updated readme

README.md

@@ -1,2 +1,28 @@
 # COLLECTION-model4823
-Collection of build environment for Model 4823 (Indoor Environmental Sensor- Catena 4618m201)
+
+Source and required libraries for the MCCI® Model 4823 Indoor Environment Sensor.
+
+This repo is mostly submodules; clone it using `git clone --recursive`.
+
+The script [`build-with-cli.sh`](build-with-cli.sh) can be used to build the `catena4618m201_simple` sketch using the [`arduino-cli`](https://github.com/arduino/arduino-cli).
+
+---
+
+## Meta
+
+### Trademarks and copyright
+
+MCCI and MCCI Catena are registered trademarks of MCCI Corporation. LoRa is a registered trademark of Semtech Corporation. LoRaWAN is a registered trademark of the LoRa Alliance.
+
+This document and the contents of this repository are copyright 2021, MCCI Corporation.
+
+### License
+
+This repository is released under the [MIT](./LICENSE) license. Commercial licenses are also available from MCCI Corporation.
+
+### Support Open Source Hardware and Software
+
+MCCI invests time and resources providing this open source code, please support MCCI and open-source hardware by purchasing products from MCCI, Adafruit and other open-source hardware/software vendors!
+
+For information about MCCI's products, please visit [store.mcci.com](https://store.mcci.com/).
+