S40ZBTPB Reset & Teardown (FCC ID 2APN5S40ZBTPB)

Factory reset and internal photos for Sonoff (Itead) S40ZBTPB. Sonoff smart plug.

January 16, 2026 • 1 min read

Before you buy the Sonoff (Itead) S40ZBTPB, check what's inside.

The Sonoff S40ZBTPB is a mains-powered smart plug that uses Bluetooth for connectivity and integrates with the Sonoff ecosystem via the eWeLink app. It allows for remote control and automation of connected appliances.

⚠️ NOTE: This device connects to mains voltage (110-240V). Always disconnect power before working on or near the device.

Quick Specs

Manufacturer: Sonoff (Itead)
Model: S40ZBTPB
Protocol: Bluetooth
Chipset: ESP/CK Chip
Ecosystem: Sonoff
App: eWeLink

🔧 Geek Corner (Flashing Info)

Chipset: ESP32 (likely)
Flashable: ❌ No
Info: Typically uses ESP32 variants with locked bootloaders or custom firmware that prevents easy flashing of alternative firmware like Tasmota or ESPHome.