Pair two NRF52832 devices with my android smartphone

RE: Pair two NRF52832 devices with my android smartphone

Hung Bui — Thu, 27 Sep 2018 08:34:42 GMT

Hi Facundo,

Are you saying your 15 pressure sensors also taking samples every 5-10 minutes ? What data are you sending 15 times in a second ? How big is your data ?

In your case, I would think it's best to optimize your insole battery. I assume you have pretty small battery on the insole ? By having one of your insole acts as both central and peripheral you may lose more current for the central role on this insole.

I don't think it would be a problem having your phone to connect to both insoles. You can design your app to connect automatically with the 2 insoles, transparent to the end customer to make it simple.

RE: Pair two NRF52832 devices with my android smartphone

FacundoNoya — Wed, 26 Sep 2018 16:29:57 GMT

Hi Hung! Thanks for your quickly answer!

I will try to explain better my problem,

I have two footwear insoles that has 15 pressure sensors, 1 for temperature and 1 for humidy in each insole. They have to control the foot ambient all day but it will take samples every 5 or 10 minutes. The rest of the time is expected to be in sleep mode.

Al this information is sent in one data package and we are sending 15 of this for second.

About the phone, we want to make it the most easy way for any kind of phone who can use this kind of technology.

Which mode do you recommend to start? and which one is less current consumption?

Thanks in advance for your time!!

Regards,

Facundo

RE: Pair two NRF52832 devices with my android smartphone

Hung Bui — Wed, 26 Sep 2018 12:19:05 GMT

Hi Facundo,

We would need some more information about your communication to be able to give you advice. We would need to see if you are hitting any limit here.

How much data do you collect every second ? What is the real time requirement you have ? What kind of connection interval you are expecting? Do you see any limitation on the phone that it couldn't handle the 2 connections ? Is it ok to have 2 connections on the phone or it's preferred to have only one connection ?

Connecting both sensors to the phone make the firmware more simple but may cause higher current consumption. By combining the data of the two sensor you can send them more effectively. The example of "connecting device A to device B and device B to P " already provided in our SDK, it's the relay example:

C:\NordicSDK\SDKv15.1\examples\ble_central_and_peripheral\experimental\ble_app_hrs_rscs_relay