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start work on lora ingest app
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Matt
2025-04-15 20:16:04 -04:00
parent 7b3e6e4fd1
commit 33726de0cb
6 changed files with 584 additions and 0 deletions
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1
lora/.npmrc Normal file
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@jsr:registry=https://npm.jsr.io

60
lora/LoraStream.js Normal file
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import { Transform } from 'stream';
export class LoraStream extends Transform {
constructor(options) {
super(options);
this.byteBuffer = new Uint8Array([]);
this.textDecoder = new TextDecoder();
}
_transform(chunk, encoding, callback) {
this.byteBuffer = new Uint8Array([
...this.byteBuffer,
...chunk,
]);
let processingExhausted = false;
while (this.byteBuffer.length !== 0 && !processingExhausted) {
const framingIndex = this.byteBuffer.findIndex((byte) => byte === 0x94);
const framingByte2 = this.byteBuffer[framingIndex + 1];
if (framingByte2 === 0xc3) {
if (this.byteBuffer.subarray(0, framingIndex).length) {
this.byteBuffer = this.byteBuffer.subarray(framingIndex);
}
const msb = this.byteBuffer[2];
const lsb = this.byteBuffer[3];
if (msb !== undefined && lsb !== undefined && this.byteBuffer.length >= 4 + (msb << 8) + lsb) {
const packet = this.byteBuffer.subarray(4, 4 + (msb << 8) + lsb);
const malformedDetectorIndex = packet.findIndex(
(byte) => byte === 0x94,
);
if (malformedDetectorIndex !== -1 && packet[malformedDetectorIndex + 1] === 0xc3) {
// malformed
this.byteBuffer = this.byteBuffer.subarray(malformedDetectorIndex);
} else {
this.byteBuffer = this.byteBuffer.subarray(3 + (msb << 8) + lsb + 1);
this.push(packet);
}
} else {
/** Only partioal message in buffer, wait for the rest */
processingExhausted = true;
}
} else {
/** Message not complete, only 1 byte in buffer */
processingExhausted = true;
}
}
callback();
}
_flush(callback) {
try {
if (this._buffer) {
this.push(this._buffer.trim());
}
callback();
} catch (err) {
callback(err);
}
}
}

61
lora/MeshtasticStream.js Normal file
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import { Transform } from 'stream';
import { Mesh, Channel, Config, ModuleConfig } from '@meshtastic/protobufs';
import { fromBinary, create } from '@bufbuild/protobuf';
export class MeshtasticStream extends Transform {
constructor(options) {
super({ readableObjectMode: true, ...options });
}
_transform(chunk, encoding, callback) {
const dataPacket = fromBinary(Mesh.FromRadioSchema, chunk);
let schema = null;
switch(dataPacket.payloadVariant.case) {
case 'packet':
schema = Mesh.MeshPacketSchema;
break;
case 'nodeInfo':
schema = Mesh.NodeInfoSchema;
break;
case 'myInfo':
schema = Mesh.MyNodeInfoSchema;
break;
case 'deviceuiConfig':
// can't find, come back to this
break;
case 'config':
// todo: config has another payloadVariant within it
schema = Config.ConfigSchema
break;
case 'moduleConfig':
// todo: config has another payloadVariant within it
schema = ModuleConfig.ModuleConfigSchema
break;
case 'fileInfo':
schema = Mesh.FileInfoSchema
break;
case 'channel':
schema = Channel.ChannelSchema
break;
case 'metadata':
schema = Mesh.DeviceMetadataSchema
break;
case 'configCompleteId':
// done sending init data
break;
}
if (schema !== null) {
this.push(create(schema, dataPacket.payloadVariant.value));
}
callback();
}
_flush(callback) {
try {
if (this._buffer) {
this.push(this._buffer.trim());
}
callback();
} catch (err) {
callback(err);
}
}
}

103
lora/index.js Normal file
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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);
}
}

341
lora/package-lock.json generated Normal file
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lora/package.json Normal file
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@ -0,0 +1,18 @@
{
"name": "lora",
"version": "1.0.0",
"main": "index.js",
"author": "",
"license": "ISC",
"description": "",
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