- Updated README file

README.md

@@ -3,10 +3,47 @@ Mechanical keyboard based on HHKB layout
 
 ## About
 
+Just another fun(?) keyboard with HHKB layout. Designed to fit in some 60% Poker cases.
+
+Can accept normal caps lock or stepped. No Backlight or RGB leds.
+
+All caps are in standard size to increase choice of keysets!
+
 ![Layout](./layout.png "Layout")
 
 ![PCB](./Kicad/MX_HHKB.png "PCB")
 
+## Firmware
+All firmware we can drive an ATMEGA32U4 (QMK, TMK and other forks)
+
+### Used PINs
+* Col0: B0
+* Col1: B3
+* Col2: B2
+* Col3: B1
+* Col4: D5
+* Col5: D4
+* Col6: B6
+* Col7: B7
+* Col8: C7
+* Col9: D3
+* Col10: D0
+* Col11: D1
+* Col12: D2
+* Row0: C6
+* Row1: B4
+* Row2: B5
+* Row3: D6
+
+### Unused PIN:
+* E6
+* F0
+* F1
+* F4
+* F5
+* F6
+* F7
+
 ## Third party
 Libraries and Footprint are provided by Hasu and /u/techieee.