Code size on nRF52810 with ble_app_template example

[Nicolas Cv]

Hi all,

I'm starting developping code with SES, on an nRF52810 (192kB of Flash), with the BLE stack S112.

Because my project include BLE and custom UUID, I started with the code example ble_app_template, but this code, compiled, take 147kB of Flash with Optimization level set to "Optimize for Size. For debugging, if I compile without optimization, the code size is 187,8kB (97% of the Flash), for a code controlling a LED, a button and advertising one characteristic.

I know that the BLE stack S112 is taking account in this size evaluation, but it is about 100kB, but I don't understand why a code as light can take near 90kB

So my questions are:

Why this code take so much space ?

Is there any other example I can start with ?

Tank you for your help

[awneil]

The Template is not "light"!

It contains everything you need plus some extras for a full BLE application.

[Nicolas Cv]

Ok, but my problem still remain. I cant start a project with all my flash occupied.

In this example, is there any documentation of what are the basics for a BLE connection, and a description of the extras, in order to know what I can delete to save some space.

[awneil]

I would strongly recommend that you do not start a design on the nRF52810.

It is specifically a cut-down, low-memory part.

Start with an nRF52832 - then, when your project is working, you can think about optimising it down to an nRF52810.

As the old saying goes, "Premature optimisation is a root of all kinds of evils"

[Nicolas Cv]

Finally, I restart the firmware development from the project Ble_App_Blinky.

This example is more "light" (43kB without optimization for size), and suitable for what I want to do. Moreover, in this example, the LBS service is an custom UUID, so I can change easily to mine.

I just regret the fact there is not enough explaination or documentation on Ble_App_Template project, because I can not see what is the difference between this 2 projects on BLE management, and what is missing on Ble_App_Blinky example. 

[run_ar]

I would suggest that you open the two projects and check which ble modules is included in the template project that is not included in the blinky project.