RFX-433EMC Transceiver
RFX-433EMC Transceiver
Thank you for supporting a US-based small business!
Out of Stock!
Couldn't load pickup availability
Free standard shipping on US orders over $150
Add $150 to your cart to unlock free standard shipping.
US orders only. Excludes oversized, freight, and bulk orders. Not combinable with other discounts. Expedited shipping not included. CircuitMess items do not count toward free shipping.
Description ▼
RFXCOM RFX-433EMC
The RFX-433EMC is a 433 MHz USB / Wi-Fi / MQTT transceiver that bridges older RF devices into Home Assistant and other local controllers. It sends and receives on 433.92 MHz (and 433.42 MHz for Somfy RTS / Funkbus). The built-in EMC chip adds bidirectional motor support that the plain RFX-433 does not have. No cloud.
KEY FEATURES
- Transmit and receive on 433.92 MHz
- 433.42 MHz transmit for Somfy RTS and Funkbus
- USB-C, onboard Wi-Fi, and MQTT with auto-discovery
- Works with Home Assistant, Domoticz, OpenHAB, HomeSeer, Node-RED, and any MQTT broker
- Extended Motor Control for bidirectional Brel / Dooya / Motionblinds, Cherubini, and Ozroll
- Also covers switches, remotes, and many weather sensors (Oregon, La Crosse, FineOffset, and others)
- Local only — no vendor cloud
- ESP32-S3 firmware, field-updatable (Type 6)
- Made in the Netherlands
SPECIFICATIONS
| Category | Details |
|---|---|
| Model | RFXCOM RFX-433EMC |
| Receive | 433.92 MHz |
| Transmit | 433.92 MHz (most protocols) 433.42 MHz (Somfy RTS / Funkbus) |
| Modes | Send and receive |
| Interfaces | USB-C serial (RFXCOM protocol) Wi-Fi 802.11 b/g/n MQTT with Home Assistant auto-discovery Optional W5500 LAN module (sold separately) |
| EMC motors | Bidirectional Brel, Dooya, Motionblinds, mhz.de, Gaviota Elite, Cherubini, Ozroll |
| Also used for | Somfy RTS (not Somfy IO / 868) KlikAanKlikUit / Chacon / Nexa / ELRO / X10 style switches Oregon, La Crosse, Cresta, FineOffset weather sensors |
| Controller | ESP32-S3 + EMC secure microcontroller |
| Power | 5 V USB-C About 0.14 W typical Use a solid 5 V supply (2 A or better recommended for Wi-Fi / MQTT) |
| Software | RFX433 firmware Type 6 (USB / Wi-Fi / LAN / MQTT builds) RFXmngr on Windows for pairing and testing (not used with MQTT firmware) |
| Certifications | CE, RoHS |
What's Included:
- 1 × RFXCOM RFX-433EMC transceiver
- 1 × USB-C cable
NOTES
- No power adapter and no external antenna in the box. A magnetic-base 433 MHz antenna and a 5 V USB-C supply are optional
- Somfy IO (868 MHz) is not supported. Somfy RTS is
- Pair bidirectional motors as an extra remote. You cannot clone the original rolling-code remote ID
- Enable only the receive protocols you need — extra decoders cut sensitivity
- MQTT firmware and RFXmngr are not used at the same time. Flash the USB build for RFXmngr, or the MQTT build for Home Assistant auto-discovery
- This is not an RFXtrx433 / RFX433XL. Those older units use different firmware
Recommended Accessories ▼
Bundle Deals▼
Let’s Connect! We’re a small business passionate about helping you achieve your goals of comfort, privacy, and security with Home Assistant, Single Board Computers, and more. Get in touch for a free consultation or just a fun chat about what’s possible—we’ll do our best to guide you in the right direction and get you the best deal! As a small team, we’ll strive to be available or get back to you as soon as possible.
SKU:
View full details
