API for the Grove TP401 Air Quality Sensor. More...

Detailed Description

ID: tp401
Name: Grove Air Quality Sensor
Other Names: TP401 Gas Sensor
Category: gaseous
Manufacturer: seeed
Connection: analog
Kit: hak

The Grove TP401 Air Quality Sensor module is useful for monitoring air purity indoors. It can detect CO and a wide range of other harmful gases, but, due to a limited detection range, it should be used only when qualitative results are needed. Example applications are air recirculation, ventilation systems, and refreshing sprayers. The sensor is linear and should be roughly sensitive to 0-20 ppm CO from 0-4 V. Note: the sensor requires 2-3 minutes to warm up initially and 48 hours of operation to stabilize completely.

        // Instantiate new grove air quality sensor on analog pin A0
        upm_gas.TP401 airSensor = new upm_gas.TP401(0);
        System.out.println(airSensor.name());
        System.out.println("Heating sensor for 3 minutes...");
        // wait 3 minutes for sensor to warm up
        for (int i = 0; i < 3; i++) {
            if (i != 0)
                System.out.println("Please wait, " + i + " minute(s) passed..");
            Thread.sleep(60000);
        }
        System.out.println("Sensor ready!");
        while (true) {
            int value = airSensor.getSample(); // Read raw value
            float ppm = airSensor.getPPM(); // Read CO ppm (can vary slightly
                                            // from previous read)
            System.out.println("raw: " + value + " ppm: " + ppm + "  " + airQuality(value));
            Thread.sleep(100);
        }

Public Member Functions
synchronized void	delete ()

	TP401 (int gasPin)

String	name ()

float	getPPM ()

Public Member Functions inherited from Gas
synchronized void	delete ()

	Gas (int gasPin)

int	getSampledWindow (long freqMS, short[] numberOfSamples)

int	findThreshold (thresholdContext ctx, long threshold, short[] buffer)

int	getSampledData (thresholdContext ctx)

int	getSample ()

void	printGraph (thresholdContext ctx, short resolution)