mqtt-file-transfer

A simple Node.js module for transferring files over MQTT using streams.
Supports multiple concurrent transfers and verifies file integrity with SHA-256 checksums.

Features

- Stream files via MQTT in chunks
- Emit progress events
- Verify checksum and file size
- Support multiple concurrent transfers

Installation

``bash
npm install mqtt-file-transfer
`

Usage

$3

`ts
import { createReadStream } from "fs";
import mqtt from "mqtt";
import { MqttTransmitter } from "mqtt-file-transfer";

const client = mqtt.connect("mqtt://localhost:1883");
const stream = createReadStream("path/to/file.txt");

const transmitter = new MqttTransmitter({
client,
topic: "file-transfer",
stream,
});

transmitter.on("progress", (percent) => console.log("progress", percent));
transmitter.on("done", ({ fileName, checksum }) =>
console.log("done", fileName, checksum)
);

transmitter.start();
`

$3

`ts
import mqtt from "mqtt";
import { MqttReceiver } from "mqtt-file-transfer";

const client = mqtt.connect("mqtt://localhost:1883");

const receiver = new MqttReceiver({
client,
topic: "file-transfer",
outputDir: "./downloads",
});

receiver.on("start", (fileName) => console.log("started", fileName));
receiver.on("progress", (percent) => console.log("progress", percent));
receiver.on("done", ({ fileName, checksum }) =>
console.log("done", fileName, checksum)
);
receiver.on("error", (err) => console.error("error", err));

receiver.start();
``

$3

MIT