mrd / grideye_8x8

AMG8833 testing repo for Arduino, Adafruit Feather, Pycom Lopy and RPi

AMG8833 code repo for Arduino, Adafruit Feather, Pycom Lopy4 and Raspberry Pi

grideye_8x8

The repo is subdivided into four directories, one for each device. Each of the four directories contain useful URLs and brief guide to get the AMG8833 sensor running along with example code.

Adafruit AMG8833 and DotStar 8x8:

To quickly and easily visualise the output of the sensor Adafruit DotStar 8x8 LED matrix was used. The main reason for using this LED matrix as opposed to and LCD screen was connectivity interfaces. AMG8833 uses an I2C interface (as do a lot of LCD displays for RPi/Arduino etc) and the LED matrix had an SPI interface that enabled cleaner and more effcient prototyping.

Lastly, using the LED matrix was a lot faster than just using a Serial.print() to check the latency on all of the tested devices.

Code structure

Sketches are available for only AMG8833, DotStar matrix and AMG8833 and DotStar combined, as shown below:

thermal_cam_init_testing matrix_8x8_init_testing combined_matrix_cam

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Color range and the Processing sketch

Processing/rgb_lerp has RGB color codes to be pasted in Arduino/RPi/Feather/Lopy code to create a color pallete for the LED matrix. The code is using linear interpolation between colors to create smooth transitions. The interpolation is done in HSB color space to have a broader range of colors and then is converted to RGB values and in the end we get the following output:

...matrix.Color( 12 , 92 , 89 ), matrix.Color( 12 , 92 , 83 ), matrix.Color( 12 , 93 , 78 )...

Then it can be pasted into the code as an array for the aforementioned devices.

Entire color scheme:

More about Processing

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gifs

Raspberry Pi:

Arduino Uno:

Adafruit Feather:

Lopy4:

tested sensor only, no LED matrix test.

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