Added license and legal information given complaints by DL2MAN regarding what seems to be a monopoly he imposes on all things USDX and (tr)USDX. I will publish his formal response if he wishes.

README.md

@@ -15,6 +15,16 @@ Enjoy using this firmware, constructive criticism always welcome!
 
 Use of this firmware is at the user's own risk. No warranty is provided although effort will be given where available to help all users.
 
+Legal basis for the distribution of modified open source firware based on the original license conditions:
+1. Constitutional right of artistic expression. 2. Consumer law rights to distribute self-modified products, hardware and own or open-source modified software, and share that information openly.
+Original license terms:-
+"// QCX-SSB.ino - https://github.com/threeme3/QCX-SSB
+// Copyright 2019, 2020, 2021 Guido PE1NNZ <pe1nnz@amsat.org>
+// 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.
+"
 Reproduced from the original project:-
 
 uSDX is a simple and experimental (Class-E driven) SSB and CW SDR transceiver. It can be used to make QRP SSB contacts, or (in combination with a PC) used for the digital modes such as FT8, JS8, FT4. It can be fully-continuous tuned through bands 80m-10m in the LSB/USB-modes with a 2400Hz bandwidth has up to 5W PEP SSB output and features a software-based full Break-In VOX for fast RX/TX switching in voice and digital operations.