readme changes

Author: bkbartk

README.md

@@ -1,6 +1,14 @@
 # RF-Bridge-EFM8BB1
 RF-Bridge-EFM8BB1
 
+This project is based on the portisch firmWare: https://github.com/Portisch/RF-Bridge-EFM8BB1
+But the code I copied from halfbackery: https://github.com/Portisch/RF-Bridge-EFM8BB1/commit/97155e1cf77c4687c53d4e3c6dedac1821e8f8bd
+Then I included this fix: https://github.com/Portisch/RF-Bridge-EFM8BB1/commit/b741c75ba324a05ad46321789e7a821faf504850#diff-bfc6bf992497244b49a26db2f8a2fa8beeb3379406a1e7ac3f5285b854d2778d
+And Added some other fix to make my byron doorbell alsways work.
+
+# RF-Bridge-EFM8BB1
+RF-Bridge-EFM8BB1
+
 The Sonoff RF Bridge is only supporting one protocol with 24 bits.<br/>
 The Idea is to write a alternative firmware for the onboard EFM8BB1 chip.