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How to control a servo motor from nrf52832 with angle precision?

I am using the Hackable Kit from Electronut labs and using their Bumpy , black magic probe alternative for programming. I would like to control a servo motor precisely at given angle from a mobile app over bluetooth. I have tried the PWM library and driver examples from the SDK 15 examples.

When i run them independently they work well and good. But when i integrate it with any of the Ble_peripheral example it doesn't work. Either i get a SIGSEGU interrupt error, or, when servo motor runs BLE service is disconnected or vice versa happens as if like they both are sharing same resources. But i made sure by tracing their dependencies that they are not sharing any common TIMER or PPI Channel. Yet the problem persists. However even when the servo motor is working i couldn't control its angle the way i wanted it. 

I would like to know whether PWM is the right way to control a servo motor for precision angles. If it is is there any sample code that i can refer to. But please not the SDK examples as they are not helpful. I am Using SEGGER and GBD for codding and loading code into the hardware as I don't own a J-Link. 

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