Add saltybot_motor_daemon ROS2 package — Python daemon that subscribes to /cmd_vel and drives the FC via W<speed>,<steer>\n over /dev/ttyTHS1 at 921600 baud. - motor_daemon_node.py: 50 Hz fixed-rate TX, 200ms safety watchdog, Twist→ESC conversion (±1000 range), FC ack parsing (W:<s>,<st>), periodic ? status query, /diagnostics publisher, auto-reconnect - config/motor_daemon_params.yaml: all tunable params with comments - launch/motor_daemon.launch.py: parameterised launch file - test/test_motor_daemon.py: 25 unit tests (all passing) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Description
SaltyLab self-balancing bot firmware (STM32F722)
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