update the library and remove the port

Air_Quality_Sensor.cpp

@@ -0,0 +1,97 @@
+/*
+ * Air_Quality_Sensor.cpp
+ * Source file for Grove - Air Quality Sensor.
+ *
+ * Copyright (c) 2019 seeed technology inc.
+ * Author		: Lets Blu
+ * Created Time	: Jan 2019
+ * Modified Time:
+ *
+ * The MIT License (MIT)
+ *
+ * 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 "Air_Quality_Sensor.h"
+
+const int AirQualitySensor::FORCE_SIGNAL   = 0;
+const int AirQualitySensor::HIGH_POLLUTION = 1;
+const int AirQualitySensor::LOW_POLLUTION  = 2;
+const int AirQualitySensor::FRESH_AIR      = 3;
+
+AirQualitySensor::AirQualitySensor(int pin) 
+: _pin(pin), _voltageSum(0), _volSumCount(0) {
+    // do nothing
+}
+
+bool AirQualitySensor::init(void) {
+    int initVoltage = analogRead(_pin);
+
+    if (10 < initVoltage && initVoltage < 798) {
+        _currentVoltage = initVoltage;
+        _lastVoltage = _currentVoltage;
+
+        _standardVoltage = initVoltage;
+        _lastStdVolUpdated = millis();
+
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+int AirQualitySensor::slope(void) {
+    _lastVoltage = _currentVoltage;
+    _currentVoltage = analogRead(_pin);
+
+    _voltageSum += _currentVoltage;
+    _volSumCount += 1;
+
+    updateStandardVoltage();
+    if (_currentVoltage - _lastVoltage > 400 || _currentVoltage > 700) {
+        return AirQualitySensor::FORCE_SIGNAL;
+    }
+    else if ((_currentVoltage - _lastVoltage > 400 && _currentVoltage < 700)
+             || _currentVoltage - _standardVoltage > 150) {
+        return AirQualitySensor::HIGH_POLLUTION;
+    }
+    else if ((_currentVoltage - _lastVoltage > 200 && _currentVoltage < 700)
+             || _currentVoltage - _standardVoltage > 50) {
+        return AirQualitySensor::LOW_POLLUTION;
+    }
+    else {
+        return AirQualitySensor::FRESH_AIR;
+    }
+
+    return -1;
+}
+
+int AirQualitySensor::getValue(void) {
+    return _currentVoltage;
+}
+
+void AirQualitySensor::updateStandardVoltage(void) {
+    if (millis() - _lastStdVolUpdated > 500000) {
+        _standardVoltage = _voltageSum / _volSumCount;
+        _lastStdVolUpdated = millis();
+
+        _voltageSum = 0;
+        _volSumCount = 0;
+    }
+}

Air_Quality_Sensor.h

@@ -0,0 +1,62 @@
+/*
+ * Air_Quality_Sensor.h
+ * Header file for Grove - Air Quality Sensor.
+ *
+ * Copyright (c) 2019 seeed technology inc.
+ * Author		: Lets Blu
+ * Created Time	: Jan 2019
+ * Modified Time:
+ *
+ * The MIT License (MIT)
+ *
+ * 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.
+ */
+#ifndef __AIR_QUALITY_SENSOR_H__
+#define __AIR_QUALITY_SENSOR_H__
+
+#include "Arduino.h"
+
+class AirQualitySensor {
+public:
+    AirQualitySensor(int pin);
+
+    bool init(void);
+    int  slope(void);
+    int  getValue(void);
+
+    static const int FORCE_SIGNAL;
+    static const int HIGH_POLLUTION;
+    static const int LOW_POLLUTION;
+    static const int FRESH_AIR;
+
+protected:
+    int  _pin;
+
+    int  _lastVoltage;
+    int  _currentVoltage;
+    int  _standardVoltage;
+    
+    long _voltageSum;
+    int  _volSumCount;
+    long _lastStdVolUpdated;
+
+    void updateStandardVoltage(void);
+};
+
+#endif // __AIR_QUALITY_SENSOR_H__

examples/Grove_Air_Quality_Sensor/Grove_Air_Quality_Sensor.ino

@@ -0,0 +1,69 @@
+/*
+ * Grove_Air_Quality_Sensor.ino
+ * Demo for Grove - Air Quality Sensor.
+ *
+ * Copyright (c) 2019 seeed technology inc.
+ * Author    : Lets Blu
+ * Created Time : Jan 2019
+ * Modified Time:
+ *
+ * The MIT License (MIT)
+ *
+ * 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 "Air_Quality_Sensor.h"
+
+AirQualitySensor sensor(A0);
+
+void setup(void) {
+  Serial.begin(9600);
+  while (!Serial);
+
+  Serial.println("Waiting sensor to init...");
+  delay(20000);
+  
+  if (sensor.init()) {
+    Serial.println("Sensor ready.");
+  }
+  else {
+    Serial.println("Sensor ERROR!");
+  }
+}
+
+void loop(void) {
+  int quality = sensor.slope();
+
+  Serial.print("Sensor value: ");
+  Serial.println(sensor.getValue());
+  
+  if (quality == AirQualitySensor::FORCE_SIGNAL) {
+    Serial.println("High pollution! Force signal active.");
+  }
+  else if (quality == AirQualitySensor::HIGH_POLLUTION) {
+    Serial.println("High pollution!");
+  }
+  else if (quality == AirQualitySensor::LOW_POLLUTION) {
+    Serial.println("Low pollution!");
+  }
+  else if (quality == AirQualitySensor::FRESH_AIR) {
+    Serial.println("Fresh air.");
+  }
+  
+  delay(1000);
+}