I am starting my development work with Nordic Semiconductor nRF51822 Device and already purchased the Development kit. What i wanted to ask is do i need to purchase KEIL MDK 500 License to write my code/application? Because the Low energy soft devices themselves takes up space of 64KB -128 KB. Kindly suggest and explain, do i need to purchase SUPER EXPENSIVE license (£3,349.14 = $ 5412) of KEIL MDK500 to compile any application code with BLE soft-devices stack of Nordic Semiconductor? and is there any way around to escape the license cost?