Add OctoPrint-PlotlyGraph-LYWSD03MMC plugin entry (#1)

* Add OctoPrint-PlotlyGraph-LYWSD03MMC plugin entry

Author: Copilot

_plugins/plotly_graph_lywsd03mmc.md

@@ -0,0 +1,52 @@
+---
+layout: plugin
+
+id: plotly_graph_lywsd03mmc
+title: OctoPrint-PlotlyGraph-LYWSD03MMC
+description: Plugin to add LYWSD03MMC temperature and humidity sensor data to PlotlyTempGraph
+author: yutaka551
+license: MIT
+
+date: 2026-02-22
+
+homepage: https://github.com/yutaka551/lywsd03mmc-plotly-graph
+source: https://github.com/yutaka551/lywsd03mmc-plotly-graph
+archive: https://github.com/yutaka551/lywsd03mmc-plotly-graph/archive/master.zip
+
+follow_dependency_links: false
+
+tags:
+- temperature
+- humidity
+- bluetooth
+- sensor
+- plotly
+
+compatibility:
+  octoprint:
+  - 1.3.6
+  python: ">=3,<4"
+
+---
+
+# OctoPrint-PlotlyGraph-LYWSD03MMC
+
+OctoPrint plugin to add [LYWSD03MMC](https://www.aliexpress.com/item/4000351449649.html) (Xiaomi Mijia) Bluetooth temperature and humidity sensor data to [PlotlyTempGraph](https://github.com/jneilliii/OctoPrint-PlotlyTempGraph).
+
+## Requirements
+
+- [PlotlyTempGraph plugin](https://github.com/jneilliii/OctoPrint-PlotlyTempGraph)
+- LYWSD03MMC Bluetooth temperature and humidity sensor
+- Bluetooth support on your OctoPrint host (e.g., Raspberry Pi with built-in Bluetooth)
+
+## Features
+
+- Read temperature and humidity from LYWSD03MMC Bluetooth sensors
+- Display sensor data in OctoPrint's temperature graph
+- Configurable update interval
+- Optional display of humidity and battery level
+- Customizable graph labels
+
+## Get Help
+
+If you experience issues with this plugin or need assistance please use the issue tracker at the plugin's Homepage linked on the right.