4CHPROR3 Reset & Teardown (FCC ID 2APN54CHPROR3)

Before you buy the Sonoff (Itead) 4CHPROR3, check what's inside.

The Sonoff 4CHPROR3 is a 4-gang Wi-Fi smart switch designed for controlling multiple electrical appliances remotely. It supports various control modes including scheduled on/off, voice control, and smart scenes, making it a versatile addition to a smart home setup.

⚠️ NOTE: Ensure mains voltage is disconnected before installation. Verify correct wiring for AC and DC inputs.

Quick Specs

Manufacturer: Sonoff (Itead)
Model: 4CHPROR3
Protocol: WiFi
Chipset: ESP/CK Chip
Ecosystem: Sonoff
App: eWeLink

🔧 Geek Corner (Flashing Info)

Chipset: ESP8285
Flashable: ✅ Yes
Info: Based on FCC ID and common Sonoff models, likely uses an ESP8285 chip which is flashable with custom firmware like Tasmota or ESPHome.

User Manual

Scanned pages from the official user manual:

4CHPROR3 Manual

External Photos

Photos of the device exterior:

4CHPROR3 Exterior

Internal Photos

Teardown photos showing the PCB and components:

4CHPROR3 PCB

Verdict

The 4CHPROR3 is a WiFi device from the Sonoff ecosystem.

📄 Click to view full text manual (SEO)

User manual V1.1 
4-gang Wi-Fi Smart Switch with RF Control 
中文---------------- 1-4 
Deutsch -----------9 -12 
Français ----------17- 20 
English -------------- 5-8 
Español ----------- 13 -16 
Italiano ------------ 21 -24 

SONOFF TECHNOLOGIES CO., LTD. 中 文 
DC输入 
4CHPROR3 
9-23V 
AC输入 100 -240V 50/60Hz 
10A /通道 40A/ 总负载： 
IEEE 802.11 b/g/n 2.4GHz 
Wi -Fi 
(Android 4.1 & iOS 9.0) 或者更高版本 
PC 
145x90x34mm 
1 

SONOFF TECHNOLOGIES CO., LTD. 中 文 
（R1/R2/R3/R4 ） （R1/R2/R3/R4 ） 
DC 输入 
AC 输入 
NO COM 
NC 
2 

SONOFF TECHNOLOGIES CO., LTD. 中 文 
3 

SONOFF TECHNOLOGIES CO., LTD. 中 文 
FAQ Pairing failed... 
4 

SONOFF TECHNOLOGIES CO., LTD. English 
Specifications 
Model 4CHPROR3 
DC Input 
AC Input 
9-23V 
100 -240V 50/60Hz 
10A /gang 40A/Total 
IEEE 802.11 b/g/n 2.4GHz 
Max . Load 
Wi-Fi 
Operating systems (Android 4.1 & iOS 9.0)or hig her 
Material PC 
Dimension 145x90x34mm 
LED indicator status instruction 
LED indicator status Status instruction 
Blue LED ﬂ ashes (one 
long and two short) Quick pairing mode 
Blue LED keeps on Device is connected successfully 
Blue LED flashes quickly 
once Unab le to discover the router 
Blue LED flashes quickly 
twice Connect to the router but fail to connect to Wi-Fi 
Blue LED flashes quickly 
three times Upgrading 
Red LED is on/off Device is on/off 
5 

SONOFF TECHNOLOGIES CO., LTD. English 
Product Introductio n 
（R1/R2/R3/R4 ） 
Pairing button/Manual switch 
（R1/R2/R3/R4 ） 
On/Oﬀ LED indicator(Red) 
Wi-Fi LED indicator(Blue) 
DC input AC input 
Features 
4CHPROR3 is a 4-gang Wi-Fi smart switch with self-locking, interlock 
and inching that allow you to remotely turn on/oﬀ connected devices 
via your smartphone, schedule on or oﬀ, share to your family to 
control together. 
Remote Control Single/Countdown 
Timing 
Voice Control Share Control 
Smart Scene Power -on State Camera Feature 
LAN Control Self -locking Interlock Inching 
6 

SONOFF TECHNOLOGIES CO., LTD. English 
RF Remote Controller Pairing 
Pairing Method: 
Long press the channel switch that you want to pair for 3s until the 
LED “ﬂashes quickly once” and release, then short press the 
remote controller button that your want to pair. The red channel 
switch button LED “ﬂashes quickly once” indicates that the pairing 
is successful. Other remote controller buttons can be paired 
according to this method. 
Clearing Method: 
Long press the channel switch that you want to clear for 5s until 
the LED “ﬂashes quickly twice” and release, then short press the 
remote controller button that your want to clear. The red channel 
switch button LED “ﬂashes quickly once” indicates that the clearing 
is successful. Other remote controller buttons can be cleared 
according to this method. 
7 

SONOFF TECHNOLOGIES CO., LTD. English 
Factory Reset 
Long press the pairing button for about 5s until the Wi -Fi LED 
indicator changes in a cycle of two short and one long ﬂash and 
release, then the rese t is successful. The device enters quick 
pairing mode (Touch). 
Please ...