A tiny system daemon to control and react to QNAP hardware, including:

• the panel LCD screen (toggle backlight and change displayed text)
• the panel LCD buttons, usually for navigating the LCD display
• the STATUS and USB LEDs
• the USB COPY button
• the disk ERROR LEDs

Also includes a demo program that makes use of the API exposed by the daemon.

Beware: this was developped and tested exclusively on the QNAP device I own, model TS-453 Pro. This code most likely won't work on different hardware.

TS-453 Pro features:

• an A125 LCD panel with a 2×16 char display, backlight and two control buttons
• a 4-disk bay, with activity and error LEDs for each of the 4 bays
• some extra LEDs: dual-color status (green & red), USB activity and network activity (this one sadly cannot be controlled)

qnapd is a C++ (Qt) daemon that:

• reads from internal serial device /dev/ttyS1 to intercept LCD button presses (ENTER and SELECT)
• writes to internal serial device /dev/ttyS1 to toggle LCD backlight and change LCD text
• polls a raw I/O port to intercept USB COPY button presses
• writes to a few raw I/O ports to toggle the various front panel LEDs

The daemon receives orders and broadcasts events using the system DBus. The DBus API is self-documented in the XML interface.

qnapctl is a C++ (Qt) program that communicates with qnapd to provide a few basic features:

• blinks the green status LED faster or slower depending on load average
• blinks the red status LED when there are failed systemd services
• displays a few basic info on the LCD display eg. NIC IP addresses, using LCD buttons to navigate the various info

MIT, see LICENSE.