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"""
Example of changing the colour of all Razer devices based on the CPU
temperature
"""
import colorsys
import time
import openrazer.client
# These settings are nice if your CPU temperature is a bit less than 30°C
# at idle and a bit more than 60°C at full load, tune them for your needs
tGreen = 30
tRed = 60
tRange = 3 * (tRed - tGreen)
colour0 = tRed / tRange
tRange = 1000 * tRange
devman = openrazer.client.DeviceManager()
devman.sync_effects = False
devices = devman.devices
if not devices:
print("No devices connected")
exit(1)
lastTemp = 0
while True:
# For my computer it's hwmon2/temp1_input but it may be different for you
# cat /sys/class/hwmon/hwmonX/tempY_input can help you (with X between 0
# and 2 and Y between 0 and 12, the result is in millidegrees).
# you will need lm-sensors for this to work.
with open("/sys/class/hwmon/hwmon2/temp1_input", "r") as f:
temp = f.readline()
shortTemp = temp[:2]
# Now we can change the colour each time temperature changes
if shortTemp != lastTemp:
# We convert the temperature (millidegrees) to the hue
# (HSV, hue between 0 and 1)
hue = (colour0 - float(temp) / tRange) % 1
# The colours list RGB with R,G,B between 0 and 1
colour = colorsys.hsv_to_rgb(hue, 1, 1)
# Needs to be an integer (0-255, e.g. 1 == 255)
colour = list(map(lambda x: (int(255 * x)), colour))
# Set effect on device
for device in devices:
# A device may have multiple zones
if device.has("lighting_static"):
device.fx.static(colour[0], colour[1], colour[2])
if device.has("lighting_backlight"):
device.fx.misc.backlight.static(colour[0], colour[1], colour[2])
if device.has("lighting_logo_static"):
device.fx.misc.logo.static(colour[0], colour[1], colour[2])
if device.has("lighting_scroll_static"):
device.fx.misc.scroll_wheel.static(colour[0], colour[1], colour[2])
if device.has("lighting_left_static"):
device.fx.misc.left.static(colour[0], colour[1], colour[2])
if device.has("lighting_right_static"):
device.fx.misc.right.static(colour[0], colour[1], colour[2])
lastTemp = shortTemp
time.sleep(1)
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