The SONOFF 4CH Pro is a case that allows to control up to 4 relays in WiFi and radio waves (433MHz). It can be installed in a control cabinet using a DIN rail adapter. The Sonoff 4CH Pro is built around an Espressif ESP8285 WiFi module, well known in DIY home automation.
Itead, the manufacturer of the Sonoff products, left the door open to do-it-yourselfers by placing on the PCB the location to weld a serial connector. Compared to his younger brother, the Sonoff 4CH, the Pro also has a 433MHz receiver. It is possible to control the relays from a remote control (the procedure is explained in paragraph 4 here) and probably from a home automation server using the RFLink gateway (to be tested …).
Each relay can power a device in 220V / 10A (max. 2200W). Be careful not to exceed 16A on the total of 4 relays, which is more than enough for most home automation applications.
Several operating modes are available, which can be selected with the help of a DIP switch S6 (Work mode switch). To access the various selectors, the housing must be opened.
- 1 Differences between SONOFF 4CH and 4CH Pro
- 2 3 operating mode
- 3 Best offers for Sonoff 4CH Pro on the Internet
- 4 History of the best deals on Amazon
- 4.0.1 Sonoff Smart Home 4CH Pro 4 Gang 4 Way RF-WiFi 433Mhz Wireless Remote Control Timer Switches, Sonoff
- 4.0.2 Aotejia Sonoff 4CH Pro 4 Gang 433MHZ Mounting Wireless Control WIFI Smart Switch Home Light Alexa Remote 10A white, Aotejia
- 4.0.3 Sonoff 4CH Pro 4 Gang 433MHZ Montage Wireless Control WIFI Smart Switch Home Licht Alexa Remote 10A, Mengonee
- 5 Comparison of Itead Swich Smart Home Sonoff
- 5.1 #Deal: Sonoff Basic, WiFi smart switch compatible Google Home,...
- 5.2 #Deal: Sonoff RF, 1x WiFi and RF 433MHz smart switch relay com...
- 5.3 #Deal: Sonoff DUAL, WiFi smart switch 2 relays compatible Goog...
- 5.4 #Deal: Sonoff POW, WiFi smart switch module with power consump...
- 5.5 #Deal: Sonoff TH10, WiFi smart switch 1x 10A relay with temper...
- 5.6 #Deal: Sonoff TH16, WiFi smart switch 1x 16A relay with temper...
- 5.7 #Deal: SONOFF 4CH: 4x smart switch relays for mounting on DIN ...
- 5.8 #Deal: Sonoff 4CH PRO, 4x smart switch relays with WiFi and ra...
Differences between SONOFF 4CH and 4CH Pro
Here is a comparison table of the main features of SONOFF 4CH and 4CH Pro.
|Module WiFi||ESP8285||ESP8285 + STM32|
|Récepteur radio 433MHz||–||Oui|
|Relais 230V/16A||4||4 relais isolés|
|Fiche technique||Wiki Itead||Wiki Itead|
3 operating mode
The SONOFF 4CH Pro offers 3 modes of operation.
- Interlock mode: Only one relay can be activated at a time. For example, if R1 is activated, when R2 is activated (manually u from the app), R1 is deactivated and R2 is activated. This is the default mode for unpacking.
Provided by: Itead
- Self-locking mode: Each relay can be switched on and off independently.
Provided by: Itead
- Inching mode: Each relay is activated for a duration set by the K6 (delay) selector when activated from the appliance, the control knob or a 433MHz remote control. It is very useful to control the opening of a gate or the electric trigger of a gate.
Provided by: Itead
For more details on the start-up of Sonoff 4CH, here are some articles
Best offers for Sonoff 4CH Pro on the Internet
History of the best deals on Amazon
Sonoff Smart Home 4CH Pro 4 Gang 4 Way RF-WiFi 433Mhz Wireless Remote Control Timer Switches, Sonoff
Aotejia Sonoff 4CH Pro 4 Gang 433MHZ Mounting Wireless Control WIFI Smart Switch Home Light Alexa Remote 10A white, Aotejia
Sonoff 4CH Pro 4 Gang 433MHZ Montage Wireless Control WIFI Smart Switch Home Licht Alexa Remote 10A, Mengonee
Comparison of Itead Swich Smart Home Sonoff
Technical specifications are subject to change by manufacturers at any time without notice.
Smart Home: Actuator
Brand | manufacturer: Sonoff Itead
SoC | Arduino | ESP8266 | ESP32 : ESP8266 | ESP8285
Radio (433MHz, LoraWan, Sigfox...) | GPRS
Max. Power: 2200W / 10A
Compatible: Amazon Alexa, Google Home, Nest
Output | Relay: 4
Power supply: 90-250VAC + 5-24CDC