After setting up the hardware devices and saying hello, a few commonly used constants and variables are defined. These include the alarm threshold, display minimum/maximum, and camera orientation settings that were previously loaded from the thermalcamera_config.py file. Default values in Celsius are converted to Fahrenheit where needed.
# Convert default alarm and min/max range values from config file ALARM_C = fahrenheit_to_celsius(ALARM_F) MIN_RANGE_C = fahrenheit_to_celsius(MIN_RANGE_F) MAX_RANGE_C = fahrenheit_to_celsius(MAX_RANGE_F)
Color values are defined next. The color definitions are used for the various text labels and measured values in the display's sidebar. The param_colors list is used by the setup helper that we'll discuss in the next section.
# Default colors for temperature value sidebar
BLACK = 0x000000
RED = 0xFF0000
YELLOW = 0xFFFF00
CYAN = 0x00FFFF
BLUE = 0x0000FF
WHITE = 0xFFFFFF
# Text colors for setup helper's on-screen parameters
SETUP_COLORS = [("ALARM", WHITE), ("RANGE", RED), ("RANGE", CYAN)]
