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cyberpower

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ESP32-S3 CyberPower UPS Monitor via USB HID · Native ESPHome component · Reads voltage, load, battery, runtime, status · No NUT/MQTT needed · Direct Home Assistant integration · Shutdown automation ready

  • Updated Sep 16, 2026
  • C++

Go library and CLI for monitoring CyberPower UPS devices with RMCARD 205/305 network cards via SNMP. Features 80%+ test coverage, Prometheus metrics export, device discovery, and production-ready error handling. Library-first design with comprehensive examples.

  • Updated Jan 10, 2026
  • Go

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