mlx90640 - infrared temperature measurement(MLX90640)

Adapted Air780E Air780EP Air780EPS

Note

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Constant

constant	type	explanation
mlx90640.FPS1HZ	number	FPS1HZ
mlx90640.FPS2HZ	number	FPS2HZ
mlx90640.FPS4HZ	number	FPS4HZ
mlx90640.FPS8HZ	number	FPS8HZ
mlx90640.FPS16HZ	number	FPS16HZ
mlx90640.FPS32HZ	number	FPS32HZ
mlx90640.FPS64HZ	number	FPS64HZ

mlx90640.init(i2c_id,refresh_rate) (Note: To use this interface after 2023.5.15, the user needs to initialize the i2c interface by himself.)

Initialize MLX90640 sensor

Parameters

Incoming Value Type	Explanation
int	i2c bus id or soft i2c object where the sensor is located, which defaults 0
int	The measurement rate of the sensor, which defaults 4Hz

Return Value

return value type	explanation
bool	Returns true on success, otherwise it returns nil or false

Examples

i2c.setup(i2cid,i2c_speed)
if mlx90640.init(0,mlx90640.FPS4HZ) then
    log.info("mlx90640", "init ok")
    sys.wait(500) -- Wait a moment
    while 1 do
        mlx90640.feed() -- Take a frame of data
        mlx90640.draw2lcd(0, 0 ,1)-- You need to initialize the LCD in advance.
        sys.wait(250) -- The default is 4HZ
    end
else
    log.info("mlx90640", "init fail")
end

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mlx90640.feed()

Take a frame of data

Parameters

None

Return Value

None

Examples

None

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mlx90640.raw_data()

Obtain the underlying bare data, floating-point matrix.

Parameters

None

Return Value

return value type	explanation
table	Floating-point data, 768 pixels corresponding to the temperature value

Examples

None

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mlx90640.raw_point(index)

Get a single point of data

Parameters

Incoming Value Type	Explanation
int	Index value(0-767)

Return Value

return value type	explanation
number	Single point temperature value

Examples

None

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mlx90640.ta_temp()

Get Case Temperature

Parameters

None

Return Value

return value type	explanation
number	Case temperature

Examples

None

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mlx90640.max_temp()

Get the highest temperature

Parameters

None

Return Value

return value type	explanation
number	Maximum temperature
number	Highest temperature position

Examples

None

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mlx90640.min_temp()

Get the lowest temperature

Parameters

None

Return Value

return value type	explanation
number	Minimum temperature
number	Minimum temperature position

Examples

None

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mlx90640.average_temp()

Get average temperature

Parameters

None

Return Value

return value type	explanation
number	average temperature

Examples

None

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mlx90640.get_vdd()

Get vdd

Parameters

None

Return Value

return value type	explanation
number	vdd

Examples

None

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mlx90640.draw2lcd(x, y, fold)

Draw lcd

Parameters

Incoming Value Type	Explanation
int	X coordinate of upper left corner
int	y coordinate of upper left corner
int	The magnification, which must be an exponential multiple of 2 (1,2,4,8,16…) defaults 1

Return Value

return value type	explanation
bool	Returns true on success, otherwise false

Examples

None

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