I have a razer keyboard with separate LEDs for each key, and was curious whether I can address them using Python. As it turns out, there is linux driver and python library that makes it possible. I do not have specific usecase in mind, it could be useful for displaying notifications or progress bar — or perhaps something else entirely.
The setup is relatively straightforward. I just had to install the driver: https://openrazer.github.io/#download. They are kind enough to provide some examples: https://github.com/openrazer/openrazer/blob/master/examples/custom_zones.py
I changed the example a little to display the current outside temperature using LEDs placed on function row:
import time
from openrazer.client import DeviceManager
from pyowm.owm import OWM
# Create a DeviceManager. This is used to get specific devices
device_manager = DeviceManager()
print("Found {} Razer devices".format(len(device_manager.devices)))
devices = device_manager.devices
for device in devices:
if device.fx.advanced and device.name == "{{your keyboard}}":
keyboard = device
print("Selected device: " + device.name + " (" + device.serial + ")")
break
if not keyboard:
print("No suitable device found.")
# Disable daemon effect syncing.
# Without this, the daemon will try to set the lighting effect to every device.
device_manager.sync_effects = False
# Replace with your OpenWeatherMap API key
api_key = "{{redacted}}"
owm = OWM(api_key)
# Get weather for a specific location
city = "Wroclaw"
mgr = owm.weather_manager()
observation = mgr.weather_at_place(city)
while True:
weather = observation.weather
buttons_to_light = round(weather.temperature('celsius')['temp'])
for i in range(0, buttons_to_light):
keyboard.fx.advanced.matrix[0,1+i]=(0,0,255)
keyboard.fx.advanced.draw()
time.sleep(60)Another example, displaying server load, fetching it first from prometheus database:
import time
from openrazer.client import DeviceManager
import requests
# Create a DeviceManager. This is used to get specific devices
device_manager = DeviceManager()
print("Found {} Razer devices".format(len(device_manager.devices)))
devices = device_manager.devices
for device in devices:
if device.fx.advanced and device.name == "{{your keyboard}}":
keyboard = device
print("Selected device: " + device.name + " (" + device.serial + ")")
break
if not keyboard:
print("No suitable device found.")
device_manager.sync_effects = False
# Define the Prometheus server URL and query
prometheus_url = "http://192.168.1.43:9999/api/v1/query"
query = "node_load5{instance='fedora-1.home'}"
while True:
response = requests.get(prometheus_url, params={"query": query})
data = response.json()
result = data["data"]["result"]
timestamp, value = result[0]["value"]
load = round(float(value))
for i in range(0, load):
keyboard.fx.advanced.matrix[0,1+i]=(255,0,0)
keyboard.fx.advanced.draw()
time.sleep(60)
