1 /**
2  * Copyright 2017 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "dbusactiveread.hpp"
18 
19 #include "util.hpp"
20 
21 #include <chrono>
22 #include <cmath>
23 #include <iostream>
24 
25 ReadReturn DbusActiveRead::read(void)
26 {
27     struct SensorProperties settings;
28     double value;
29 
30     _helper->getProperties(_bus, _service, _path, &settings);
31 
32     value = settings.value * pow(10, settings.scale);
33 
34     /*
35      * Technically it might not be a value from now, but there's no timestamp
36      * on Sensor.Value yet.
37      */
38     struct ReadReturn r = {value, std::chrono::high_resolution_clock::now()};
39 
40     return r;
41 }
42