Update README.md

Description of this fork

README.md

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 ![TinyGSM logo](https://cdn.rawgit.com/vshymanskyy/TinyGSM/d18e93dc51fe988a0b175aac647185457ef640b5/extras/logo.svg)
 
+This fork (https://github.com/neilh10/TinyGSM) focuses on reliability and testing for a few modules used in the ModularSensors (https://github.com/neilh10/ModularSensors).    
+These are the cellular Digi LTE CAT-M1, SIM7080, and WiFi Digit S6, ESP32-Wroom - used in https://www.envirodiy.org/      
+The reliability focus is to reduce writes to NVRAM to a one per system boot cycle. The current method is typically a write per IP destination setup. NVRAM often has a limited life.
+
 A small Arduino library for GSM modules, that just works.
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 [![GitHub download](https://img.shields.io/github/downloads/vshymanskyy/TinyGSM/total.svg)](https://github.com/vshymanskyy/TinyGSM/releases/latest)--->