There is no documentation. The code I provided changes the brightness to 0x80. Writing 0x00 will turn the display off. I also use this in my homeautomation solution, but it's not 100% stable and the touchscreen often doesn't respond anymore after changing brightness (mostly it starts responding agai...

I can confirm that this works: string i2cDeviceSelector = I2cDevice.GetDeviceSelector(); IReadOnlyList<DeviceInformation> devices = await DeviceInformation.FindAllAsync(i2cDeviceSelector); var settings = new I2cConnectionSettings(0x45); var screen = await I2cDevice.FromIdAsync(devices[0].Id, setting...