implement pair command

Makefile

@@ -11,6 +11,9 @@ venv: requirements.txt
 run: node_modules
 	./node_modules/.bin/ts-node --esm http_server.ts
 
+pair: node_modules
+	./node_modules/.bin/ts-node --esm cmd/pair.ts
+
 hook: bundle.js venv
 	./venv/bin/python3 -u loader3.py
 

README.md

@@ -11,6 +11,11 @@ Per pictures of the [X5](https://github.com/DavidVentura/cam-reverse/blob/master
 To execute the HTTP server, run `make run`; you can access the JPEG stream at http://localhost:1234/ and a file `audio.pcm` will be created.
 
 The roundtrip delay when using MJPEG is [~350ms](pics/delay.jpg?raw=true).
+
+## Pairing a new camera
+
+Connect to the device's access point and run `SSID=<your ssid> PSK=<your password> make pair`.
+
 ## Protocol
 
 The protocol is weirdly complex, though very little communication is necessary to use the device

cmd/pair.ts

@@ -0,0 +1,31 @@
+import { RemoteInfo } from "dgram";
+
+import { discoverDevices } from "../discovery.js";
+import { DevSerial } from "../impl.js";
+import { Handlers, makeSession, Session, configureWifi } from "../session.js";
+
+const opts = {
+  debug: true,
+  ansi: true,
+  discovery_ip: "192.168.1.255",
+};
+
+let sessions: Record<string, Session> = {};
+
+let devEv = discoverDevices(opts);
+const onLogin = configureWifi(process.env.SSID, process.env.PSK);
+
+devEv.on("discover", (rinfo: RemoteInfo, dev: DevSerial) => {
+  if (dev.devId in sessions) {
+    console.log(`ignoring ${dev.devId} - ${rinfo.address}`);
+    return;
+  }
+  console.log(`discovered ${dev.devId} - ${rinfo.address}`);
+  const s = makeSession(Handlers, dev, rinfo, onLogin, opts);
+
+  s.eventEmitter.on("disconnect", () => {
+    console.log("deleting from sessions");
+    sessions[dev.devId] = undefined;
+  });
+  sessions[dev.devId] = s;
+});