{"product_id":"pzem-004t-ac-energy-monitor-module-100a-modbus-rtu","title":"PZEM-004T AC Energy Monitor Module 100A MODBUS-RTU","description":"\u003ch1\u003ePZEM-004T AC Energy Monitoring Module – 100A Current, MODBUS-RTU\u003c\/h1\u003e\n\u003cp\u003eThe PZEM-004T is a compact AC energy monitoring module designed for real-time measurement of electrical parameters in single-phase systems. It captures voltage, current, active power, frequency, power factor, and cumulative energy consumption with high accuracy. Engineers and makers use it to build IoT energy loggers, smart plugs, and home automation dashboards that require precise power analytics.\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e80 – 260 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e0 – 100 A (via external CT)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Parameters\u003c\/td\u003e\n\u003ctd\u003eVoltage, current, active power, frequency, power factor, energy (kWh)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eTTL MODBUS-RTU (9600 bps default)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy Class\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e45 – 65 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-energy-monitor-dashboard-kit-iot-power-meter-with-live-web-charts\"\u003eReal-time home energy monitor with Wi-Fi logging to a cloud dashboard using ESP32\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart plug that tracks appliance power consumption and sends alerts when usage exceeds limits\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-voltage-and-current-monitor\"\u003eSolar inverter output monitor to measure voltage, current, and power factor on the AC side\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIndustrial energy audit tool with data export to CSV for spreadsheet analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module uses TTL-level MODBUS-RTU (5V logic) and interfaces directly with Arduino Uno, Mega, Nano, as well as ESP8266, ESP32, and Raspberry Pi (with a USB-to-TTL converter). It requires a stable 5V DC supply for the logic and separate AC connections through the included split-core current transformer. Works seamlessly with libraries like PZEM004Tv30 for Arduino.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to common ground, and TX\/RX to microcontroller serial pins (cross-connect). If using 3.3V boards like ESP8266, add a level shifter or voltage divider on the TX line to avoid damage. The CT clamp should be snapped around the live wire only – never around neutral or both wires.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes. Connect the module's 5V, GND, TX, and RX to the Arduino's 5V, GND, RX, and TX pins respectively. Use SoftwareSerial library for communication, as the module uses MODBUS-RTU at 9600 bps.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it measure DC voltage or current?\u003c\/summary\u003e\u003cp\u003eNo. The PZEM-004T is designed exclusively for AC circuits (single-phase, 50\/60 Hz). It cannot measure DC parameters; use a dedicated DC sensor for those applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I read data with ESP32?\u003c\/summary\u003e\u003cp\u003eSince ESP32 operates at 3.3V, you must level-shift the PZEM's 5V TX line to 3.3V (a simple voltage divider with 1kΩ and 2kΩ resistors works). Use the PZEM004Tv30 library with HardwareSerial on pins 16 (RX) and 17 (TX).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445077369197,"sku":"CDN-0923","price":1180.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_1a9180c6-4f9a-41c4-9662-88d1cfbfd40f.jpg?v=1781513169","url":"https:\/\/compoden.com\/products\/pzem-004t-ac-energy-monitor-module-100a-modbus-rtu","provider":"Compoden","version":"1.0","type":"link"}