chore: change default websockify port from 4534 to 4540

Avoids collision with SatDump and other satellite software that
defaults to the hamlib rotctld port range (4532–4534).

Author: sandrwich

CONTRIBUTING.md

@@ -46,10 +46,10 @@ The project includes a WebSocket rotator simulator that speaks rotctld protocol
 ```bash
 npm run rotator-sim
 # or with a custom port:
-node scripts/rotator-sim.mjs 4534
+node scripts/rotator-sim.mjs 4540
 ```
 
-Connect in the app: Setup tab → Network mode → `ws://localhost:4534` (or `4533` for default).
+Connect in the app: Setup tab → Network mode → `ws://localhost:4540` (or `4533` for default).
 
 ### rotctld dummy rotator
 
@@ -60,9 +60,9 @@ Use Hamlib's `rotctld` with the dummy backend for a more realistic test (support
 rotctld -m 1 -vvvvv -t 1234 -C min_el=5
 
 # Terminal 2: bridge WebSocket to TCP (pick one)
-websocat --binary ws-l:127.0.0.1:4534 tcp:127.0.0.1:1234
+websocat --binary ws-l:127.0.0.1:4540 tcp:127.0.0.1:1234
 # or
-websockify 4534 localhost:1234
+websockify 4540 localhost:1234
 ```
 
 Install a bridge if needed:
@@ -72,7 +72,7 @@ cargo install websocat     # single Rust binary
 pip install websockify     # Python
 ```
 
-Connect in the app: Setup tab → Network mode → `ws://localhost:4534`.
+Connect in the app: Setup tab → Network mode → `ws://localhost:4540`.
 
 Verify rotctld is responding:
 ```bash
@@ -86,7 +86,7 @@ SSH port-forward rotctld from a remote host, then bridge locally:
 
 ```bash
 ssh user@rotator-host -L 4533:localhost:4533 -N &
-websocat --binary ws-l:127.0.0.1:4534 tcp:127.0.0.1:4533
+websocat --binary ws-l:127.0.0.1:4540 tcp:127.0.0.1:4533
 ```
 
 ## Desktop Builds (Tauri)

src/rotator/rotctld.ts

@@ -27,7 +27,7 @@ export class RotctldDriver implements RotatorDriver {
   }
 
   async connect(options: RotatorConnectOptions): Promise<void> {
-    const url = options.wsUrl ?? 'ws://localhost:4534';
+    const url = options.wsUrl ?? 'ws://localhost:4540';
     return new Promise<void>((resolve, reject) => {
       const ws = new WebSocket(url, ['binary']);
       ws.binaryType = 'arraybuffer';

src/stores/rotator.svelte.ts

@@ -42,7 +42,7 @@ class RotatorStore {
   mode = $state<RotatorMode>('serial');
   serialProtocol = $state<SerialProtocol>('gs232');
   baudRate = $state(9600);
-  wsUrl = $state('ws://localhost:4534');
+  wsUrl = $state('ws://localhost:4540');
   updateIntervalMs = $state(2000);
   tolerance = $state(3.0);
   parkPreset = $state<ParkPreset>('north');

src/ui/RotatorWindow.svelte

@@ -1056,10 +1056,10 @@
                 <code>cargo install websocat</code>
               </li>
               <li>Run the bridge:<br>
-                <code>websockify 4534 localhost:4533</code><br>
-                <code>websocat --binary ws-l:0.0.0.0:4534 tcp:127.0.0.1:4533</code>
+                <code>websockify 4540 localhost:4533</code><br>
+                <code>websocat --binary ws-l:0.0.0.0:4540 tcp:127.0.0.1:4533</code>
               </li>
-              <li>Enter <code>ws://localhost:4534</code> as the URL above</li>
+              <li>Enter <code>ws://localhost:4540</code> as the URL above</li>
               <li>Switch to the Radar tab and click Connect</li>
             </ol>
           {/if}