diff --git a/bootlib.c b/bootlib.c
--- a/bootlib.c
+++ b/bootlib.c
@@ -1,5 +1,15 @@
 #include "stm32f0xx_hal.h"
 
+/* Notes:
+
+Need to have DFU jump right to the program to unset those option bytes, or somehow have dfu-util unset them. Probably try using the :leave parameter...
+
+       Flashing a binary file to address 0x8004000 of device memory and ask the device to leave DFU mode:
+         $ dfu-util -a 0 -s 0x08004000:leave -D /path/to/image.bin
+
+*/
+
+
 // Unset bootloader option bytes 
 void bootloader_unset(void)
 {
@@ -31,6 +41,8 @@ void bootloader_enter(void) {
    
     HAL_FLASHEx_OBGetConfig(&OBParam);
   
+
+    // FIXME TODO: CHECK THESE OPTION BYTES, he was using an F1 processor. What about the switch flag?
     OBParam.OptionType = OPTIONBYTE_USER;
     /*Reset NBOOT0 and BOOT_SEL,  see: RM 2.5 Boot configuration*/
     OBParam.USERConfig = 0x77; //Sorry for magic number :)