diff --git a/README.md b/README.md
index 1626b78..6f975a7 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,10 @@
-AVR-USART-printf
+AVR USART printf
 ================
 
 AVR library that allows printf to be used and redirected to the USART.
+
+This library has been tested with an atmega328p and atmega128.
+
+To change your hardware/programmer/programming port consult the relevant parts of the Makefile.
+
+To compile and install on your microcontroller use `make` and `make writeflash`