; static volatile bool triggerSensorPolling = false; void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) { (void)params; BLE::Instance().gap().startAdvertising(); // restart advertising } void blink(void) { led1 = !led1; triggerSensorPolling = true; } void onBleInitError(BLE &ble, ble_error_t error) { (void)ble; (void)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); uint8_t batteryLevel = 50; BatteryService batteryService(ble, batteryLevel); /* setup advertising */ ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED); ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *) uuid16_list, sizeof(uuid16_list)); ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *) DEVICE_NAME, sizeof(DEVICE_NAME)); ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.setAdvertisingInterval(1000); /* 1000ms; in multiples of 0.625ms. */ ble.startAdvertising(); while (true) { // check for trigger from periodicCallback() if (triggerSensorPolling && ble.getGapState().connected) { triggerSensorPolling = false; // the magic battery processing batteryLevel++; if (batteryLevel > 100) { batteryLevel = 20; } batteryService.updateBatteryLevel(batteryLevel); } else { ble.waitForEvent(); // low power wait for event } } } int main(void) { Ticker t; t.attach(blink, 1.0f); BLE::Instance().init(bleInitComplete); }