Add MHO9XX support to DHOvisor

[dmitriyk-aethernet]

For MHO954, at a minimum, the following must be changed:

• ws://HOST:9001 → ws://HOST/ws/display;
• ws://HOST:9002 → ws://HOST/ws/control;
• hard DHO resolution of 1024×600 and touch coordinate recalculation;
• possibly decoding the new video message format.
  Codex made a patch that made the app fully functional with my MHO954.
  patch_dhovisor_mho954.py

[mriscoc]

Hi, I copied the webcontrol.apk from the MHO series to a DHO800 device and it responded to the ws://HOST:9001 WebSocket requests. Are you sure the changes are necessary?

[dmitriyk-aethernet]

Yes, for this actual MHO954 the endpoint change is necessary, although it may depend on the model or firmware.
I repeated the test directly against the instrument:

• Model: RIGOL MHO954
• Firmware: 00.01.00
• TCP port 80: open
• TCP ports 9001 and 9002: closed
• ws://HOST:9001: connection refused
• ws://HOST:9002: connection refused
• ws://HOST/ws/display: WebSocket handshake succeeds
• ws://HOST/ws/control: WebSocket handshake succeeds
  The MHO954 itself serves /res/config.js, which explicitly defines:
  const screenSharingServerUrl = "ws://" + location.host + "/ws/display";
  const controlEventServerUrl = "ws://" + location.host + "/ws/control";
  After patching only those two endpoints in DHOVisor, it established both connections and successfully displayed the live MHO954 screen. The existing SET_ENCODER message and 1024×600 coordinate system still work unchanged.
  Therefore, copying the MHO APK to a DHO800 apparently makes it operate with the DHO environment/backend, but it does not show which ports are exposed by an actual MHO instrument.
  A backward-compatible solution could try :9001/:9002 first and fall back to /ws/display and /ws/control.

[dmitriyk-aethernet]

Its real image.

[mriscoc]

Can you test this version?

Download:

DHOVisor_setup_1.5.2.1.002.zip
DHOVisor_setup_1.5.2.1.001.zip

Rename the files to:

DHOVisor_setup_1.5.2.1.zip.001
DHOVisor_setup_1.5.2.1.zip.002

And extract with 7-zip

Now you can change the Websocket endpoints in the configuration file:

%USERPROFILE%\dhovisor\settings.json

{
  "host": "192.168.1.220",
  "video_ws": "ws://{host}:9001",
  "control_ws": "ws://{host}:9002",
  "window_size": [
    1024,
    600
  ],
  "window_position": [
    100,
    100
  ],
  "window_maximized": false
}

Change to:

"video_ws": "ws://{host}/ws/display",
"control_ws": "ws://{host}/ws/control",

[dmitriyk-aethernet]

Yes, it worked!