Merge Plugin dingtek_dc520 into Main

dingtek-dc520/CHANGELOG.md

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+# Changelog 
+
+## 1.0.0 - 2026-06-09
+
+- First version of plugin

dingtek-dc520/LICENSE.md

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+Copyright 2026 Thinger.io
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

dingtek-dc520/README.md

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+# DC520 - People Counter
+
+The CNDingtek DC520 is a microwave radar bidirectional people counter designed for indoor use, which calculates the people number for in/out respectively. It supports entrance and exit flow monitoring to help building operators understand occupancy movement and service demand patterns for smart building and public space operations.
+
+## Features
+
+- **Bidirectional Counting**: Distinguishes entrance and exit flow for accurate occupancy movement analysis
+- **Microwave Radar Technology**: Reliable detection for indoor environments
+- **Detection Range**: Up to 3 meters
+- **Target Speed Detection**: Up to 1.5 m/s
+- **Compact Design**: 110 x 109 x 25 mm, 80 grams
+- **LoRaWAN Connectivity**: Real-time data transmission to building platforms
+- **Wide Operating Temperature**: -20°C to +70°C
+- **Low Power Consumption**: 125mA during detection, max 800mA during reporting
+
+## Use Cases
+
+- Smart building occupancy monitoring
+- Conference room and meeting space management
+- Public space crowd control
+- Factory and facility operations
+- Hotel and hospitality venue monitoring
+- Parks and recreational facility management
+- Entrance and exit flow analysis
+
+## Thinger.io Integration
+
+The DC520 integrates with Thinger.io through LoRaWAN connectivity, enabling real-time monitoring and analysis of people counting data for smart building applications.
+
+## Requirements
+
+A LoRaWAN server is required to communicate the CNDingtek DC520 into Thinger.io, some options are:
+
+- [The Things Stack](https://www.thethingsindustries.com/stack/)
+- [LORIOT](https://loriot.io/)
+- [ChirpStack](https://www.chirpstack.io/)
+
+Alongside, the corresponding plugin for the selected LoRaWAN server needs to be installed in your Thinger.io instance.
+
+## Get Started
+
+### Installation
+
+Look for the plugin in the [Thinger.io Plugin Store](https://marketplace.thinger.io/) and install it in your Thinger.io instance. Once the plugin is installed a new Product will be created for this device.
+
+### Configuration
+
+The Product is already preconfigured, check that the auto provision prefix matches the one selected in your LoRaWAN server plugin in Thinger.io, or change it to your desire.
+
+### Usage
+
+Start sending uplinks for autoprovisioning devices and buckets.
+This product also provides a predefined dashboard and downlinks.
+
+## Additional Resources
+
+CNDingtek resources can be found at:
+
+- [Product Page](https://www.dingtek.com/dc520-bi-directional-people-counter)
+- [Device Repository](https://www.thethingsnetwork.org/device-repository/devices/dingtek/dc520)
+- [Thinger docs](https://docs.thinger.io)