Skip to content

RF-UPS-Monitor: Mains Power Monitoring with RP2040 and W5500

A Raspberry Pi Pico and W5500 monitor mains presence over SNMP, with loss/restore traps, LibreNMS integration and a PoE carrier design.

Lihan__

Published October 25, 2026 · Updated October 27, 2026 · © MIT license (MIT)

92 UCC

10 WCC

5 VAR

Original author: TheKingOfChaos (GitHub)Original source (new tab)

RF-UPS-Monitor: Mains Power Monitoring with RP2040 and W5500

Components

Hardware components
W5500-EVB-Pico-PoE

WIZnet - W5500-EVB-Pico-PoE

x 1

Supported integrated RP2040 + W5500 PoE board; alternative to a Pico with an external W5500 module.

Project description

RF-UPS-Monitor — Mains Presence Monitoring over W5500 Ethernet Project curation | Original repository: TheKingOfChaos/RF-UPS-Monitor The cover is an AI-generated conceptual illustration. The PCB images below are original design renders; the system diagram simplifies the source architecture. English 01 — Project Overview A network can still be reachable while a particular mains circuit has failed. RF-UPS-Monitor turns that local power-presence signal into something a network management system can poll and receive alerts about. The project combines a Raspberry Pi Pico / RP2040, WIZnet W5500…

Keep reading with a free account

Guests can read 15 projects per visit. Log in or create a free account to read the full description, open the documents and join the comments.

Similar projects you might like