Create README for laird-rs1xx-ext-temp-rtd-sensor

Author: seniorbeto

laird-rs1xx-ext-temp-rtd-sensor/README.md

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+# Sentrius RS1xx Ext Temp RTD Sensor
+
+The Laird Sentrius™ RS1xx Ext Temp RTD has an external temperature sensor probe making it a perfect fit for monitoring low and slow cooking temps mounted inside a smoker. It transmits data over LoRaWAN® and Bluetooth Low Energy (BLE). The robust IP65 sensor enclosure allows it to be used in harsh environments and suitable for food safety management, agricultural environment monitoring, and industrial heating and cooling.
+
+## Features
+
+- External RTD temperature probe for accurate temperature measurements
+- Dual connectivity: LoRaWAN® and Bluetooth Low Energy (BLE)
+- Battery-powered long range sensor platform
+- IP65 rated rugged enclosure for harsh environments
+- Integrated antennas
+- Operating temperature range: -25°C to 50°C
+- Compact dimensions: 116 x 91 x 34 mm
+- Multi-regional frequency support (868MHz, 915MHz, 923MHz)
+
+## Use Cases
+
+- Food safety management and monitoring
+- Low and slow cooking temperature monitoring
+- Agricultural environment monitoring
+- Industrial heating and cooling applications
+- Cold chain logistics
+- HVAC monitoring
+
+## Thinger.io Integration
+
+## Requirements
+
+A LoRaWAN server is required to communicate the Sentrius RS1xx Ext Temp RTD Sensor 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
+
+Laird Connectivity resources can be found at:
+
+- [Documentation](https://www.lairdconnect.com/wireless-modules/lorawan-solutions/sentrius-rs1xx-lora-enabled-sensors)
+- [Thinger docs](https://docs.thinger.io)