3D Printable split flap display

This is a 3D printable, expandable split flap display based on the original design of David Königsmann. This version uses his drum and flap design but completly redesigns the electrical system. Notable changes:

• New, more rigid case design.
• Hot-swappable modules
• New Backplane
• New PCB, using mostly smd components and an atmega8 mcu.
• RS-485 at 19200-Baud, Half-Duplex
• Custom leightweight protocol
• Controller, running an WebSockets-Server.
• Homing-Failure and overcurrent detection
• Address and calibration data is stored in EEPROM

The firmware as well as the Server is completly rewritten wrfrom scratch in plain c and can easily be ported to other mcu's.

Ongoing Project! This repository is not final.

Websockets Server

Satus request of all devices

Request:

{"command":"status"}

Response:

{
  "devices_all":2,
  "devices":[
    {
      "id":0,
      "address":0,
      "status":{
        "voltage":11.6015625,
        "rotations":4,
        "power":true,
        "raw":0,
        "device":"ONLINE",
        "flags":{
          "errorTooBig":false,
          "noHome":false,
          "fuseBlown":false,
          "homeSense":false,
          "powerDown":false,
          "failSafe":false,
          "busy":false
        }
      }
    },
    {
      "id":1,
      "address":1,
      "status":{
        "voltage":0.0,
        "rotations":0,
        "power":true,
        "raw":0,
        "device":"OFFLINE",
        "flags":{
          "errorTooBig":false,
          "noHome":false,
          "fuseBlown":false,
          "homeSense":false,
          "powerDown":false,
          "failSafe":false,
          "busy":false
        }
      }
    }
  ],
  "devices_online":1
}