barnowl-enocean converts ambient EnOcean Wireless Standard packets collected from EnOcean Serial Protocol (ESP) devices into standard developer-friendly JSON that is vendor/technology/application-agnostic.
barnowl-enocean is a lightweight Node.js package that can run on resource-constrained edge devices. It is typically run behind a barnowl instance which is included in the Pareto Anywhere open source middleware suite.
Learn "owl" about the raddec JSON data output:
Clone this repository, install package dependencies with npm install, and then from the root folder run at any time:
npm start
barnowl-enocean will attempt to connect to an EnOcean Serial Protocol device (ex: USB dongle) and output (flattened) raddec JSON to the console.
The following code will listen to simulated hardware and output packets to the console:
const BarnowlEnOcean = require('barnowl-enocean');
let barnowl = new BarnowlEnOcean();
barnowl.addListener(BarnowlEnOcean.TestListener, {});
barnowl.on("raddec", function(raddec) {
console.log(raddec);
});
barnowl.on("infrastructureMessage", function(message) {
console.log(message);
});As output you should see a stream of raddec objects similar to the following:
{
transmitterId: "04141559",
transmitterIdType: 7,
rssiSignature: [
{
receiverId: "38bdfde8b5e5415a830551bda6484c23",
receiverIdType: 6,
rssi: -58,
numberOfDecodings: 1
}
],
packets: [ '55000f07012bd295db00b163e0f85800041415598001ffffffff3b0047' ],
timestamp: 1645568542222
}Regardless of the underlying RF protocol and hardware, the raddec specifies what (transmitterId) is where (receiverId & rssi), as well as how (packets) and when (timestamp).
The receiverId is a 128-bit UUID, which, as of v1.0.0, is generated on a per-session basis. In future versions, this UUID may remain persistent across sessions for a specific USB dongle.
Each packets entry is an EnOcean Serial Protocol 3 (ESP3) packet (from Sync byte to CRC8D, inclusive).
The following listener interfaces are supported.
Listen on a local serial interface to an EnOcean Serial Protocol (ESP) device. Check the serialport package for prerequisites specific to the target platform if any problems are encountered.
barnowl.addListener(BarnowlEnOcean.SerialListener, { path: "auto" });On Ubuntu, it may be necessary to add the user to the dialout group in order to have the necessary permissions to access the device, which can be accomplished with the command sudo usermod -a -G dialout $USER and made to take effect by logging out and back in to the user account.
Provides a steady stream of simulated packets for testing purposes.
barnowl.addListener(BarnowlEnOcean.TestListener, {});While barnowl-enocean may suffice standalone for simple real-time applications, its functionality can be greatly extended with the following software packages:
- advlib to decode the individual packets from hexadecimal strings into JSON
- barnowl to combine parallel streams of RF decoding data in a technology-and-vendor-agnostic way
These packages and more are bundled together as the Pareto Anywhere open source middleware suite, which includes several barnowl-x listeners.
barnowl-enocean includes a script to forward data to a local Pareto Anywhere instance as UDP raddecs with target localhost:50001. Start this script with the command:
npm run forwarder
Install Pareto Anywhere and barnowl-enocean by following a step-by-step tutorial on our reelyActive Developers site:
barnowl-enocean v1.0.0 was released in January 2024, superseding all earlier versions, the latest of which remains in the release-0.3 branch and as [email protected] on npm.
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Consult our security policy for best practices using this open source software and to report vulnerabilities.
MIT License
Copyright (c) 2022-2024 reelyActive
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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