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eno2mqtt

Written and (C) 2015 Oliver Wagner owagner@tellerulam.com

Provided under the terms of the MIT license.

Overview

eno2mqtt is a gateway between a Enocean ESP3-capable gateway module (e.g. a TCM310, USB300 or Enocean PI) and MQTT. It receives Enocean ERP1 telegrams and publishes them as MQTT topics.

It's intended as a building block in heterogenous smart home environments where an MQTT message broker is used as the centralized message bus. See https://github.com/mqtt-smarthome for a rationale and architectural overview.

Dependencies

• Java 1.7 SE Runtime Environment: https://www.java.com/
• Eclipse Paho: https://www.eclipse.org/paho/clients/java/ (used for MQTT communication)
• Minimal-JSON: https://github.com/ralfstx/minimal-json (used for JSON creation and parsing)
• NRJavaSerial: https://github.com/NeuronRobotics/nrjavaserial (used for serial communication)

Automatically built jars can be downloaded from the release page on GitHub at https://github.com/owagner/eno2mqtt/releases

Connection

The connection to the ESP3 device can either be made locally through a serial port (the USB300 stick is just a TCM310 with a FTDI USB<->Serial converter) or remotely via network via some remote serial service. The latter is useful if you want to put the USB300 stick in the most efficient position RF-wise, but have the actual processing running elsewhere. Some very low grade hardware (e.g. a TP-LINK WR703N with OpenWRT) can then be used as a remserial server for the stick.

DeviceList file

In order to know what type an Encoean device is and how to interpret it's messages, eno2mqtt needs a device list file. It's a simple text file with three columns:

Enocean_ID	EEP		Symbolic_Name

The Enocean_ID is the ID of the given device in hex notation, without a 0x prefix.

The EEP is the Enocean Equipment Profile ID, in the form RORG-FUNC-TYPE. A list of all EEPs is available on the Enocean web site at https://www.enocean.com/en/knowledge-base/

The Symbolic_Name is used as the topic prefix when publishing status reports from the given device. Depending on the EEP, this may be suffixed further.

Topics

A special topic is prefix/connected. It holds an enum value which denotes whether the adapter is currently running (1) and connected to the ESP3 devices (2). It's set to 0 on disconnect using a MQTT will.

MQTT Message format

The message format generated is a JSON encoded object with the following members:

• val - the actual value, in numeric format
• eno_srcid - when sending message, eno2mqtt fills in the source ID of the sending device. This field is ignored on incoming messages.
• eno_dbm - the RSSI value of the received message

EEP specifics

• F6-02
• F6-03

Rocker switches. Publishes state to subtopics "AI", "AO" etc. as either 1 for pressed or 0 for released. The published messages are not retained, as those are one-shot events. Dual-button presses are reported on the respective dual-button topic, e.g. "AIBI".

• F6-10-00

Window handle: val=0 down, val=1 left/right, val=2 up

Usage

Configuration options can either be specified on the command line, or as system properties with the prefix "eno2mqtt". Examples:

java -jar eno2mqtt.jar eno.esp3=/dev/ttyUSB0 eno.deviceList=devicelist.txt

java -Deno.esp3=/dev/ttyUSB0 -jar eno2mqtt.jar

Available options:

• eno.esp3

  One or more ESP3 devices to connect to (TCM310, USB300, Enocean PI etc.)

  Either a com port specification, or a network address in the form

  NET:host:port

  for a remote serial server. Multiple devices can be specified in a comma-separated list. Must be specified.

• eno.deviceList

  The device list file. Must be specified.

• eno.setRepeater

  Set the repeater mode of the TCM. Format is "mode,level". Mode can be OFF, ALL or FILTERED, level can be LEVEL1 or LEVEL2

• mqtt.server

  ServerURI of the MQTT broker to connect to. Defaults to "tcp://localhost:1883".

• mqtt.clientid

  ClientID to use in the MQTT connection. Defaults to "eno2mqtt".

• mqtt.topic

  The topic prefix used for publishing and subscribing. Defaults to "eno/".

When running eno2mqtt on a server class machine, it makes sense to limit the memory usage to 64MB using the java options

-Xmx64M

See also

• Project overview: https://github.com/mqtt-smarthome

Changelog

• 0.6 - 2015/07/28 - owagner

  • include timestamps ("ts") in generated JSON objects
  • updated minimal-json to 0.9.4 and eclipse-paho to 1.0.2

• 0.5 - 2015/03/19 - owagner

  • now properly supports multiple ESP3 connections. Will filter duplicate messages within 500ms.
  • changed state handling: will now retry failed connections every 10 seconds. Will keep running as long as there is at least one active connection within 15 seconds
  • made initial device list dump in log more readable
  • log sync errors
  • fixed setting repeater to OFF mode
  • relabeled all references to TCM310 to the even more accurate ESP3 designation

• 0.4 - 2015/03/15 - owagner

  • now sends RD_DUTYCYCLE every 60s and dumps a possible output, mostly as a serial-level keepalive

• 0.3 - 2015/03/14 - owagner

  • renamed property eno.usb300 to the more accurate eno.tcm
  • added eno.setRepeater to set the repeater mode of the TCM
  • more detailed log output about received frames (including dest ID, RSSI and status flags)
  • include RSSI value in generated messages

• 0.2 - 2015/03/12 - owagner

  • now supports F6-02 and F6-03 EEPs (rocker switches)

• 0.1 - 2015/03/11 - owagner

  • initial version