| Component | Specification | |-------------------|-----------------------------------| | MCU | ESP32 (or ESP8266) | | Relay Module | 1-channel, 10A/250V AC | | Power Sensor | INA219 (I²C, up to 26V DC) or PZEM004T (AC) | | Power Supply | HLK-PM03 (3.3V, or 5V via USB) | | Enclosure | Fire-retardant ABS plastic |

: High-voltage power supplies that create the electrostatic field. Smart Meters & Fusion Terminals