Sonoff 4CH Pro

Overview

Sonoff 4CH Pro is an ESP8285 WiFi module based 4 channel (4-way) WiFi wireless switch. It integrates with MCU ST32F030C6 and 433MHz receiver. Sonoff 4CH Pro supports to connect and control 4 home appliances, which can be separately turned on/off by app eWeLink and 433MHz remote. Users can switch among 3 modes: self-locking mode, inching mode and interlock mode. In self-locking mode, users can turn on/off the 4 connected devices independently. In inching mode, users can turn on connected devices for 0.25-4s(Sonoff 4CH Pro) or 1-16s (Sonoff 4CH Pro R2). In interlock mode, users can turn on 1 device every time, and turn off other devices at the same time.

The enclosure supports din-rail mount! A DIN rail is a metal rail of a standard type widely used for mounting circuit breakers and industrial control equipment inside equipment racks.

Sonoff 4CH Pro is hacker-friendly! You can flash external firmware!

Go shopping Sonoff 4CH Pro

Features

Support independently turn on/off 4 home appliances
Support to turn on/off home appliances by local toggle buttons
Support tracking device status and remote control through APP
Support control by 433MHz remote indoor
Support switching among self-locking mode, inching mode and interlock mode
Support countdown timer and scheduled timer
Support share control

Electrical Characteristics

Voltage range: 90-250v AC(50/60Hz) /5-24v DC
Max current: 10A/chnl
Max Power: 2200W/chnl
Wireless Frequency: 2.4Ghz
Operating Temperature(recommended): 0ºC-40ºC(32°F-104°F)
Operating Humidity: 5%-90%RH, Non-condensing
Max soldering temperature: 260℃

Wiring Instruction

L-In: Input LIVE

To enter into WiFi pairing state, you should press and hold one of CH1, CH2, CH3, CH4 buttons until the WiFi LED blinks 3 times repeatedly.

L1,L2,L3,L4 port respectively connects to LIVE of CH1, CH2, CH3, CH4.

You can randomly connects to any of the five N port and 5 GND port for your devices.

WIFI Characteristics

• 802.11 b/g/n

• Built-in 10-bit high accuracy ADC

• Built-in TCP/IP protocol stack

• Built-in TR switch, balun, LNA, power amplifier and matching network

• Built-in PLL, voltage regulator and power supply management components, 802.11b mode +20 dBm output power

• A-MPDU&A-MSDU aggregation and 0.4μs guard interval

• Support antenna diversity

• Built-in ultra-low power 32-bit MCU, also work as application processor

• SDIO 2.0、SPI、UART

• STBC、1x1 MIMO、2x1 MIMO

• WiFi @ 2.4 GHz, supports WPA / WPA2 safe mode

• 2ms, connect and transfer data packets

• Other parameters are as follows

Category	Parameters	Description
Wireless Parameter	Wireless standard	802.11 b/g/n
	Frequency range	2.4G-25G(2400M-2483.5M)
	Tx Power	802.11b: 20dBm
		802.11g: 17dBm
		802.11n: 14dBm
	Rx Sensitivity	802.11b: (11Mbps)-91dbm
		802.11g: (54Mbps)-75dbm
		802.11n: (MCS7)-72dbm
Software Parameter	Wireless network types	Station/softAP/softAP+station
	Security	WPA/WPA2
	Encryption	WEP/TKIP/AES
	Firmware Upgrade	UART Download / OTA (via network)
	Network Protocols	IPv4、TCP/UDP/HTTP/FTP
	User configuration	AT+ instruction set

Specification

PCBA Size:122.2*87.2*1.2mm

Product Size: (L)14.5*(W)9.5*(H)4cm

Hardware

Working Mode

Sonoff 4CH Pro supports to work 3 modes: self-locking mode, inching mode and interlock mode.

1. In self-locking mode, users can turn on/off the 4 connected devices independently. For example, if users turn on CH1, connected device keeps on. If users turn off CH2, connected device keeps off.

2. In inching mode, users can turn on the connected devices for 0.25-4s(Sonoff 4CH Pro) or 1-16s (Sonoff 4CH Pro R2). For example, users can turn on CH1 connected device for 1s, then auto-off.

3. In interlock mode, users can turn on 1 device every time, and turn off other devices at the same time. For example, if users have turned on CH2, then when they turn on CH3, CH2 will be auto-turned off at the same time.

We will introduce how to switch among the 3 modes below:

CAUTION: Please cut off power supply before switching S5, S6, K5, K6. Whether you use DC or AC input, make sure you have unplugged the power plug every time!!!

S6 is interlock /inching&self-locking switch: Toggle to the right(0), it enters into interlock mode; Toggle to the left(1), it enters into inching &self-locking mode.

K5 is inching/self-locking switches: From left to right, there are 1, 2, 3, 4, correspondingly for channel 1 (CH1), channel 2 (CH2), channel 3 (CH3), channel 4 (CH4). Toggle the switch down (0), the corresponding channel enters into inching mode; Toggle the switch up (1), the corresponding channel enters into self-lockin mode.

Please note that if S6 is toggled to the right(0), your 4CH Pro is in interlock mode, it's invalid to set K5.

K6 is used to set the delay time for inching mode. From left to right there are 1, 2, 3, 4, correspondingly for CH1, CH2, CH3, CH4. Take Sonoff 4CH Pro for example, toggle all switches down (0000), the inching time will delay for 4s; Toggle all switches up (1111), the inching time will delay for 0.25s.

Please refer to the delay time setting list of Sonoff 4CH Pro below:

Please refer to the delay time setting list of Sonoff 4CH Pro R2 below:

S5 is 433MHz code clearing button: To clear the 433MHz coding, please press and hold it until the 4 LEDs lit up green and off.

Pair with 433MHz RF Remote: Quickly press twice one of the switches below, then press one of the ABCD buttons on your RF Remote. If paired successfully, the button will lit up in red, and the corresponding status LED will blink in green for 4 times. You can press the button to turn on or turn off the related channel.