start work on lora ingest app

lora/index.js

@@ -0,0 +1,103 @@
+const { Mesh, Mqtt, Portnums, Telemetry, Config, Channel } = require("@meshtastic/protobufs");
+const { fromBinary, toBinary, create } = require("@bufbuild/protobuf");
+const { LoraStream } = require("./LoraStream");
+const { MeshtasticStream } = require("./MeshtasticStream");
+
+const net = require('net');
+
+const client = new net.Socket();
+const IP = '192.168.10.117';
+const PORT = 4403;
+
+function sendHello() {
+    const data = create(Mesh.ToRadioSchema, {
+        payloadVariant: {
+            case: "wantConfigId",
+            value: 1,
+        }
+    });
+    sendToDevice(toBinary(Mesh.ToRadioSchema, data));
+}
+
+function sendToDevice(data) {
+    const bufferLength = data.length;
+    const header = new Uint8Array([
+        0x94,
+        0xC3,
+        (bufferLength >> 8) & 0xFF,
+        bufferLength & 0xFF,
+    ]);
+    data = new Uint8Array([...header, ...data]);
+    client.write(data);
+}
+
+client.connect(PORT, IP, function() {
+	console.log('Connected');
+    sendHello();
+});
+
+const meshtasticStream = new MeshtasticStream();
+client.pipe(new LoraStream()).pipe(meshtasticStream);
+meshtasticStream.on('data', (data) => {
+    parseMeshtastic(data['$typeName'], data);
+})
+
+function parseMeshtastic(typeName, data) {
+    switch(typeName) {
+        case Mesh.MeshPacketSchema.typeName:
+            onMeshPacket(data);
+            break;
+        case Mesh.NodeInfoSchema.typeName:
+            console.log('node info');
+            break;
+    }
+}
+
+function onMeshPacket(envelope) {
+    const payloadVariant = envelope.payloadVariant.case;
+
+    if (payloadVariant === 'encrypted') {
+        //  attempt decryption
+    }
+
+    const dataPacket = envelope.payloadVariant.value;
+    const portNum = dataPacket.portnum;
+
+    if (!portNum) {
+        return;
+    }
+
+    let schema = null;
+    switch (portNum) {
+        case Portnums.PortNum.POSITION_APP:
+            schema = Mesh.PositionSchema;
+            break;
+        case Portnums.PortNum.TELEMETRY_APP:
+            schema = Telemetry.TelemetrySchema;
+            break;
+        case Portnums.PortNum.TEXT_MESSAGE_APP:
+            // no schema?
+            break;
+        case Portnums.PortNum.WAYPOINT_APP:
+            schema = Mesh.WaypointSchema;
+            break;
+        case Portnums.PortNum.TRACEROUTE_APP:
+            schema = Mesh.RouteDiscoverySchema;
+            break;
+        case Portnums.PortNum.NODEINFO_APP:
+            schema = Mesh.NodeInfoSchema;
+            break;
+        case Portnums.PortNum.NEIGHBORINFO_APP:
+            schema = Mesh.NeighborInfoSchema;
+            break;
+        case Portnums.PortNum.MAP_REPORT_APP:
+            schema = Mqtt.MapReportSchema;
+            break;
+    }
+
+    if (schema !== null) {
+        console.log(dataPacket);
+        const decodedData = fromBinary(schema, dataPacket.payload);
+        console.log(decodedData);
+    }
+}