SPMMAIN Reset & Teardown (FCC ID 2APN5SPMMAIN)
Factory reset and internal photos for Sonoff (Itead) SPMMAIN. Sonoff smart plug.
January 16, 2026
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1 min read
Before you buy the Sonoff (Itead) SPMMAIN, check what's inside.
The Sonoff SPMMAIN is a WiFi-enabled smart power meter designed for mains voltage operation within the Sonoff and eWeLink ecosystem. It allows users to monitor and control power consumption for connected appliances.
⚠️ NOTE: Disconnect mains power before performing any work on this device.
Quick Specs
- Manufacturer: Sonoff (Itead)
- Model: SPMMAIN
- Protocol: WiFi
- Chipset: ESP/CK Chip
- Ecosystem: Sonoff
- App: eWeLink
🔧 Geek Corner (Flashing Info)
- Chipset: ESP32
- Flashable: ✅ Yes
- Info: The device uses an ESP32 chipset, which is generally flashable with custom firmware like Tasmota or ESPHome after opening the device and flashing via serial.
User Manual
Scanned pages from the official user manual:
External Photos
Photos of the device exterior:
Internal Photos
Teardown photos showing the PCB and components:
Verdict
The SPMMAIN is a WiFi device from the Sonoff ecosystem.