diff --git a/README.md b/README.md
index b8960c6..6a6a1b6 100755
--- a/README.md
+++ b/README.md
@@ -11,6 +11,11 @@ The pynmea2 module is required.
 
 This should work for DMR radios that send location data as a UTF-8 NMEA sentence. I am hopping to add support for more radios in the future.
 
+### Differences in branches
+
+* **GPS**: Contains the GPS/Data Application.
+* **aprs_features**: Contains the GPS/Data Application and a modified version of the APRS implementation for repeaters and hotspots by **IU7IGU**. (See [https://github.com/iu7igu/hblink3-aprs](https://github.com/iu7igu/hblink3-aprs) for his work). I combined these for convenience.
+
 ## Confirmed working:
 Actually tested
 
@@ -30,6 +35,10 @@ A user should configure their radio for the DMR ID of the application and privat
 
 For example, N0CALL has a DMR ID of 1234567. N0CALL's radio sends a position to the application. The application will query the subscriber_ids file for DMR ID 1234567. The result will be N0CALL. An APRS location pack is created and uploaded to APRS-IS.
 
+## Configuration
+
+See hblink_SAMPLE.cfg, rules_SAMPLE.py, and gps_data_SAMPLE.cfg for examples.
+
 
 
 ---