PIR3RF Reset & Teardown (FCC ID 2APN5PIR3RF)

Factory reset and internal photos for Sonoff (Itead) PIR3RF. Sonoff smart plug.

January 16, 2026 • 1 min read

Before you buy the Sonoff (Itead) PIR3RF, check what's inside.

The Sonoff PIR3RF is a Wi-Fi enabled battery-powered motion sensor designed for smart home automation. It integrates with the eWeLink app, allowing for remote monitoring and triggering of other smart devices.

ℹ️ Note: This is a battery-powered device. Remove batteries before opening.

⚠️ NOTE: Ensure correct battery polarity when replacing CR2450 batteries.

Quick Specs

Manufacturer: Sonoff (Itead)
Model: PIR3RF
Protocol: WiFi
Chipset: ESP/CK Chip
Ecosystem: Sonoff
App: eWeLink

🔧 Geek Corner (Flashing Info)

Chipset: ESP8285
Flashable: ❌ No
Info: While it uses an ESP chip (ESP8285), the proprietary firmware and lack of exposed flash pins make it difficult to flash custom firmware like Tasmota without significant hardware modification.