S110 in SDK 8.x to where?

[Jordan Archer]

I need to upgrade and existing nrf51 S110 system based on SDK 8.x to something that supports the same functionality and also supports both a nrf51 (during the transition) and an nrf52 for the near term future product.

My question consists of the following:

1. What SDK version to use?  (I'm assuming the current 14.x)

2. What softdevice target?  S???

3. Can a single source tree support both the nrf51 and nrf52?  (with compiler flags for some of the architecture differences).

[Kenneth]

Hello,

You can choose between SDKv11 (first releases that support nRF52-series) or SDKv12.3 (last release supporting nRF51-series):

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/compatibility_matrix/nRF51422_nRF51822_ic_rev_sdk_sd_comp_matrix.html?cp=3_0_4 

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/compatibility_matrix/ic_rev_sdk_sd_comp_matrix.html?cp=2_1_3_2 

There were quite a lot of changes going from SDKv11->SDKv12.x. You will likely be most familiar with SDKv11, since you are already working with SDKv8.x.

My recommendation is that if you have code size conserns, then you should use SDKv11 (typically the modules use less code space), while if you want to take advantage of all the new peripheral features in nRF52-series, then you should build you application using SDKv12.3. Also using SDKv12.3 will make it easier to later move to more recent SDK, such as SDKv14.x and beyond if you only plan to support only the nRF52-series.

[Jordan Archer]

Also, thanks for the info.  That helps quite a bit in planning.