S40TPB Reset & Teardown (FCC ID 2APN5S40TPB)

Factory reset and internal photos for Sonoff (Itead) S40TPB. Sonoff smart plug.

January 16, 2026 • 1 min read

Before you buy the Sonoff (Itead) S40TPB, check what's inside.

The Sonoff S40TPB is a WiFi-enabled smart plug that allows remote control of appliances via the eWeLink app. It's designed to integrate seamlessly into the Sonoff ecosystem for convenient smart home automation.

⚠️ NOTE: This device connects to mains voltage (110-240V). Always disconnect power before disassembly or maintenance.

Quick Specs

Manufacturer: Sonoff (Itead)
Model: S40TPB
Protocol: WiFi
Chipset: ESP/CK Chip
Ecosystem: Sonoff
App: eWeLink

🔧 Geek Corner (Flashing Info)

Chipset: ESP8285
Flashable: ✅ Yes
Info: Uses ESP8285 chipset, commonly flashable with Tasmota or ESPHome.

User Manual

Scanned pages from the official user manual:

S40TPB Manual

External Photos

Photos of the device exterior:

S40TPB Exterior

Internal Photos

Teardown photos showing the PCB and components:

S40TPB PCB

Verdict

The S40TPB is a WiFi device from the Sonoff ecosystem.