#script that changes brightness on 51NB thinkpad X230 X330 FHD 13.3" LCD modification
#detects changes in Windows system brightness and sends a command to the LCD driver
#change vendor_id and product_ID to fit your hardware device under Device Manager->Human Interface Devices if it doesn't work, also double check soldering
#also turns off monitor on minimum setting



import subprocess
import pywinusb.hid as hid
import wmi
import win32gui
import win32con
import time
from os import getpid, system
from threading import Timer

screenOff = "asd"
   
def sample_handler(data):
    print("Raw data: {0}".format(data))



#turn off LCD
def turnoffLCD():
	def force_exit():
		pid = getpid()
	
	t = Timer(1, force_exit)
	t.start()
	SC_MONITORPOWER = 0xF170
	win32gui.SendMessage(win32con.HWND_BROADCAST, win32con.WM_SYSCOMMAND, SC_MONITORPOWER, 2)
	t.cancel()

#sends HID command between 0-255 to USB LCD controller 
def updateBrightness(brightnesslevel):
    filter = hid.HidDeviceFilter(vendor_id = 0x10C4, product_id = 0x83CE)
    hid_device = filter.get_devices()
    device = hid_device[0]
    device.open()
    device.set_raw_data_handler(sample_handler)
    out_report = device.find_feature_reports()[0]
    cmd = (0,
    brightnesslevel,
    )
    buffer = [0x00] * 2
    i = 0
    for x in cmd:
        buffer[i] = x
        i += 1
    out_report.set_raw_data(buffer)
    out_report.send()
    device.close()

#detects changes in brightness 
def brightnessChangeDetect():
    global screenOff
    c = wmi.WMI(namespace='wmi')
    watcher = c.WmiMonitorBrightnessEvent.watch_for(
      notification_type="Modification",
      delay_secs=1
      )
    event_happened = watcher()
    brightnesslevel = int((event_happened.Brightness)*2.5)
    if brightnesslevel > 0:
        screenOff = 0
    if brightnesslevel == 0 and screenOff == 0:
        turnoffLCD()
        time.sleep(1)
        screenOff = 1
    updateBrightness(brightnesslevel)

#main program
while True:
    
    brightnessChangeDetect()