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/*
* Author: Petre Eftime <petre.p.eftime@intel.com>
* Copyright (c) 2015 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.
*/
#include <tinyb.hpp>
#include <vector>
#include <iostream>
#include <thread>
#include <atomic>
#include <csignal>
using namespace tinyb;
/** Converts a raw temperature read from the sensor to a Celsius value.
* @param[in] raw_temp The temperature read from the sensor (two bytes)
* @return The Celsius value of the temperature
*/
static float celsius_temp(uint16_t raw_temp)
{
const float SCALE_LSB = 0.03125;
return ((float)(raw_temp >> 2)) * SCALE_LSB;
}
std::atomic<bool> running(true);
void signal_handler(int signum)
{
if (signum == SIGINT) {
running = false;
}
}
/** This program reads the temperature from a
* TI Sensor Tag(http://www.ti.com/ww/en/wireless_connectivity/sensortag2015/?INTC=SensorTag&HQS=sensortag)
* Pass the MAC address of the sensor as the first parameter of the program.
*/
int main(int argc, char **argv)
{
if (argc < 2) {
std::cerr << "Run as: " << argv[0] << " <device_address>" << std::endl;
exit(1);
}
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);
}
/* Start the discovery of devices */
bool ret = manager->start_discovery();
std::cout << "Started = " << (ret ? "true" : "false") << std::endl;
BluetoothDevice *sensor_tag = NULL;
BluetoothGattService *temperature_service = NULL;
for (int i = 0; i < 15; ++i) {
std::cout << "Discovered devices: " << std::endl;
/* Get the list of devices */
auto list = manager->get_devices();
for (auto it = list.begin(); it != list.end(); ++it) {
std::cout << "Class = " << (*it)->get_class_name() << " ";
std::cout << "Path = " << (*it)->get_object_path() << " ";
std::cout << "Name = " << (*it)->get_name() << " ";
std::cout << "Connected = " << (*it)->get_connected() << " ";
std::cout << std::endl;
/* Search for the device with the address given as a parameter to the program */
if ((*it)->get_address() == argv[1])
sensor_tag = (*it).release();
}
/* Free the list of devices and stop if the device was found */
if (sensor_tag != nullptr)
break;
/* If not, wait and try again */
std::this_thread::sleep_for(std::chrono::seconds(4));
std::cout << std::endl;
}
/* Stop the discovery (the device was found or number of tries ran out */
ret = manager->stop_discovery();
std::cout << "Stopped = " << (ret ? "true" : "false") << std::endl;
if (sensor_tag == nullptr) {
std::cout << "Could not find device " << argv[1] << std::endl;
return 1;
}
/* Connect to the device and get the list of services exposed by it */
sensor_tag->connect();
std::cout << "Discovered services: " << std::endl;
while (true) {
/* Wait for the device to come online */
std::this_thread::sleep_for(std::chrono::seconds(4));
auto list = sensor_tag->get_services();
if (list.empty())
continue;
for (auto it = list.begin(); it != list.end(); ++it) {
std::cout << "Class = " << (*it)->get_class_name() << " ";
std::cout << "Path = " << (*it)->get_object_path() << " ";
std::cout << "UUID = " << (*it)->get_uuid() << " ";
std::cout << "Device = " << (*it)->get_device().get_object_path() << " ";
std::cout << std::endl;
/* Search for the temperature service, by UUID */
if ((*it)->get_uuid() == "f000aa00-0451-4000-b000-000000000000")
temperature_service = (*it).release();
}
break;
}
if (temperature_service == nullptr) {
std::cout << "Could not find service f000aa00-0451-4000-b000-000000000000" << std::endl;
return 1;
}
BluetoothGattCharacteristic *temp_value = nullptr;
BluetoothGattCharacteristic *temp_config = nullptr;
BluetoothGattCharacteristic *temp_period = nullptr;
/* If there is a temperature service on the device with the given UUID,
* get it's characteristics, by UUID again */
auto list = temperature_service->get_characteristics();
std::cout << "Discovered characteristics: " << std::endl;
for (auto it = list.begin(); it != list.end(); ++it) {
std::cout << "Class = " << (*it)->get_class_name() << " ";
std::cout << "Path = " << (*it)->get_object_path() << " ";
std::cout << "UUID = " << (*it)->get_uuid() << " ";
std::cout << "Service = " << (*it)->get_service().get_object_path() << " ";
std::cout << std::endl;
if ((*it)->get_uuid() == "f000aa01-0451-4000-b000-000000000000")
temp_value = (*it).release();
else if ((*it)->get_uuid() =="f000aa02-0451-4000-b000-000000000000")
temp_config = (*it).release();
else if ((*it)->get_uuid() == "f000aa03-0451-4000-b000-000000000000")
temp_period = (*it).release();
}
if (temp_config == nullptr || temp_value == nullptr || temp_period == nullptr) {
std::cout << "Could not find characteristics." << std::endl;
return 1;
}
/* Activate the temperature measurements */
try {
std::vector<unsigned char> config_on {0x01};
temp_config->write_value(config_on);
while (running) {
/* Read temperature data and display it */
std::vector<unsigned char> response = temp_value->read_value();
unsigned char *data;
unsigned int size = response.size();
if (size > 0) {
data = response.data();
std::cout << "Raw data=[";
for (unsigned i = 0; i < response.size(); i++)
std::cout << std::hex << static_cast<int>(data[i]) << ", ";
std::cout << "] ";
uint16_t ambient_temp, object_temp;
object_temp = data[0] | (data[1] << 8);
ambient_temp = data[2] | (data[3] << 8);
std::cout << "Ambient temp: " << celsius_temp(ambient_temp) << "C ";
std::cout << "Object temp: " << celsius_temp(object_temp) << "C ";
std::cout << std::endl;
}
std::this_thread::sleep_for(std::chrono::seconds(1));
}
} catch (std::exception &e) {
std::cout << "Error: " << e.what() << std::endl;
}
/* Disconnect from the device */
try {
sensor_tag->disconnect();
} catch (std::exception &e) {
std::cout << "Error: " << e.what() << std::endl;
}
return 0;
}
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