RFXCOM RFX-433EMC - 433.92 MHz transceiver | USB/WiFi/MQTT

RFXCOM RFX-433EMC: The ultimate universal 433 MHz bridge with Extended Motor Control

Do you have roller shutters, awnings, wireless switches, or weather stations operating at 433.92 MHz? Think Somfy RTS, Cherubini, Ozroll, Brel, KlikAanKlikUit, or Oregon Scientific? With the modern RFXCOM RFX-433EMC, you get a powerful universal transceiver to seamlessly, stably, and fully locally integrate this 'legacy' and modern equipment into Home Assistant or Domoticz.

⚠️ Note the frequency (Selection Guide): This is the 433.92 MHz version with Extended Motor Control. Are you looking for the transceiver for mechanical ventilation (Orcon, Itho Daalderop, Zehnder), Honeywell thermostats, or Kopp Free-Control (868 MHz)? Then check out the RFXCOM RFX-868 Transceiver.

Selection Guide: 433.92 MHz vs. 868 MHz

Choosing the correct frequency is essential for the proper functioning of your smart devices. The comparison below helps in making the right choice:

What makes the EMC version unique?

• Built-in Extended Motor Control (EMC): The RFX-433EMC includes advanced protocol support for special motors such as Cherubini and Ozroll, including bidirectional feedback (DD27xx) for roller blinds and screens.
• Transmit and receive (Transceiver): This module not only listens to sensors (such as temperature, wind, and rain gauges) but can also send active commands itself to control motors, roller shutters, and switches.
• Built-in Wi-Fi & MQTT Auto Discovery: No mandatory USB cable directly into your server. Thanks to Wi-Fi, you can place the transceiver in the most central spot in your home for optimal range. Via MQTT, learned devices automatically appear as entities in Home Assistant.
• 100% Local & Privacy-first: No cloud, no external servers, and no subscriptions. All communication remains local within your own network.

European Compatibility Guide: What works and what doesn't at 433 MHz?

The 433 MHz frequency is used by hundreds of brands. Below is the exact overview of tested brands and protocols supported by the RFX-433EMC:

1. Awnings, Roller Shutters & Window Coverings

• Somfy RTS & Simu (433.42 MHz): ✅ Yes, works perfectly. Suitable for Somfy RTS and Simu motors for articulated awnings, roller shutters, and garage doors.
  ❌ Note: Somfy io-homecontrol (868 MHz) uses a closed, encrypted protocol and does not work on universal transceivers.
• Cherubini & Ozroll: ✅ Yes, 100% supported via Extended Motor Control. Specifically supported on RFXCOM's EMC platform for precise control of screens and roller shutters.
• Brel, Dooya & MotionBlinds (Coulisse): ✅ Yes, works perfectly. Supports both traditional RF motors and bidirectional motors (DD27xx protocol) for exact position feedback in Home Assistant.
  ❌ Note: The newer Eve MotionBlinds work via Bluetooth / Thread (2.4 GHz) and are not compatible.
• A-OK, TUBE & Gaviota Elite: ✅ Yes. Commonly used OEM tubular motors for awnings and screens are directly supported.
• Luxaflex (PowerView): ❌ No. Modern Luxaflex PowerView works via 2.4 GHz or Bluetooth/Thread and requires the official Luxaflex Hub. (Older Luxaflex systems with a Somfy RTS motor do work on the RFX-433EMC).

2. Switches, Dimmers & Smart Plugs

• KlikAanKlikUit (KaKu) / Trust / Nexa: ✅ Yes, 100% support. Supports both the older ARC protocol (with rotary dials) and the modern AC protocol with automatic code learning.
• DiO Home / Chacon: ✅ Yes. Popular switching modules and smart plugs from Belgium and France work directly plug-and-play.
• X10 & Intertechno: ✅ Yes. Full support for wireless X10 RF signals and Intertechno switching equipment.
• ELRO, HomeEasy & Flamingo: ✅ Yes. Affordable plug sets and wireless switches from DIY stores can be easily controlled.

3. Weather Stations & Environmental Sensors (Reception)

• Oregon Scientific: ✅ Yes. All known V1, V2, and V3 protocols of Oregon temperature, humidity, wind, and rain sensors are received.
• La Crosse Technology: ✅ Yes. Commonly used 433 MHz La Crosse sensors are automatically read out.
• TFA Dostmann & Cresta: ✅ Yes. Popular European weather sensors at 433.92 MHz transmit their data directly to your smart home.
• Ecowitt & Sonoff Plant Sensors: ❌ No. European Ecowitt sensors work at 868 MHz (see our RFX-868). Sonoff plant and soil sensors communicate via Zigbee or Bluetooth.

4. Garden, Patio & Outdoor Living

Supported outdoor applications include:

• Outdoor Sockets & Lighting: Switch garden lighting and pond pumps from KlikAanKlikUit (Trust Outdoor), Smartwares, and DiO Home.
• Patio Awnings & Heaters: Control electric articulated awnings and patio heaters with built-in Somfy RTS, Cherubini, or Brel receivers.
• Weather Stations: Link rain and wind sensors to automatically protect your home during storms or extreme rainfall.

❌ Note: Soil sensors and irrigation computers from Gardena (Smart System) work at 868 MHz via their own gateway.

Smart automations in practice

Smart storm protection: Connect an affordable 433 MHz weather station to your installation. As soon as the wind meter registers a strong gust of wind, your smart home server sends a signal via the RFX-433EMC directly to your Somfy RTS or Cherubini awning to safely retract it.

Automated sun protection: Have your Brel, MotionBlinds, or Ozroll roller blinds automatically lower based on the sun's position and indoor temperature, without ever having to search for a separate remote control again.

Complete your setup

Don't have a central server running yet to connect this transceiver to? Discover our ready-to-use Home Assistant Servers as the foundation of your smart home. If you prefer to use it traditionally via USB directly next to your hub, you might want to order a USB hub to create extra ports.

Technical specifications

Package contents

• Quantity: 1x RFXCOM RFX-433EMC Transceiver
• Cable: 1x USB-C to USB-A cable

Downloads & Useful Documentation

Get started right away with the official manuals, integration guides, and software from RFXCOM:

Official Manuals (PDF)

• Manual EN: RFXCOM General User Guide (PDF) – The complete manual with all technical details and protocols.
• Integration Guide HA: Home Assistant USB Integration Guide (PDF) – Step-by-step guide to connect the RFXCOM via USB.

MQTT & Wi-Fi manuals (Specifically for the RFX-433EMC)

• Step-by-step HA: RFXCOM MQTT in Home Assistant Guide (PDF) – The guide to setting up the Wi-Fi and MQTT functions of this EMC version.
• MQTT Manual: General RFXCOM MQTT Manual (PDF) – All about the MQTT structure and commands.
• Homey Funkbus: Homey Funkbus MQTT Integration Guide (PDF) – For advanced Homey Pro users via MQTT.

Software & Tools (.zip)

• Configuration Software: RFXmngr Software (Windows) – The tool to configure the RFXCOM, update firmware, and test signals live.
• Software Suite: General RFX-433 Software Suite – The complete software bundle for the 433 MHz version.

Frequently Asked Questions (FAQ)

How do I connect the RFX-433EMC to Home Assistant?

When connected via USB, Home Assistant connects directly via the built-in RFXCOM integration. When using Wi-Fi, the module communicates via MQTT. Thanks to MQTT Auto Discovery, newly learned devices appear directly as entities on your dashboard.

Does the RFX-433EMC support Cherubini and Ozroll motors?

Yes, absolutely! The RFX-433EMC features built-in Extended Motor Control. This allows specific motors from brands like Cherubini and Ozroll to be controlled directly locally from Home Assistant.

Can I also control mechanical ventilation like Orcon or Itho Daalderop with the RFX-433EMC?

No, wireless mechanical ventilation (Orcon, Itho Daalderop, Zehnder) almost always communicates on the 868 MHz frequency. For that, you need the RFXCOM RFX-868 Transceiver.

Do I need to enable all protocols at once?

No, it is an important best practice to only select the protocols you actually have in your home. If you activate too many protocols at once, the antenna will pick up ambient noise (such as your neighbor's thermometer), which will reduce responsiveness.

Does this module also work with Homey Pro?

The RFX-433EMC is primarily designed for open systems such as Home Assistant and Domoticz via USB or MQTT. Because Homey Pro already has its own (more limited) built-in 433 MHz antenna, there is no official, direct app from the manufacturer available for Homey. For advanced users, connection via an MQTT broker is possible.

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