Rotatrix Wired Assembly Testing Procedure

Run through this after assembling the kit, before putting the case screws back on.

Plug in the USB-C cable. The left side light should blink white 3 times to indicate it's connected, then turn off. On Windows, the computer will play the USB connection sound. Open the Rotatrix app and check "Rotatrix Connected" is displayed a couple seconds after plugging in.
No side LED / not connected? Check the USB-C cable is fully seated at both ends, and try a different cable or port. Reseat the USB-port connector on the board. If it still isn't detected, contact support.
Check ball movement matches the ball — rolling the ball should move the cursor, and twisting it may scroll. Roll 90° in X and Y and visually verify it's within 10° or so. Twist 90° and verify as well.
Ball not moving at all? Carefully check the FFC ribbon connections to the optical sensors — each latch flipped down and the ribbon fully seated.
Ball only moves horizontally or vertically?
1. In the Rotatrix app status page, click the small gray "Show sensor data".
2. dx1/dy1 = SIDE sensor, dx2/dy2 = TOP sensor.
3. Check the FFC ribbon for any sensor that stays at 0.
Check each of the four buttons lights up in the Rotatrix app when pressed (and, depending on the button, may send a mouse click).
Move the 3-position switch to each position and check the side LED blinks red for top, green for middle, and blue for bottom.
On the right side, press and hold the DPI button and check the DPI LED is blue while it's held down.

LED indicators

The left side light signals the board's status when it isn't being driven by the app:

Blink pattern	Meaning
3 quick blinks, then off	Connected — normal operation
Rapid, continuous blinking	No USB connection — check the cable and port
One quick blink per second	USB suspended (computer is asleep)
Two quick blinks then a pause, once per second	Hardware error — contact support