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-/*
- * Author: Henry Bruce <[email protected]>
- * Copyright (c) 2016 Intel Corporation.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * This sample looks for a device that implements the Environmental Sensing
- * Service and supports temperatures notifications. It then starts notfication
- * updates and displays samples until CRTL+C is hit.
- * Sample has been tested with the following devices:
- * - Zephyr Environmental Sensing Profile sample running on Arduino 101
- */
-
-#include <tinyb.hpp>
-#include <tinyb/BluetoothException.hpp>
-#include <jau/basic_types.hpp>
-#include <vector>
-#include <algorithm>
-#include <iostream>
-#include <iomanip>
-#include <thread>
-#include <csignal>
-#include <condition_variable>
-
-using namespace tinyb;
-
-#define BT_MEAS_INTERVAL_INDEX 6
-
-struct es_measurement {
- uint16_t reserved;
- uint8_t sampling_func;
- uint32_t meas_period;
- uint32_t update_interval;
- uint8_t application;
- uint8_t meas_uncertainty;
-};
-
-
-const std::string BT_UUID_ESS = "0000181a-0000-1000-8000-00805f9b34fb";
-const std::string BT_UUID_CUD = "00002901-0000-1000-8000-00805f9b34fb";
-const std::string BT_UUID_TEMPERATURE = "00002a6e-0000-1000-8000-00805f9b34fb";
-const std::string BT_UUID_MEASUREMENT = "0000290c-0000-1000-8000-00805f9b34fb";
-const std::string BT_NOFITY_FLAG = "notify";
-
-std::condition_variable cv;
-
-
-static void signal_handler(int signum)
-{
- if (signum == SIGINT) {
- cv.notify_all();
- }
-}
-
-
-static void wait_ctrl_c()
-{
- std::mutex m;
- std::unique_lock<std::mutex> lock(m);
- std::signal(SIGINT, signal_handler);
- cv.wait(lock);
-}
-
-
-void data_callback(BluetoothGattCharacteristic &c, std::vector<unsigned char> &data, void *userdata)
-{
- (void)c;
- (void)userdata;
- // unsigned char *data_c;
- unsigned int size = data.size();
- if (size == 2) {
- jau::packed_t<int16_t>* raw_data = reinterpret_cast<jau::packed_t<int16_t>*>( data.data() );
- // int16_t* raw_data = reinterpret_cast<int16_t*>(data.data());
- std::cout << "Raw data = " << std::hex << std::setfill('0') << std::setw(4) << raw_data->store << ". ";
- uint16_t temp = (raw_data->store + 50) / 100;
- std::cout << "Temperature = " << std::dec << temp << "C " << std::endl;
- }
-}
-
-
-/** This program reads the temperature from a device running the Environmental Sensing Senvice.
- */
-int main(int argc, char **argv)
-{
- (void)argc;
- (void)argv;
- BluetoothManager *manager = nullptr;
- try {
- manager = BluetoothManager::get_bluetooth_manager();
- } catch(const std::runtime_error& e) {
- std::cerr << "Error while initializing libtinyb: " << e.what() << std::endl;
- exit(1);
- }
-
- std::unique_ptr<BluetoothAdapter> adapter = manager->get_default_adapter();
- BluetoothDevice *ess_device = NULL;
-
- // Start the discovery of devices */
- bool ret = manager->start_discovery();
- if (!ret) {
- std::cout << "Failed to start discovery" << std::endl;
- return 1;
- }
- std::cout << "Discovering BLE devices";
- size_t num_devices = 0;
- bool no_new_devices = false;
- std::vector<std::unique_ptr<BluetoothDevice>> list_devices;
- while (ess_device == NULL && !no_new_devices) {
- list_devices = manager->get_devices();
- std::cout << "." << std::flush;
- if (list_devices.size() > 0 && list_devices.size() == num_devices)
- no_new_devices = true;
- num_devices = list_devices.size();
-
- // Look for active ESS device
- for (auto it = list_devices.begin(); it != list_devices.end(); ++it) {
- if ((*it)->get_rssi() != 0) {
- auto list_uuids = (*it)->get_uuids();
- for (auto uuit = list_uuids.begin(); uuit != list_uuids.end(); ++uuit) {
- if (*(uuit) == BT_UUID_ESS) {
- ess_device = (*it).release();
- break;
- }
- }
- }
- }
-
- if (ess_device == NULL)
- std::this_thread::sleep_for(std::chrono::seconds(4));
- }
- ret = manager->stop_discovery();
- std::cout << std::endl;
-
- // Now try to connect
- if (ess_device != NULL) {
- std::cout << "Connecting to " << ess_device->get_name() << " with addr " << ess_device->get_address() << std::flush;
- try {
- if (ess_device->connect()) {
- std::cout << ". Connected" << std::endl;
- }
- else
- std::cout << ". Failed" << std::endl;
- } catch (BluetoothException& e) {
- std::cout << std::endl << e.what() << std::endl;
- return 1;
- }
- } else {
- std::cout << "ESS device not found." << std::endl;
- delete ess_device;
- return 1;
- }
-
- if (!ess_device->get_connected()) {
- delete ess_device;
- return 1;
- }
-
- std::cout << "Getting environmental service" << std::endl;
- std::unique_ptr<BluetoothGattService> environmental_service = ess_device->find(const_cast<std::string*>(&BT_UUID_ESS));
- std::cout << "Getting temperature characteristic" << std::endl;
- std::unique_ptr<BluetoothGattCharacteristic> temp_characteristic = environmental_service->find(const_cast<std::string*>(&BT_UUID_TEMPERATURE));
-
- std::vector<std::string> list_flags = temp_characteristic->get_flags();
- if (std::find(list_flags.begin(), list_flags.end(), BT_NOFITY_FLAG) != list_flags.end()) {
- std::unique_ptr<BluetoothGattDescriptor> meas = temp_characteristic->find(const_cast<std::string*>(&BT_UUID_MEASUREMENT));
- std::unique_ptr<BluetoothGattDescriptor> cud = temp_characteristic->find(const_cast<std::string*>(&BT_UUID_CUD));
- std::vector<unsigned char> name_bytes = cud->read_value();
- std::string name(reinterpret_cast<char *>(name_bytes.data()), name_bytes.size());
- std::cout << "Sensor name is '" << name << "'" << std::endl;
- std::vector<unsigned char> meas_bytes = meas->read_value();
- int notification_interval = meas_bytes[BT_MEAS_INTERVAL_INDEX];
- std::cout << "Temperature notification interval = " << notification_interval << " secs" << std::endl;
- std::cout << "Starting temperature notifications. " << std::endl;
- temp_characteristic->enable_value_notifications(data_callback, nullptr);
- wait_ctrl_c();
- temp_characteristic->disable_value_notifications();
- } else {
- std::cout << "Sensor does not support notifications" << std::endl;
- }
-
- /* Disconnect from the device */
- std::cout << "Disconnecting" << std::endl;
- try {
- ess_device->disconnect();
- delete ess_device;
- } catch (std::exception &e) {
- std::cout << "Error: " << e.what() << std::endl;
- }
- return 0;
-}
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