Add support for Deebot N20 Combo (eup9ax)

[Johan854]

🧹 Device information

• Device name: DEEBOT N20 COMBO
• Device class: eup9ax
• Model: N20_COMBO_INT
• Country: FR
• UILogicId: y2combo_ww_h_y2h5

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❌ Problem

The device is detected but not supported:
Device class "eup9ax" not recognized

Result:

• devices_.mqtt = []
• device appears in not_supported
• commands cannot be executed

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🔧 Working workaround (tested and confirmed)

I managed to make the device fully working by cloning an existing hardware file.

Steps:

1. Go to: site-packages/deebot_client/hardware

2. Copy an existing hardware file: gwtll7.py → eup9ax.py

3. Restart the script

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✅ Result after workaround

• Device is correctly detected ✅
• MQTT configuration is populated ✅
• Device no longer appears in not_supported ✅

Example:

Capabilities found for eup9ax
Devices(mqtt=[DeviceInfo(...)], xmpp=[], not_supported=[])

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✅ Working features (fully tested)

After applying the workaround, the following features work correctly:

• ✅ Clean command (start cleaning)
• ✅ Battery status
• ✅ Position updates
• ✅ Stats (area, time)
• ✅ Charge / dock state
• ✅ Network info
• ✅ Device state (cleaning, docked)

Commands return success:

cmdName: clean → code: 0 (OK)

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⚠️ Known limitations

• MQTT unstable on Windows (aiomqtt limitation)
• Requires:

asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

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💡 Proposed solution (simple)

The device appears fully compatible with an existing model.

👉 Suggested fix:

• Add eup9ax as an alias of gwtll7
• OR clone gwtll7.py into eup9ax.py

This alone is sufficient to make the device fully functional.

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🤝 Why this should work

• Same command set works without modification
• Same JSON protocol
• No additional capability adjustments required
• Hardware behavior matches existing supported model

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🙏 Additional notes

• Happy to provide full logs if needed
• Happy to test a patch or PR
• Device is stable once recognized

Thanks for the project 👍