RFXCOM RFXtrx


The RFXtrx integration supports RFXtrx devices by RFXCOM, which communicate in the frequency range of 433.92 MHz.

There is currently support for the following device types within Home Assistant:

Configuration

To add RFXtrx integration go to Configuration >> Integrations and find the integration in the list. Choose between Serial or Network. For network configure host and port. For serial, a list of detected devices is presented. Choose the RFXCOM device or select Enter Manually to fill in the USB path manually.

To receive debug logging from the RFXCOM device, add the following lines to configuration.yaml:

logger:
  logs:
    RFXtrx: debug

Please note: RFXtrx is case-sensitive.

Supported protocols

Not all protocols as advertised are enabled on the initial setup of your transceiver. Enabling all protocols is not recommended either. Your 433.92 product not showing in the logs? Visit the RFXtrx website to download RFXmgmr and enable the required protocol.

ser2net

You can host your device on another computer by setting up ser2net and example configuration for ser2net looks like this and then using host/port in your Home Assistant configuration.

50000:raw:0:/dev/ttyUSB0:38400 8DATABITS NONE 1STOPBIT

Settings options

To configure options for RFXtrx integration go to Configuration >> Integrations and press Options on the RFXtrx card.

Automatic add

In the options menu, select Enable automatic add to enable automatic addition of detected devices. This is the easiest way to detect binary sensors, sensors or switches from a physical device. Once automatic add is enabled, newly detected devices are automatically added and can be found by clicking devices on the RFXtrx integration card.

Covers

The RFXtrx integration supports Siemens/LightwaveRF and RFY roller shutters that communicate in the frequency range of 433.92 MHz.

Lights

The RFXtrx integration support lights that communicate in the frequency range of 433.92 MHz.

Make sure you trigger a dimming command to get switches detected as lights otherwise, they will show up as switches.

Switches

The RFXtrx integration support switches that communicate in the frequency range of 433.92 MHz.

Sensors

The RFXtrx integration support sensors that communicate in the frequency range of 433.92 MHz.

Also, several switches and other devices will also expose sensor entities with battery status as well as the signal level.

Binary Sensors

The RFXtrx integration support binary sensors that communicate in the frequency range of 433.92 MHz. The RFXtrx binary sensor integration provides support for them. Many cheap sensors available on the web today are based on a particular RF chip called PT-2262. Depending on the running firmware on the RFXcom box, some of them may be recognized under the X10 protocol, but most of them are recognized under the Lighting4 protocol. The RFXtrx binary sensor integration provides some special options for them, while other RFXtrx protocols should work too.

Add a device by event code

To manually add a device, in the options window, an event code can be added in the field Enter event code to add.

See Generate codes how to generate event codes.

RFY

The RFXtrx433e is required for RFY support, however, it does not support receive for the RFY protocol - as such devices cannot be automatically added. Instead, configure the device in the rfxmngr tool. Make a note of the assigned ID and Unit Code and then add a device to the configuration with the following id 071a0000[id][unit_code]. E.g., if the id was 0a 00 01, and the unit code was 01 then the fully qualified id would be 071a00000a000101, if you set your id/code to single digit in the rfxmngr, e.g., id: 1 02 04 and unit code: 1 you will need to add 0 before, so 102031 becomes 071a000001020301.

Convert switch event to dimming event

To convert a standard switch to a light, use the Light Switch component.

To convert a switch to a dimmable light, make sure the event contains a dimming command. You can usually convert a command by changing one byte.

Copy the event code from the state attribute of the switch, which shows up on the bottom of the window when clicking on the switch entity. Examples of byte changes:

ARC:
0b11000248bc0cfe09 01 0f70
0b11000248bc0cfe09 02 0f70

LightwaveRF:
0a14000101f20302 01 0080
0a14000101f20302 10 0080

Waveman:
710030e4102 01 50
710030e4102 02 50

Configure device options

To configure device options, select a device from the list under Select device to configure. After pressing Submit a window with device options are presented based on the device type.

If a device is missing from the list, close the options window and either make sure the device sents a command or manually re-add the device by event code.

Signal repetitions

Because the RFXtrx device sends its actions via radio and from most receivers it’s impossible to know if the signal was received or not. Therefore you can configure the RFXtrx device to try to send each signal repeatedly.

Device events

To enable device events, use the checkbox Enable device event. See Events for more information about device events.

Off Delay

Binary sensors have only two states - “on” and “off”. Many door or window opening sensors will send a signal each time the door/window is open or closed. However, depending on their hardware or on their purpose, some sensors are only able to signal their “on” state:

  • Most motion sensors send a signal each time they detect motion. They stay “on” for a few seconds and go back to sleep, ready to signal other motion events. Usually, they do not send a signal when they go back to sleep.
  • Some doorbells may also only send “on” signals when their toggle switch is pressed, but no “off” signal when the switch is released.

For those devices, use the off_delay parameter. It defines a delay after, which a device will go back to an “Off” state. That “Off” state will be fired internally by Home Assistant, just as if the device fired it by itself. If a motion sensor can only send signals once every 5 seconds, sets the off_delay parameter to seconds: 5.

Options for PT-2262 devices under the Lighting4 protocol

When a data packet is transmitted by a PT-2262 device using the Lighting4 protocol, there is no way to automatically extract the device identifier and the command from the packet. Each device has its own id/command length combination and the field lengths are not included in the data. One device that sends 2 different commands will be seen as 2 devices on Home Assistant. For such cases, the following options are available in order to circumvent the problem:

  • data_bits
  • command_on
  • command_off

Let’s try to add a new PT-2262 sensor using the “automatic_add” option and have a look at Home Assistant system log.

Have your sensor trigger the “On” state for the first time. Some messages will appear:

INFO (Thread-6) [homeassistant.components.binary_sensor.rfxtrx] Added binary sensor 0913000022670e013970 (Device_id: 22670e Class: LightingDevice Sub: 0)

Here the sensor has the id 22670e.

Now have your sensor trigger the “Off” state and look for the following message in the Home Assistant log. You should see that your device has been detected as a new device when triggering its “Off” state:

INFO (Thread-6) [homeassistant.components.binary_sensor.rfxtrx] Added binary sensor 09130000226707013d70 (Device_id: 226707 Class: LightingDevice Sub: 0)

Here the device id is 226707, which is almost similar to the 22670e we had on the “On” event a few seconds ago.

From those two values, you can guess that the actual id of your device is 22670, and that e and 7 are commands for “On” and “Off” states respectively. As one hexadecimal digit uses 4 bits, we can conclude that the device is using 4 data bits.

So, here is the actual configuration section for the binary sensor:

data_bits: 4
command_on: 0xe
command_off: 0x7

The automatic_add option makes the RFXtrx binary sensor integration calculate and display the configuration options for you in the Home Assistant logs:

INFO (Thread-6) [homeassistant.components.rfxtrx] rfxtrx: found possible device 226707 for 22670e with the following configuration:
data_bits=4
command_on=0xe
command_off=0x7
INFO (Thread-6) [homeassistant.components.binary_sensor.rfxtrx] Found possible matching deviceid 22670e.

This automatic guess should work most of the time, but there is no guarantee on that. You should activate it only when you want to configure your new devices and leave it off otherwise.

Replace device

Some battery-powered devices send commands or data with a randomly generated id. When batteries are replaced, the id changes. In order to use the device, it needs to be re-added either through automatic add or manually. This will create a new device. To transfer user-configured names and entity ids of the old device, select the old device in the options menu under Select device to configure. In the device options menu, select from the Select device to replace menu the new device and press Submit. The names and ids of the old device will be transferred to the new device and the old device will be automatically deleted.

Delete device

To delete device(s) from the configuration, select one or more devices under Select device to delete. Press Submit to delete the selected devices.

Events

The RFXtrx integration will signal an event on the reception of messages from and RFXtrx device on the following form. For the signal to be available, the fire_event parameter must be set on the device in configuration.

Signal from a byron doorbell button:

packet_type: 22
sub_type: 0
type_string: "Byron SX"
id_string: "00:90"
data: "0716000100900970"
values:
  Sound: 9
  Battery numeric: 0
  Rssi numeric: 7

Event data from a Nexa wall socket switch:

packet_type: 16
sub_type: 1
type_string: 'ARC'
id_string': 'C3'
data: '0710010143030170'
values': 
  Command: 'On'
  Rssi numeric': 7

You can set up automations to react to these events. When you do, don’t include more fields than needed. Always include the device identifying fields, packet_type, sub_type and id_string.

So, for example, to trigger an action when somebody presses the doorbell, you would set up an automation with the following trigger:

Automation trigger:

- platform: event
  event_type: rfxtrx_event
  event_data:
    packet_type: 22
    sub_type: 0
    id_string: "00:90"
    values:
      Sound: 9

A more complete example with scene activation:

light:
  platform: demo

scene:
  name: WelcomeScene
  entities:
    light.bed_light: on
    light.ceiling_lights: off

automation:
  - alias: Use doorbell button to trigger scene
    trigger:
    - platform: event
      event_type: rfxtrx_event
      event_data:
        packet_type: 22
        sub_type: 0
        id_string: "00:90"
        values:
          Sound: 9
    action:
      service: scene.turn_on
      entity_id: scene.welcomescene

Services

  • rfxtrx.send: Send a custom event using the RFXtrx device.

Service: Send

Simulate a button being pressed:

...
action:
  service: rfxtrx.send
  data:
    event: 0b1111e003af16aa10000060

Generate codes

If you need to generate codes for switches and lights, you can use a template (useful, for example, COCO switches).

  • Go to home-assistant-IP:8123/dev-template
  • Use the following codes to generate an event:

Switch: ARC

0b11000{{ range(100,700) | random | int }}bc0cfe0{{ range(0,10) | random | int }}010f70

Light: ARC

0b11000{{ range(100,700) | random | int }}bc0cfe0{{ range(0,10) | random | int }}020f70

Light: Lightwave RF

0a14000{{ range(100,700) | random | int }}bc0cf{{ range(0,10) | random | int }}100f70
  • Use this code to add a new switch in the options menu.
  • Launch your Home Assistant and go to the website.
  • Enable learning mode on your switch (i.e., push learn button or plug it in a wall socket)
  • Toggle your new switch in the Home Assistant interface

Configuration import

When RFXtrx integration is configured in configuration.yaml, the configuration will be imported once. After import, the configuration can be removed from configuration.yaml.

Configuration Variables

device string (Optional)

The path to your device, e.g., /dev/serial/by-id/usb-RFXCOM_RFXtrx433_A1Y0NJGR-if00-port0 or /dev/ttyUSB0. Required if you are using a locally connected USB device.

host string (Optional)

The hostname the remote RFXtrx is available on if connecting via TCP. If this is set, a port is required.

port integer (Optional)

The TCP port the remote RFXtrx is available on. If this is set, a host is required.

debug boolean (Optional, default: false)

If you want to receive debug output.

devices map (Optional)

A list of devices.

EVENT_CODE map Required

An code string describing the device. It may include state, but state will be ignored.

device_class device_class (Optional)

Sets the class of the device, changing the device state and icon that is displayed on the frontend.

fire_event boolean (Optional, default: false)

Fires an event even if the state is the same as before. Can be used for automations.

off_delay integer (Optional)

For binary sensors that only sends ‘On’ state updates, this variable sets a delay after which the binary sensor state will be updated back to ‘Off’.

data_bits integer (Optional)

Defines how many bits are used for commands inside the data packets sent by the device.

command_on string (Optional)

Defines the data bits value that is sent by the device upon an ‘On’ command.

command_off string (Optional)

Defines the data bits value that is sent by the device upon an ‘Off’ command.

signal_repetitions integer (Optional)

Because the RFXtrx device sends its actions via radio and from most receivers it’s impossible to know if the signal was received or not. Therefore you can configure the RFXtrx device to try to send each signal repeatedly.

automatic_add boolean (Optional, default: false)

To enable the automatic addition of new binary sensors.

If a device ID consists of only numbers, please make sure to surround it with quotes. This is a known limitation in YAML, because the device ID will be interpreted as a number otherwise.