Sonoff RF Bridge 433

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Overview

Sonoff RF Bridge 433 is an ultra low power consumption device that can convert 433.92MHz (433MHz) to WiFi. It’s specially designed for mobile device and IoT application. It’s a bridge between 433MHz RF and WiFi, which helps to connect 433.92MHz supported devices to WiFi network, so that users can control the devices through App eWeLink.

Go shopping Sonoff RF Bridge 433 (SKU:IM170619001)

WIFI 2.4G Characteristics

  • Support wireless 802.11 b/g/n/d/e/i/k/r standard
  • Support STA/AP/STA+AP working modes
  • Support WPA/WPA2, PSK and WP
  • Built-in TCP/IP protocol stack
  • Support multi-channel TCP client connection
  • Support Wi-Fi Direct (P2P)
  • Multi-queue management, make full use of 802.11e-compliant QoS priority
  • Adaptive rate fallback algorithm sets the optimum transmission rate and Tx power based on actual SNR and packet loss information.


433.92MHz Wireless Characteristics

  • Complete monolithic UHF receive/transmit
  • Receive & transmit frequency: 433.92MHz
  • Receive sensitivity: -107dBm
  • Up to 10dBm transmit power
  • Transmission rate: 10kbps
  • Autotune without manual adjustment
  • Ultra low RF antenna radiation


Electrical Characteristics

The device is powered by micro USB cable, and it supplies power to the system through 3.3V LDO chip.

Rated Parameters

Power supply Micro USB:+5V
System:3.6V
I/O voltage VSS - 0.3 to VDD + 0.3
Node Temp. +150℃
Storage Temp. -40℃ to +125℃
Operating Temp. -40℃ to +125℃
Soldering Temp. 260℃

Technical Parameters

Name Type 433RFBridge
Chip ESP8285,EFM8BB1
Wi-Fi Wireless Standard IEEE 802.11b/g/n/d/e/i/k/r
Frequency 2.412GHz-2.484GHz
Transmit Power 802.11b: +20±2dBm (@11Mbps)
802.11g: +17±2dBm (@54Mbps)
802.11g: +14±2dBm (@HT20,MCS7)
Receiving Sensitivity 802.11b: -91 dBm (@11Mbps ,CCK)
802.11g: -75 dBm (@54Mbps, OFDM)
802.11n: -72 dBm (MCS7)
Antenna 2.4G onboard antenna
433.92M Working Frequency 433.92MHz
Demodulation Bandwidth 5000Hz
Transmit Power Transmitting mode: 12.5mA
Idle mode: 3mA
Standby mode: 1uA
Receive Current Continuous receiving mode: 3.9 ~ 4.5mA
Idle mode: 390uA
Standby mode: 0.9uA
Hardware Operating Voltage 3.0 ~ 3.6V
GPIO drive of main chip Max:12mA(ESP8285),12.5mA(EFM8BB1)
Operating Current Continue sending:70~200mA
Normal working:30~200mA
Stand-by mode:<200uA

Hardware

Rf bridge 433 hardware.png


Downloads

File:Sonoff_RF_Bridge_433_Schematic.SCH.pdf Sonoff RF Bridge 433 Schematic

Useful Links

User Manual:

Wi-Fi Socket/Switch Fail to be Controlled Troubleshooting

Features wanted, bug report and discuss in Itead Smart Home Forum