| /* |
| * Author: Jon Trulson <jtrulson@ics.com> |
| * Copyright (c) 2014 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. |
| */ |
| #pragma once |
| |
| #include <string> |
| #include <mraa/aio.h> |
| |
| namespace upm { |
| |
| /** |
| * @brief MQ303A Alcohol Sensor library |
| * @defgroup mq303a libupm-mq303a |
| * @ingroup seeed analog gpio gaseous tsk |
| */ |
| /** |
| * @library mq303a |
| * @sensor mq303a |
| * @comname MQ303A Alcohol Sensor |
| * @altname Grove Alcohol Sensor |
| * @type gaseous |
| * @man seeed |
| * @web http://www.seeedstudio.com/wiki/Grove_-_Alcohol_Sensor |
| * @con analog gpio |
| * @kit tsk |
| * |
| * @brief API for the MQ303A Alcohol Sensor |
| * |
| * UPM module for the MQ303A alcohol sensor. |
| * This sensor needs to be warmed up before stable results are |
| * obtained. The higher the value returned from value(), |
| * the higher the amount of alcohol detected. |
| * |
| * @image html mq303a.jpg |
| * @snippet mq303a.cxx Interesting |
| */ |
| class MQ303A { |
| public: |
| /** |
| * MQ303A constructor |
| * |
| * @param pin Analog pin to use |
| * @param heaterPin Digital pin mapped to the analog pin to use |
| */ |
| MQ303A(int pin, int heaterPin); |
| |
| /** |
| * MQ303A destructor |
| */ |
| ~MQ303A(); |
| |
| /** |
| * Gets the alcohol reading from the sensor. |
| * The value read from the analog pin is inverted. |
| * A higher returned value means a higher amount of alcohol detected. |
| * |
| * @return Alcohol reading |
| */ |
| int value(); |
| |
| /** |
| * Enables the heater |
| * |
| * @param enable Enables the heater if true; otherwise, disables it |
| */ |
| void heaterEnable(bool enable); |
| |
| private: |
| mraa_aio_context m_aio; |
| mraa_gpio_context m_gpio; |
| }; |
| } |
| |
| |