Need help for finding the right dev environment

[Binu]

I'm looking to build a product which require an Android board with relay and BLE 5. I am very new to this and so far I have been playing with Raspberry Pi where the BLE and wifi is not that strong. Can you help me on how to move forward on this?

[Nguyen Hoan Hoang]

Not sure what you mean by Android board but nRF5x series are micro-controller.  They are not Android compatible processor.  For firmware development for nRF5x series, I use Eclipse GCC for nRF5x.  It is 100% free unlike other commercial IDEs which limit you to 32KB of compiled code.