diff --git a/embedded-workshop-book/src/bsc-exercise.md b/embedded-workshop-book/src/bsc-exercise.md
index cb603da..6aa4dbe 100644
--- a/embedded-workshop-book/src/bsc-exercise.md
+++ b/embedded-workshop-book/src/bsc-exercise.md
@@ -1,16 +1,19 @@
 # BSC Exercise
 
 In this exercise you will learn how to write a board support crate. 
-
+The bsc template will already contain the led and timer implementation. 
+The radio and USB/Power implementations will be deleted, because that just takes up unnecessary space and adds to confusion. 
 
 
 ## Learning goals
 * implement buttons functionality 
+* uarte implementation
 * impl blocks, associated functions, methods
 * generate docs!
 
 
 ## Steps
+### Write a button implementation
 * add field in the board struct
 * add struct for all buttons
 * add struct for the single button
@@ -21,6 +24,14 @@ In this exercise you will learn how to write a board support crate.
 * add doc lines every where!
 * add methods in impl block:
   * detect button push
-  * add another... look at knurling book for inspiration
+  * debounce button function? like in knurling session, requires implementation of a second timer, just for this?
 
+### Write Uarte implementation
+* add field to the board struct
+* add struct for the instance, how to figure out what the type of the inner field is
+* create instance in init, add baudrate, parity etc. 
+* add to instantiation of board struct
+* impl fmt::Write for the Uarte struct, simple write does not work because of dma 
+* example code with button is not a good idea for the simple button implementation.
 
+I think this is plenty for an hour. 
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