Gas Class Reference

Public Member Functions
	Gas (int gasPin)
virtual	~Gas ()
virtual int	getSampledWindow (unsigned int freqMS, int numberOfSamples, uint16_t *buffer)
virtual int	findThreshold (thresholdContext *ctx, unsigned int threshold, uint16_t *buffer, int len)
virtual int	getSampledData (thresholdContext *ctx)
virtual int	getSample ()
virtual void	printGraph (thresholdContext *ctx, uint8_t resolution)

Protected Attributes
mraa::Aio	m_aio

Constructor & Destructor Documentation

Gas

(

int

gasPin

)

Instantiates a Gas object

Parameters

gasPin

Pin where gas is connected

~Gas ( )

virtual

Gas object destructor

Member Function Documentation

int getSampledWindow ( unsigned int  freqMS, int  numberOfSamples, uint16_t *  buffer  )

virtual

Gets samples from the gas sensor according to the provided window and number of samples

Parameters

freqMS	Time between each sample (in milliseconds)
numberOfSamples	Number of sample to sample for this window
buffer	Buffer with sampled data

Here is the call graph for this function:

int findThreshold ( thresholdContext *  ctx, unsigned int  threshold, uint16_t *  buffer, int  len  )

virtual

Given the sampled buffer, this method returns TRUE/FALSE if the threshold is reached

Parameters

ctx	Threshold context
threshold	Sample threshold
buffer	Buffer with samples
len	Buffer length

int getSampledData ( thresholdContext *  ctx )

virtual

Returns average data for the sampled window

Parameters

ctx	Threshold context

int getSample ( )

virtual

Returns one sample from the sensor

Here is the caller graph for this function:

void printGraph ( thresholdContext *  ctx, uint8_t  resolution  )

virtual

Prints a running average of the threshold context

Parameters

ctx	Threshold context

Inheritance diagram for Gas:

---

The documentation for this class was generated from the following files:

• src/gas/gas.hpp
• src/gas/gas.cxx