---
title: "Pixl.js Bluetooth to Ethernet MQTT Bridge"
url: "https://maker.wiznet.io/mason/projects/Pixljs-Bluetooth-to-Ethernet-MQTT-Bridge-m/"
markdown_url: "https://maker.wiznet.io/mason/projects/Pixljs-Bluetooth-to-Ethernet-MQTT-Bridge-m/md"
type: "UCC: User Created Content"
author: "mason"
author_url: "https://maker.wiznet.io/mason/"
original_author: "mason"
original_url: "http://www.espruino.com/Pixl.js+BLE+Ethernet+Bridge"
published: "2022-03-31"
language: "en"
likes: 0
views: 296
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Pixl.js Bluetooth to Ethernet MQTT Bridge

> Pixl.js Bluetooth to Ethernet MQTT Bridge

Original author: mason (source: http://www.espruino.com/Pixl.js+BLE+Ethernet+Bridge)

## Article

This is just a very simple example of using Puck.js to send received Bluetooth LE advertising packets over MQTT to an server. Just wire up an Arduino WIZnet adaptor?[as shown on this page](http://www.espruino.com/arduino-w5100)?then upload the following code with the?`MQTTSERVER`?variable set to the IP address of a server running a (non-HTTPS) MQTT server. To view the received packets, you can run a command such as this if you have the Mosquitto tools installed on your PC:

```
mosquitto_sub -h 192.168.1.70 -v -t "/advertise"
```

**NOTE:**?This is a simple example and isn't designed to deal with a large volume of advertising packets. To make this more robust you might want to consider adding a whitelist of BLE addresses that will be forwarded.

## Source Code[?](http://www.espruino.com/Pixl.js+BLE+Ethernet+Bridge#source-code)

```
var MQTTSERVER = "192.168.1.70";
var eth, mqtt;
var packets = 0;
var infoInterval;

function onInit() {
  Terminal.println("nn"); // add some clear lines
  Terminal.println("Ethernet setup");
  SPI1.setup({ mosi:D11, miso:D12, sck:D13 });
  eth = require("WIZnet").connect(SPI1, D10 /*CS*/);
  eth.setIP({mac:"00:08:dc:ab:cd:ef"});
  eth.setIP(); // DHCP
  Terminal.println("Ethernet ok, "+eth.getIP().ip);
  Terminal.print("MQTT...");
  mqtt = require("MQTT").connect({
    host: MQTTSERVER,
  });
  mqtt.on('connected', function() {
    Terminal.println("Connected!");
    startScan();
  });
  mqtt.on('disconnected', function() {
    Terminal.println("MQTT disconnected");
    stopScan();
  });
}

function startScan() {
  infoInterval = setInterval(function() {
    Terminal.println((packets/10)+" adverts/sec");
    packets = 0;
  }, 10000);
  NRF.setScan(function(dev) {
    delete dev.data; // we don't want to send the RAW data
    mqtt.publish("/advertise", JSON.stringify(dev));
    packets++;
  });
}

function stopScan() {
  clearInterval(infoInterval);
  NRF.setScan(); // stop scanning
}

onInit();
```

---

Source: https://maker.wiznet.io/mason/projects/Pixljs-Bluetooth-to-Ethernet-MQTT-Bridge-m/