Hello @renerene
Eat this! : https://pcbs.io/user/Wijnand
Aaaand this! : http://alf4all.demon.nl/engineering/topics/targets/Arduino-Pro-Mini_RFM95/index.htm
I/we love this PCB from @Wijnand! We build our Weather.- and TrackerNodes with this PCB.
Have a nice day. 
Nordrunner