EU Smart Power Monitor (No Relay Version)
Tasmota Firmware · Energy Monitoring Only · ESP8285 + HLW8032
This smart plug is engineered for always-on devices such as NAS, servers, routers, gateways, smart hubs, and network equipment.
To guarantee uninterrupted operation, it includes NO relay, ensuring zero chance of accidental shutdown or disconnection.Powered by ESP8285 Wi-Fi and the HLW8032 energy metering chip, it delivers real-time monitoring of voltage, current, power, and energy usage.
The device comes pre-flashed with Tasmota, ready for MQTT-based automation and Home Assistant integration.
🧠 Built for Always-On Devices
Ideal for:
NAS / Home Server
Router / Network Switch
Smart Home Gateway / Hub
Mini PC / Thin Client
Raspberry Pi / Edge AI Device
UPS & Power Monitoring Systems
👉 No relay = no risk of turning off your device accidentally.
Designed for 24/7 continuous monitoring and power analytics.
🔍 Key Features
🛑 No Relay – 100% uninterrupted power
⚡ HLW8032 energy monitoring (high accuracy)
📶 ESP8285 Wi-Fi MCU
🔌 EU Plug (Type C / Type F)
🔄 Tasmota pre-flashed – MQTT & REST API ready
📈 Real-time power consumption tracking
📤 Supports MQTT, HTTP, Web UI, OTA
💻 Fully local – no cloud dependency
🧪 Ideal for automation, power logging, and data collection
📦 Technical Specifications
| Parameter | Description |
|---|---|
| MCU | ESP8285 (2MB Flash) |
| Energy Meter | HLW8032 |
| Relay | None – for guaranteed uptime |
| Firmware | Pre-flashed Tasmota |
| Voltage | 100～240V AC |
| Plug Type | EU Type C / F |
| Protocols | MQTT / HTTP / Web UI |
| OTA Updates | Supported |
| Current | 16A |
The measurement error of active power about 0.2%
The measurement error of effective current is 0.5%
The measurement error of effective voltage is 0.5%
🧠 Automation Use Cases
✔ Detect if a server or router is offline
✔ Monitor energy efficiency over time
✔ Alert if a NAS stops drawing power
✔ Log consumption for IT equipment
✔ Trigger smart automations based on power usage
✔ Ideal for lab testing & data collection
🧾 Why Choose This Version?
Designed for critical devices that must stay powered
Silent & safe — no relay, no downtime risk
Tasmota firmware for full local control & MQTT
Excellent for IT rooms, smart labs, and automation systems
Works 24/7 without interruption
Template:
{"NAME":"Athom Plug V2","GPIO":[0,0,0,3104,0,32,0,0,0,576,0,0,0,0],"FLAG":0,"BASE":18}
GPIOs:
GPIO3： CSE7766 Rx
GPIO5： Button1
GPIO13 ：LedLinki
Notice:
HLW8032 occasionally report invalid power measurements for load values below 5W. During this situation it sometimes reports a valid load. By setting SetOption39 to 128 (default) it must read at least 128 invalid power readings before reporting there is no load.
To discard all loads below 6W simply set SetOption39 1 (0 will reset to default on next restart) so it will report no load below 6W.