1. Write bootloader befor make board (http://ru.aliexpress.com/item/QFP32-TQFP32-FQFP32-To-DIP32-SA636-IC-Programmer-Adapter-Clamshell-Test-Socket/32577712983.html?spm=2114.03020208.3.18.RSlfjm&ws_ab_test=searchweb201556_0,searchweb201602_4_301_10034_507_10032_508_10020_10017_10005_10006_10021_10022_401_10007_10018_10019,searchweb201603_7&btsid=4a2ef3a2-d78a-426f-9897-64f92da32ff4)

2. Write bootloader befor set NRF24 on NRF pinout

Dang, yeah that is certainly small!

I was wondering same as above. Perhaps he solders some leads on temporarily to program. The price to pay for miniaturization? LOL

Hi, great project !

Can you detail how you burn the bootloader and the sketch into the atmega ? (I mean, how do you wire the pinout to upload bootloader and sketch)
Thanks !!

Looks nice! Thanks for the clarification

Changes: Fix license info

.lay files is a "Sprint-Layout" http://www.abacom-online.de/uk/html/sprint-layout.html

Hi,
I see you use CERN OHL but I do not find the required files in the repo.
Where do you store those?
According to the CERN OHL 1.2 howto, you need to provide the following documentation with your project:
LICENSE.PDF
cern_ohl_v_1_2_howto.pdf
PRODUCT.TXT
CHANGES.TXT

Please check the howto closely for how to use the license, or pick another license.
I also do not recognize the tool you have used. How do I use .lay files?