How to Connect an EM540 Energy Meter to VenusOS Cerbo GX with W5500
Custom W5500-based Modbus TCP client enables EM540 energy meter integration with Victron Cerbo GX and VenusOS.
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Components
Hardware components
WIZnet - W5500
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Project description
Step 1: Understanding the System This project integrates a Carlo Gavazzi EM540 three-phase energy meter with Victron's Cerbo GX running VenusOS. The architecture consists of: EM540 energy meter Microcontroller-based gateway WIZnet W5500 Ethernet controller Modbus TCP communication Victron Cerbo GX VenusOS monitoring environment The goal is to expose power measurements from the EM540 to the Victron ecosystem without requiring additional proprietary hardware. The W5500 provides: Hardwired TCP/IP stack Integrated MAC + PHY 8 hardware sockets 32 KB internal buffer SPI interface up to 80 MHz This…
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