Sonoff MINI PM Matter Over WiFi Power Meter (Non-Switch) vs Zemismart SDM01

IEEE 802.11 b/g/n on 2.4 GHz, from an ESP32-C6

The spec sheet lists Wi-Fi only, while the FCC grant authorises a second 2402-2480 MHz transmitter, so the radio is there but SONOFF never documents it as a feature

The Zigbee version of this meter is a separate model, the MINI-ZB1GP

Zigbee 3.0 on a Tuya ZS3L module, acts as a Zigbee router

Energy data and electricity bills export to a spreadsheet, from the app and from the local console

Up to one year of energy data, and going offline does not interrupt the recording

Custom currency and electricity rate, with the bill broken down in charts

Fixed or time-of-use pricing, with consumption shown per rate band

Indoor flush mounting only, with no rail clip

One 18 mm DIN module

Reached by adding the meter to eWeLink and linking the account, the path SONOFF documents for this model

Alexa has no energy meter device type and this meter has no relay to expose as a switch, so a skill has nothing to publish

The meter is a Matter over Wi-Fi device, but SONOFF's own platform table marks Apple Home as not yet able to add it: the Home app still does not accept the Matter energy meter device type. Nothing on SONOFF's side is missing, so the meter gets in once Apple supports that type.

Reached by adding the meter to eWeLink and linking the account, the path SONOFF documents for this model

Matter over Wi-Fi: the device carries a Matter QR code and is commissioned by scanning it from a Matter app | Home Assistant is the one Matter controller that accepts it today, because the energy meter device type is not yet handled by the other ecosystems

Reached through eWeLink account linking, and SONOFF notes SmartThings also reads the power consumption figures

JSON-RPC 2.0 over HTTP and WebSocket, documented as an open API

The OpenEdge web console runs on the device and needs no app and no account

MQTT is configured from the device itself and is how Home Assistant reads the meter with no cloud in the path

No native MQTT, though Zigbee2MQTT republishes the readings

Inline measurement, no current transformer involved

3 x 120 A split-core current transformers

One circuit, the load wired through its L and L Out terminals

Three phases, or three single-phase circuits

SONOFF documents real-time voltage, current, power and accumulated energy, with no power factor reading

Voltage, current, power, power factor and frequency per phase

Rated 100-240V~ 50/60Hz on a single line, so a 120/240 V split-phase service is out of scope