XIAO 2-Channel AC Wi-Fi Energy Meter
Overview
The XIAO 2-Channel Wi-Fi AC Energy Meter is a dual-circuit power monitoring module based on the Seeed Studio XIAO ESP32-C6.
Pre-flashed with ESPHome, it integrates directly with Home Assistant for real-time power tracking and automation.
Designed for accurate, bi-directional metering and compact installations, it is ideal for smart-home energy management and solar monitoring applications.
Key Features
• Dual-channel measurement for two independent AC circuits
• Pre-flashed with ESPHome for instant Home Assistant discovery
• BL0939 calibration-free metering IC (±1 % accuracy)
• Bi-directional power measurement for consumption and generation tracking
• Factory-calibrated for reliable accuracy
• 2.4 GHz Wi-Fi with external antenna for stable connectivity
• Open-source hardware design (3D-printed enclosure files available on Thingiverse)
• Compact form factor for embedded or test-bench use
Specifications
| Item | Details |
|---|---|
| Model | XIAO 2-Channel AC Wi-Fi Energy Meter |
| Controller | Seeed Studio XIAO ESP32-C6 |
| Power Input | 100–240 V AC @ 50/60 Hz |
| Metering IC | BL0939 |
| Measurement Channels | 2 |
| Supported CT Sensors | 0–100 A (non-invasive, 1 : 2000 ratio) |
| Measurement Accuracy | ±1 % |
| Wireless Connectivity | 2.4 GHz Wi-Fi |
| Antenna | External 2.81 dBi rod antenna (SMA) |
| Dielectric Strength | AC 3.5 kV / 1 min @ 50 Hz |
| Dimensions | 58 × 70 × 38 mm |
| Enclosure | 3D-printed, white (open-source design) |
Installation Notes
Connect the meter to the monitored AC circuit and attach the CT sensors (sold separately).
Add the device to Home Assistant via ESPHome for automatic discovery.
For best signal performance, position the external antenna clear of other metal enclosures.