T54C Reset & Teardown (FCC ID 2APN5-T54C)

Before you buy the Sonoff (Itead) T54C, check what's inside.

The SONOFF T54C is a smart touch wall switch that replaces traditional light switches. It connects to your home Wi-Fi network and can be controlled remotely via the eWeLink app, offering features like smart scenes and timers.

⚠️ NOTE: Disconnect Mains. Please install and maintain the device by a professional electrician.

Quick Specs

Manufacturer: Sonoff (Itead)
Model: T54C
Protocol: WiFi
Chipset: ESP/CK Chip
Ecosystem: Sonoff
App: eWeLink

🔧 Geek Corner (Flashing Info)

Chipset: ESP8266
Flashable: ✅ Yes
Info: This device uses an ESP8266 chip, which is commonly flashable with custom firmware like Tasmota or ESPHome.

User Manual

Scanned pages from the official user manual:

T54C Manual

External Photos

Photos of the device exterior:

T54C Exterior

Internal Photos

Teardown photos showing the PCB and components:

T54C PCB

Verdict

The T54C is a WiFi device from the Sonoff ecosystem.

📄 Click to view full text manual (SEO)

User manual V1.1
Smart Touch Wall Switch
·中 文 ----------1 - 9 · English ----------10 - 18 · Warning ----------19 -22
L Out4
L Out3 L Out2 L Out1 L In
N
1

2
1. 横装
2. 竖装
3

1. 断电
4
T5-2C-120), 16A （T5-3C-120)的微型断路器 (MCB) 或漏电断路器 (RCBO)
2. 接线
5
L Out2
L Out1
100-240V AC 
N
L In
100-240V AC 
L In
2C
L Out1
N
1C
6
L Out3
L Out2
L Out1
N
3C
100-240V AC 
L In
4C
L Out3
L Out4
L Out4
L Out3 L Out2 L Out1 L In
N
L Out2
L Out1 N
100-240V AC 
L In
请前往应用商店、 Google Play Store或Apple App Store 搜索"易微联"进行下载。
2. 上电
7

8

9
Wi-Fi
IEEE 802.11b/g/n 2.4GHz
-10℃ ~ 40℃
5% ~ 95%RH， 无冷凝
PC +CRS
T5-1C-120/T5-2C-120/T5-3C-120/T5-4C-120
1C:100-240V ~ 50/60Hz Max 5A
2C:100-240V ~ 50/60Hz Max 10A
3C:100-240V ~ 50/60Hz Max 15A
4C:100-240V ~ 50/60Hz Max 16A
1C:100-240V ~ 50/60Hz Max 5A
2C:100-240V ~ 50/60Hz Max 5A/Gang 10A/Total
3C:100-240V ~ 50/60Hz Max 5A/Gang 15A/Total
4C:100-240V ~ 50/60Hz Max 4A/Gang 16A/Total
1C: 150W Max@240V,75W Max@100V
2C: 150W Max@240V/Gang,75W Max@100V/Gang
3C: 150W Max@240V/Gang,75W Max@100V/Gang
4C: 150W Max@240V/Gang,75W Max@100V/Gang
LED负载
120x74x39mm
L Out4
L Out3 L Out2 L Out1 L In
N
English
10
Product introduction
The device weight is less than 1kg, and the recommended installation height is less 
than 2m. 
Switch panel
Ambient light
Switches LED indicator
Network LED indicator
Wiring ports
Touch control screen

English
11
LED Indicator status and instruction
LED indicators Instructions
Pairing LED 
indicator Device is in pairing mode
Device is not connected to router
Network LED 
indicator
LED indicator status
In the "Cycle mode"
Flashes blue quickly once
Device is connected to the router 
but not to the cloudFlashes blue quickly twice
Operation instruction
Operations Functions
Quick click Turn on/oﬀ the switches and trigger
the smart scenes
Make the device enter the pairing 
modeLong press
Swipe
Multi-point 
click
Instructions
Click the switch panel quickly
Long press the switch panel 
for 5s
Trigger the smart scene
Turn on/oﬀ the ambient light 
manually
Multiple ﬁngers click the switch 
panel
Swipe on the switch panel and 
ensure the swipe distance exceeds 
50% of it
 • T5-120 supports left/right swipe
• T5-120 supports up/down swipe
Quick click Long press
Quick click Long press
English
12
Swipe Multi-point click
Swipe Multi-point click
1. Horizontal installation
2. Vertical installation

English
Installation
1. Power oﬀ
Please install and maintain the device by a professional electrician. To avoid electric 
shock hazard, do not operate any connection or contact the terminal connector while 
the device is powered on!
13
Features
SONOFF TX Ultimate is a smart touch wall switch with LED lights which will produce sound, 
light and vibration eﬀects when it is turned on/oﬀ. After adding in the eWeLink App, you can 
remote control on/oﬀ, switch the ambient lighting modes, set timer and smart scene on the 
phone.
Smart SceneVoice ControlRemote Comtrol
Touch Vibration Light EﬀectsAmbient Lighting Mode
To ensure the safety of your electrical install...