Bluetooth low energy wouldn't work on the NRF91 even when switched to NRF52 and flashed with the appropriate firmware

[Purnjay]

[Purnjay]

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf52840_dk%2FUG%2Fdk%2Fintro.html
These ones

[Øyvind]

This makes no sense to me. Please clarify what development kit you are working on and what samples you are trying to program. Also, I will need to know what SDK you are working on. Please provide as much details as possible.

You are talking about two complete different development kits which do not overlap, based on different technologies BLE vs LTE. 

Kind regards,
Øyvind

[Purnjay]

I am using an nrf9160 DK which can switch to nrf52, as it has a switch on it for debugging, I am using nrf connect 3.10.0 with BLE 3.0.0 and currently, I am trying to program any samples, I am just trying to get the Bluetooth working.  I am using nrf Connect SDK 1.9.0

[Øyvind]

Thanks for clarifying. I think I understand what you are trying to achieve, however the nRF9160DK is targeting the LTE device nRF9160 and using the nRF52840 as a board controller on the development kit. This causes some buttons, LEDs and GPIOs to be controlled by the board controller and are connected via multiple switches.

That said, it is possible to use the nRF52840 as a BLE device, but please note that this may change behavior of the development kit. Please see the board controller documentation under Developing with nRF9160 DK. 

We do have a blog post on nRF9160 DK: Offloading Bluetooth Low Energy related tasks to nRF52840 SoC.

If you are targeting BLE development, we do recommend using one of our BLE development kits as these are less advanced. Please see our BLE portfolio

Kind regards,
Øyvind