Sail-by-wire

aim

retrofit engine (propulsion), gearbox (gear) and steering (rudder) with controller based on Sean's work

• https://pypilot.org/schematics/
• https://github.com/pypilot/pypilot/tree/master/arduino/motor

hardware

• ESP32 fully featured Microcontroller (< EUR 10,-)
• IBT-2 BTS7960 based Double-H-Bridge (< EUR 10,-)
• sensors:
  • angular:
    • 10k Ohm linear pot (as suggested by Sean)
    • off-the-shelf rudder angle sensor 0-190 Ohm
    • rotary encoder
  • position switches:
    • end stop
    • forward/ neutral / reverse
  • current sense:
    • BTS7960 feature
  • over temprature:
    • BTS7960 feature
  • voltage sense
• power-drive:
  • windshield wiper motor
  • hydraulic pump
  • linear drive
  • ...

commercial products

• ZF Pod Drives
  • DeviceNet ?
• Volvo† IPS und Volvo Aquamatic
  • J1939 ?
• Teleflex Optimus 360 Systems
  • DeviceNet ?
• Yanmar VC10 und JC10 (Joystick) Control Systeme)
  • DebiceNet ?

toDo

• explore communication protocols

communication

conceptual layer

remote control via

• autopilot
  • pyPilot
  • Raymarine EV-2 https://www.raymarine.de/view/index-id=7686.html
  • Garmin Steer-by-wire
• remote controller
  • Android, iOS, Windows, Linux, ...
  • buttons, joysticks, levers, ...

physical layer

• on device via web-server
• wifi
• ethernet
• can-bus
  • nmea2000
  • ...
• serial
  • Sean's pyPilot
• bluetooth
• infrared
• radio 10kHz

protocol layer

[...] = porposed feature

signalK

• rudder
  • control
    • /vessels/<RegExp>/steering/rudderAngleTarget
  • feedback
    • /vessels/<RegExp>/steering/rudderAngle
    • /vessels/<RegExp>/steering/[controllerState]
      • [overTemp]
      • [overCurrent]
      • [underVoltage]
      • ....
• gear
  • control
    • /vessels/<RegExp>/propulsion/<RegExp>/transmission/gear[Target]
  • feedback
    • /vessels/<RegExp>/propulsion/<RegExp>/transmission/gear
• engine
  • control
    • /vessels/<RegExp>/propulsion/<RegExp>/revolutions[Target]
    • /vessels/<RegExp>/propulsion/<RegExp>/engineLoad[Target]
  • feedback
    • /vessels/<RegExp>/propulsion/<RegExp>/revolutions
    • /vessels/<RegExp>/propulsion/<RegExp>/engineLoad

nmea2000

• rudder
  • control
    • pgn 127237 Heading/Track Control
  • feedback
    • pgn 127245 Rudder
• gear
  • control
    • NONE
  • feedback
    • pgn 127493 Transmission Parameters, Dynamic
• propulsion
  • control
    • NONE
  • feedback
    • pgn 127488 Engine Parameters, Rapid Update
    • pgn 127489 Engine Parameters, Dynamic

Sean's serial

(just a quick shot, details pending ...)

• rudder
  • control
    • ...
  • feedback
    • rudder_angle_sense
    • port_endstop_pin
    • starboard_endstop_pin
    • controller_temperature
    • motor_temperature
    • voltage_sense
    • shunt_sense_pin
    • low_current_pin
    • clutch_pin
    • led_pin
    • pwm_style_pin
    • ...