How to make beacon connectable

[arjun]

Hi Nordic,

I am trying to implement DFU-OTA in beacon. For that I am trying to make beacon connectable. My requirement is to work the beacon in non-connectable mode during normal operation whereas for implementing DFU, I need to make it connectable by using a button press.

What I have implemented - when a button is pressed, I stop the advertising and start the connectable advertising.

Issue faced- I am not able to perform DFU. My reasoning is that, since I have copied the DFU relevant code snippets from working example code, there is nearly no chance of error in DFU part. So I am guessing the issue lies with transition from non-connectable to connectable mode.

Is my implementation for connectable mode correct?If there is a better way of implementing the following, please suggest..

[Hung Bui]

@arjun: Please describe in more detail what exactly happened when "I am not able to perform DFU". Have your beacon enter DFU bootloader ? What kind of implementation have you done ? Have you flashed the bootloader ?

[arjun]

Hi Hung, I have implemented in the following manner -

I am generating an interrupt using a button. When the button is pressed, the device stops advertising (non connectable by default) and starts advertising in connectable mode.

I flashed the softdevice and bootloader from the nrfgo studio. I flashed the application using DFU. when I press the button, the device switches from non-connectable mode to connectable mode. when I press the DFU icon, it gives the following notifications-

Starting DFU->Starting Bootloader->Connecting(stays here for some time)->Disconnecting->Connecting(again stays here for some time)->Disconnecting->DFU failed and stops advertising .

[Hung Bui]

You need to implement dfu buttonless service so that the application can switch to bootloader to do DFU.

Without that, how would you expect the DFU bootloader work ?

Another option is that you switch directly to DFU bootloader when you press the button (skip the advertising in connectable mode) .

[arjun]

For implementing DFU buttonless service,the device needs to be in connectable mode, right??

As per my application requirement,I want the node to act as beacon.Beacon is a non-connectable device. Thus for implementing DFU-OTA, I would need to make it in connectable mode.

Could you give some suggestions on implementing DFU bootloader using button press..

[Hung Bui]

You are right, you just need to follow the documentation.

By default, the bootloader will enter DFU bootloader mode with Button 4 as in the documentation here.