SAADC Service Characteristic

[Simon]

Not sure if there is already a worked-out example of converting analog to digital data from AIN0 and then updating a characteristic with that data.

I've worked through the available examples progressively: characteristic tutorial, gpio through characteristic, and then separately the saadc example found in SDK 13.1 using nrf52832 DK on Segger.

I found this devzone question where saadc updates a characteristic, but its not in the tutorial format and does not build on progressively to previous examples.

Currently, I'm looking for some help on how to incorporate and call the saadc functions found in the saadc example,

• saadc_sampling_event_init();
• saadc_sampling_event_enable();
• saadc_init();
• saadc_callback();

from within the nrf5-ble-tutorial-characteristic, and if (or how) time_timeout_handler() is used when samples are added to the buffer.

-thank-you.

[Jørgen Holmefjord]

I'm not aware of any such example or tutorial. The ble_app_proximity example in the SDK use the SAADC to update the BAS charactertistics, but this might not be what you are looking for? The updating of the characteristics should not be different for values from SAADC than from other peripherals or sensors.

[Simon]

The proximity example shows how the battery adc is handled within the main.c, but the tutorial seems to take it one step further and would process (for example) the saadc_event_handler adc_result in the characteristic_update in the our_service.c. Come to think of it, it would be helpful to see how the battery adc and sensor adc could coexist in an updated tutorial (a continuation of tutorials/17/).

[Simon]

Then will there be an additional tutorial in continuation of the existing BLE tutorials on how to add an ADC Characteristic and a Battery Characteristic?

Tutorials

Bluetooth low energy Advertising, a beginner's tutorial

Bluetooth low energy Services, a beginner's tutorial

Bluetooth low energy Characteristics, a beginner's tutorial

Bluetooth low energy central tutorial

(new) Bluetooth low energy Battery Characteristic, a beginner's tutorial

(new) Bluetooth low energy ADC Characteristic, a beginner's tutorial

I hope so as I'm still a beginner on how to work with Services and Characteristics.

-thank-you

[Jørgen Holmefjord]

I cannot promise any new tutorials right away, but I will forwards your suggestions to the person responsible for this. These tutorials is meant to be general, and you should be able to to extend the knowledge from Characteristics tutorial to create ADC/Battery characteristics.

[Simon]

Thank-you, this would be very much appreciated. (I have not seen an example as a hint within questions as to how to link adc to service/characteristic).