LED Notifier

LED Notifier

Setting the color of a simple USB LED Notifier. Implemented in C# and .NET 6.0

Device

The device itself was purchased years ago from a chinese site.

Field Value
Vendor ID 0x1294
Product ID 0x1320
Product Name EMAIL
Device Name Webmail Notifier
Vendor RISO KAGAKU CORP.

It enumerates as a USB HID device and supports a limited set of colors.

  • Off
  • Blue
  • Red
  • Green
  • Aqua
  • Purple
  • Yellow
  • White

Implementation

I opted to use C# for a basic Windows implementation.

Colors are not bit mapped and only values between 0x0 and 0x7 are supported. The first byte sent to the device does not appear to have any effect as is left as 0xFF. Drivers are not needed as this is a basic HID device.

TODO

  • Basic pattern support (built from colors and durations)
  • Decode the HID device description
  • Better error handling
  • Service/Daemon for background operation
  • PWM (Low resolution considering the 1ms USB update frequency)
Software Engineer

Electronic engineer with a strong focus on embedded software development.