Rudder

Reverse Engineering the Tiller Time Tracker

What is Tiller?

tiller.mp4

Why?

Because the hardware is top-notch, and I want to reuse it! I mean just check out this:

Machined aluminium - A precision machined aluminium dial perfectly meets your finger, giving a delightful tactility to using Tiller.

Precision bearing - Tiller uses a perfectly smooth rotary bearing, engineered to provide a satisfying resistance navigating between tasks.

Reliable USB - Tiller uses a hardwired connection to your computer, meaning always-on reliability and no batteries to charge.

Perfectly weighted - Tiller's weight, combined with its rubber pad, means that it stays put on your desk, right where you need it.

Installation

apt install libhidapi-libusb0

lsusb
lsusb -vd 16d0:0de0 > lusb-descriptors.txt
sudo dmesg | grep 'Product: Tiller' | tail -n 1

• HID Device (yay!)
  • 2 Interrupt endpoints
    • 0x01 EIP 1 OUT
      • 1 x 8 B
    • 0x92 EIP 2 IN
      • 1 x 10 B
• ``

Troubleshooting

usb.core.USBError: [Errno 13] Access denied (insufficient permissions)

• Check user is in plugdev > groups $USER
• sudo vim /etc/udev/rules.d/10-local.rules

SUBSYSTEM=="usb", ATTR{idVendor}=="16d0", ATTR{idProduct}=="0de0", MODE="0666"

sudo udevadm control --reload
sudo udevadm trigger