Nano-Pb

[Sunil vignesh]

Hi,

 I am trying to implement protobuf for my application. I have seen that nano-pb library is there in SDK file. I want to use it in BLE-UART communication. How to do with that and is there any example related on it 

I am using nrf52832 SDK17.0.2 SES

[Edvin]

It looks like the protobuf is used by the bootloader (SDK17.0.2\examples\dfu\secure_bootloader\) but not anything other than that, it looks like. It is used to organize the bootloader settings and so on. I see from your case history that you have touched into DFU before, so perhaps you can dig into the bootloader example to figure out how it is used. 

BR,

Edvin

[Sunil vignesh]

Hey Edvin,

Thanks for the quick response. I would like to serialize the data via BLE_UART when I send it as a string, it take much time to transfer. I'm planning to implement the nano-pb to make it faster. Help me get it started.

[Edvin]

Sunil vignesh said:

it take much time to transfer.

 So what is your bottlenect? BLE or UART? And is this before you have added the nano-pb or after?

[Sunil vignesh]

Hi Edvin,

 I didn't use nano-pb before. I have look the DFU as you said but in SDK folder i didn't find any related proto files for DFU dfu.proto like that. and also I found the nano-pb folder in external folder there i have seen the generator folder which have some py files and protoc compiler i thing so.

I don't know is this nano-pb is able to link in normal BLE_UART application

for sending message to phone through BLE

I some across this link for using protobuf in nrf52 but i didn't go thorough fully.

Can you come across this link before is it work?

[Edvin]

Sunil vignesh said:

Can you come across this link before is it work?

 I have not tested it, so I don't know.

Please note that there is no predefined file transfer service in Bluetooth Low Energy, so you will have to implement this yourself in a custom service. I am not sure whether this .proto/nano-pb is the way to go. Why do you need to use this to send a message to a phone? Can you not just send a message without the protobuf? Have you tried the ble_app_uart example?

Best regards,

Edvin