RFLink


The rflink component support devices that use RFLink gateway firmware, for example the Nodo RFLink Gateway. RFLink gateway is an Arduino Mega firmware that allows two-way communication with a multitude of RF wireless devices using cheap hardware (Arduino + transceiver).

The 433 MHz spectrum is used by many manufacturers mostly using their own protocol/standard and includes devices like: light switches, blinds, weather stations, alarms and various other sensors.

RFLink Gateway supports a number of RF frequencies, using a wide range of low-cost hardware. Their website provides details for various RF transmitter, receiver and transceiver modules for 433MHz, 868MHz and 2.4 GHz here.

Note: Versions later than R44 adds support for Ikea Ansluta, Philips Living Colors Gen1, MySensors devices.

A complete list of devices supported by RFLink can be found here

This component is tested with the following hardware/software:

  • Nodo RFLink Gateway V1.4/RFLink R46

To enable RFLink in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
rflink:
  port: /dev/serial/by-id/usb-id01234

Configuration variables:

  • port (Required): The path to RFLink USB/serial device or TCP port in TCP mode.
  • host (Optional): Switches to TCP mode, connects to host instead of to USB/serial.
  • wait_for_ack (Optional): Wait for RFLink to acknowledge commands sent before sending new command (slower but more reliable). Defaults to True
  • ignore_devices (Optional): List of devices id’s to ignore. Supports wildcards (*) at the end.
  • reconnect_interval (Optional): Time in seconds between reconnect attempts.

Complete example:

# Example configuration.yaml entry
rflink:
  port: /dev/serial/by-id/usb-id01234
  wait_for_ack: False
  ignore_devices:
    - newkaku_000001_01
    - digitech_*

TCP mode

TCP mode allows connect to a RFLink device over TCP/IP network. This is for example useful if placing the RFLink device next to the HA server is not optimal or desired (eg: bad reception).

To expose the USB/serial interface over TCP on a different host (Linux) the following command can be used:

$ socat /dev/ttyACM0,b57600 TCP-LISTEN:1234,reuseaddr

Other methods of exposing the serial interface over TCP are possible (eg: ESP8266 or using Arduino Wifi shield). Essentially the serial stream should be directly mapped to the TCP stream.

Tested with Wifi serial bridge esp-link V2.2.3 running on a NodeMCU (ESP8266 Wifi module) with ESP8266 TXD0 (pin D10) and RXD0 (pin D9) connected to Arduino MEGA 2560 RX (Pin 2) and TX (Pin 3) respectively.

Due to different logic levels, a voltage level shifter is required between the 3.3V NodeMCU and 5V Arduino MEGA 2560 pins. The BSS138 bidirectional logic level converter has been tested for serial pins and the link is recommended for the CC2500 transceiver (used for Ikea Ansluta and Living Colors)

When re-flashing the Arduino MEGA, disconnect the ESP8266 to avoid programming difficulties.

# Example configuration.yaml entry
rflink:
  host: 192.168.0.10
  port: 1234

Adding devices Automatically

In order to have your devices being detected and added automatically, you need to add the following to the configuration. When pressing the button on the physical remote, RFLink detects the signal and the device should be added automatically to Home Assistant.

light:
  - platform: rflink
    automatic_add: true
switch:
  - platform: rflink
    automatic_add: true
sensor:
  - platform: rflink
    automatic_add: true

Ignoring devices

RFLink platform can be configured to completely ignore a device on a platform level. This is useful when you have neighbors which also use 433 MHz technology.

For example:

# Example configuration.yaml entry
rflink:
  port: /dev/serial/by-id/usb-id01234
  wait_for_ack: False
  ignore_devices:
    - newkaku_000001_01
    - digitech_*
    - kaku_1_*

This configuration will ignore the button 1 of the newkaku device with ID 000001, all devices of the digitech protocol and all switches of the kaku protocol device with codewheel ID 1.

Wildcards only work at the end of the ID, not in the middle of front!

Device support

Even though a lot of devices are supported by RFLink, not all have been tested/implemented. If you have a device supported by RFLink but not by this component please consider testing and adding support yourself or create an issue and mention @aequitas in the description.

Device Incorrectly Identified

If you find a device is recognized differently, with different protocols or the ON OFF is swapped or detected as two ON commands, it can be overcome with the RFLink ‘RF Signal Learning’ mechanism from RFLink Rev 46 (11 March 2017). Link to further detail.

Technical overview

  • Therflink Python module a asyncio transport/protocol is setup that fires an callback for every (valid/supported) packet received by the RFLink gateway.
  • This component uses this callback to distribute ‘rflink packet events’ over Home Assistant’s bus which can be subscribed to by entities/platform implementations.
  • The platform implementation takes care of creating new devices (if enabled) for unseen incoming packet id’s.
  • Device entities take care of matching to the packet ID, interpreting and performing actions based on the packet contents. Common entity logic is maintained in this main component.

Debug logging

For debugging purposes or context when investigating issues you can enable debug logging for Rflink with the following config snippet:

logger:
  default: error
  logs:
    rflink: debug
    homeassistant.components.rflink: debug

This will give you output looking like this:

17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] received data: 20;00;Nod
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] received data: o RadioFrequencyLink - R
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] received data: FLink Gateway V1.1 - R45
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] received data: ;
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] got packet: 20;00;Nodo RadioFrequencyLink - RFLink Gateway V1.1 - R45;
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] decoded packet: {'firmware': 'RFLink Gateway', 'revision': '45', 'node': 'gateway', 'protocol': 'unknown', 'hardware': 'Nodo RadioFrequencyLink', 'version': '1.1'}
17-03-07 20:12:05 DEBUG (MainThread) [rflink.protocol] got event: {'version': '1.1', 'firmware': 'RFLink Gateway', 'revision': '45', 'hardware': 'Nodo RadioFrequencyLink', 'id': 'rflink'}
17-03-07 20:12:05 DEBUG (MainThread) [homeassistant.components.rflink] event of type unknown: {'version': '1.1', 'firmware': 'RFLink Gateway', 'revision': '45', 'hardware': 'Nodo RadioFrequencyLink', 'id': 'rflink'}