Datasheet

ManualsBrandsAdafruit ManualsAdafruitMLX90640 24x32 IR Thermal Camera Breakout, 110°

def MakeHeatMapColor():

for c in range(number_of_colors):

value = c * (NUM_COLORS-1) / last_color

idx1 = int(value) # Our desired color will be after this index.

if idx1 == value : # This is the corner case

red = color[idx1][0]

green = color[idx1][1]

blue = color[idx1][2]

else:

idx2 = idx1+1 # ... and before this index (inclusive).

fractBetween = value - idx1 # Distance between the two indexes (0-1).

red = int(round((color[idx2][0] - color[idx1][0]) * fractBetween + color[idx1][0]))

green = int(round((color[idx2][1] - color[idx1][1]) * fractBetween + color[idx1][1]))

blue = int(round((color[idx2][2] - color[idx1][2]) * fractBetween + color[idx1][2]))

palette[c]= ( 0x010000 * red ) + ( 0x000100 * green ) + ( 0x000001 * blue )

MakeHeatMapColor()

# Bitmap for colour coded thermal value

image_bitmap = displayio.Bitmap( 32, 24, number_of_colors )

# Create a TileGrid using the Bitmap and Palette

image_tile= displayio.TileGrid(image_bitmap, pixel_shader=palette)

# Create a Group that scale 32*24 to 128*96

image_group = displayio.Group(scale=4)

image_group.append(image_tile)

scale_bitmap = displayio.Bitmap( number_of_colors, 1, number_of_colors )

# Create a Group Scale must be 128 divided by number_of_colors

scale_group = displayio.Group(scale=2)

scale_tile = displayio.TileGrid(scale_bitmap, pixel_shader=palette, x = 0, y = 60)

scale_group.append(scale_tile)

for i in range(number_of_colors):

scale_bitmap[i, 0] = i # Fill the scale with the palette gradian

# Create the super Group

group = displayio.Group()

min_label = Label(terminalio.FONT, max_glyphs=10, color=palette[0], x = 0, y = 110)

max_label = Label(terminalio.FONT, max_glyphs=10, color=palette[last_color], x = 80, y = 110)

# Add all the sub-group to the SuperGroup

group.append(image_group)

group.append(scale_group)

group.append(min_label)

group.append(max_label)

# Add the SuperGroup to the Display

board.DISPLAY.show(group)

min_t = 20 # Initial minimum temperature range, before auto scale

max_t = 37 # Initial maximum temperature range, before auto scale

i2c = busio.I2C(board.SCL, board.SDA, frequency=800000)

mlx = adafruit_mlx90640.MLX90640(i2c)

print("MLX addr detected on I2C")

print([hex(i) for i in mlx.serial_number])

#mlx.refresh_rate = adafruit_mlx90640.RefreshRate.REFRESH_2_HZ

mlx.refresh_rate = adafruit_mlx90640.RefreshRate.REFRESH_4_HZ