Adapt UDP to W5100

README.md

@@ -1,4 +1,9 @@
-# W5500 Driver
+# W5100 Driver
+
+**Fork status**:
+* Work-in-progress fork of the crate [w5500](https://github.com/kellerkindt/w5500) for W5100. The two chips are different versions of the same design, very similar but not fully compatible. The older revision of the Arduino Ethernet Shield uses W5100, hence the need for this fork.
+* What works: receive and send UDP packets.
+* Tested on Arduino Uno with Arduino Ethernet Shield.
 
 This crate is a driver for the WIZnet W5500 chip.  The W5500 chip is a hardwired TCP/IP embedded Ethernet controller
 that enables embedded systems using SPI (Serial Peripheral Interface) to access the LAN. It is one of the
@@ -76,3 +81,15 @@ In no particular order, things to do to improve this driver.
 
 * Add support for TCP server implementations
 * Add support for DHCP
+
+## License
+
+[Support me via LiberaPay](https://liberapay.com/tuxmain/donate)
+
+Based on [w5500](https://github.com/kellerkindt/w5500) licensed under MIT/Apache, see Git history for the list of contributors.
+
+GNU AGPL v3, CopyLeft 2025 Pascal Engélibert [(why copyleft?)](https://txmn.tk/blog/why-copyleft/)
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, version 3 of the License.  
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.  
+You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.