Live testing revealed the joystick polar coordinate mapping (alt-az config):
- 0° = azimuth rotation clockwise (viewed from above)
- 90° = altitude DOWN (toward ground)
- 180° = azimuth counter-clockwise
- 270° = altitude UP (toward sky)
Also discovered that continuous slew to a mechanical limit causes the
firmware to emergency-stop and drop the network connection entirely,
requiring a physical power cycle. No soft-limit protection exists for
joystick slew commands.
Updated TEST_RESULTS.md with the coordinate map and safety warning.
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