Sonoff Mini R4 Extreme Matter Smart Relay
Smart Electronics
“Sonoff Mini R4 Extreme is a compact ESP32-based smart relay (ESP32 MCU, relay output, external switch input) with Matter support and a 10A mains relay. It excels for behind-switch installations and local flashing (pins exposed, esptool/ESPHome compatible), but has trade-offs: requires careful soldering/programming and is limited to 10A mains loads (safety/deployment implications). Good choice for DIY smart-home integrators wanting Matter and firmware flashing capability.”
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Supports Matter for native pairing with Apple, Google, and Alexa ecosystems
youtube.com (NotEnoughTECH)matter enabled sonoff
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Detachable relay mode and multi-switch compatibility for flexible wiring setups
sonoff.techDetach Relay mode
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Requires disassembly and moderate soldering to access serial pins for flashing
devices.esphome.ioProgramming Firmware programming need disassembly
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Entering bootloader needs holding the onboard button while powering device
devices.esphome.iohold button pressed while enabling power supply