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Image: reddit.com · (ES) Sistema de monitoreo instalación solar Solax Cloud con esp32

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A Solax solar inverter monitor that replaces the Wi-Fi dongle

An ESP32 sniffs a Solax inverter's data to replace its Pocket Wi-Fi dongle, with emails, Firebase uploads and an Android app, made with Claude Pro.

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Credits

  • Reddit poster SignificantGate2384 Source ↗
  • Repository account electroUser-ide Source ↗

Earliest dated source: 30 Aug 2026

Code ↗

The full story

Written in Spanish, this post describes a project made with Claude Pro to replace the Solax Pocket Wi-Fi 2.0 dongle, tested on a Solax X3-5.0-T-D 5kW solar inverter. An ESP32 acts as a sniffer, reading the inverter's hexadecimal data frames and converting them into readings, which the post calls reverse engineering.

The ESP32 sends a daily email at 10pm with the data and uploads readings to Firebase every five seconds, where an Android app shows them. The whole project is in Spanish and shared on GitHub for free.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: (ES) Sistema de monitoreo instalación solar Solax Cloud con esp32Forum threadreddit.com
    Reddit poster: SignificantGate2384Posted 30 Aug 2026

    The maker's post on r/esp32.

    If it disappears: archived copy of Reddit: (ES) Sistema de monitoreo instalación solar Solax Cloud con esp32 (opens in a new tab)

  • The code: github.comCode or repositorygithub.com
    Repository account: electroUser-ide

    Linked in the post.

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