From https://mangavalk.com/Hexapod/Hexapod @ 7945005 (its Hexapod_Teensy
is identical to the copy already in LEGACY). Earlier electronics
generation: on-board IK driving an external SSC-32-style servo
controller. Notes on what still applies are in CLAUDE.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- LEGACY/Hexapod_Teensy/: old robot sketch (reference only).
- platformio.ini: robot env targets teensy36 (owner-confirmed board).
- Config.h: per-servo SERVOS table (pin, pulse at 0 deg, signed
us/deg, pulse limits) built from the old sketch's pins, ranges, trims
and the old Unity servo directions. Rear-left/front-left coxa offsets
set to 0: the owner re-horns those two servos (the old +-90 left them
at the end of travel; the sim showed them clamping).
- ServoDriver: 18 servos on hardware PWM (50 Hz, 16-bit); the Teensy 3.6
Servo library stops at 12.
- Radio on CE 39 / CSN 15 with SPI SCK on pin 14.
- sim: analogWrite/PWM shims, pulses decoded through SERVOS (API v6).
- Docs: CLAUDE.md, READMEs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- LEGACY/remote/teensy/: old remote sketch from
https://mangavalk.com/Hexapod/remote.git @ 492dece (reference only).
- remote/Config.h: sticks on A0-A5, Nextion on Serial1 (0/1), as in the
old sketch; MPU6050 moved to Wire2 (25/24) since A4/A5 are Wire's pins.
- NextionUI: controls on a vscope-global "control" page added to the
old HMI; keeps the old t1 status texts; the old page-1 b2 button (and
serial 'U') enter Nextion upload passthrough, following the PC's baud.
- Docs: NEXTION.md, remote README wiring, CLAUDE.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Simulation
- sim/: the unchanged robot firmware compiled into hexapod_sim.dll
against PC stand-ins (Arduino, Servo, Wire + register-level MPU6050,
RF24 with matching-config radio), a kinematic body model (support
plane + planted-foot odometry) that also drives the simulated IMU,
and a headless smoke test (sim_smoke). build.ps1 builds and tests.
- Hexapod_Simulation_Unity/ folded in (history kept in a bundle
outside the repo). Assets/HexapodSim loads the DLL, drives the
existing leg rig, and offers joystick / keyboard / robot-serial
input plus a test panel.
Robot (all found or confirmed in the simulation)
- Config.h geometry taken from the Unity model.
- IK femur elevation sign, gait stance direction, body pose
rotation direction, yaw lever arm.
- Stance feet integrated from the current command; gait restarts at
mid-stance; heading integrates the applied turn rate, only while
walking.
- Leg clearance and reach checks (Limits::feetFeasible); walk command
and body pose scaled as a whole, pose scale rate-limited, planted
feet guarded so the body never snaps or legs collide.
- Robot-gyro self-leveling as an integrator.
- Heading mode: steering relative to the body; S walks backward.
- Standing height from the remote (STANCE_HEIGHT_RANGE_MM).
Protocol v3 (reflash both boards)
- CmdPacket gains body_height (22 bytes).
Remote
- Height slider (Nextion hHeight/nHeight, serial [ ]).
- Fixed unspecified I2C read order in RemoteIMU.
LEGACY/: owner's old Nextion HMI and remote hardware assets.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Not yet verified on hardware.
- shared/HexapodProtocol: CmdPacket (now 20 bytes, adds remote_roll /
remote_pitch), FLAG_* bits and radio settings as the single protocol
definition; static payload size = sizeof(CmdPacket) on both radios.
- robot: use the shared protocol; vx = forward (harness w/x <-> q/e);
InputMapper adds remote tilt on top of the right stick when
FLAG_REMOTE_GYRO is set, and robot.ino no longer zeroes stick
roll/pitch when it's off.
- remote (Teensy 4.1): Sticks (calibration, EEPROM), RemoteIMU,
RemoteState (interlocks, link-loss disarm, smoothing), PacketBuilder,
RadioLink, NextionUI, SerialConsole.
- CLAUDE.md, README.md, remote/README.md, remote/NEXTION.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Robot-side firmware (Teensy 4.0) imported unchanged as extracted.
platformio.ini defines [env:robot] (teensy40) and [env:remote]
(teensy41); scripts/select_src_dir.py points each env at its own
sketch folder so robot/ and remote/ stay Arduino-style sketches.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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