NRF DFU updtae over BLE from ESP32

[mayuri]

Hai,

    I am currently working on  dfu_secure_bootloader example  for NRF52840 update...When i tried with nrf connect app , sent a zip folder nrf gets updated  and  its working fine.

    I am able to connect NRF52840 with esp32 through bleutooth when i tried to send a  char ,nrf didn't receive any character and it is not showing any error . is it possible to send char or zip folder from esp32  to nrf through bluetooth. 

[Simon]

I would recommend you to read about the DFU protocol and the BLE transport layer specifically to get an understanding on how transfer a packet over BLE through the Secure DFU Service (which the secure bootloader implements).

Best regards,

Simon

[mayuri]

Hai,

     As per the DFU protocol i can able get response untill init packet sending . when i tried to send a init packet (.dat file which is in zip folder) ,but i am not getting any response from NRF.

[mayuri]

Hai ,

       When i used app to  connect with dfu ,i am able to send data to two different characteristic uuid . as the same process with esp32 able to write with one characteristic  uuid , to send the init packet as per the protocol i have to use another characteristic uuid. 

can you please help me out to solve this?? if u have any  idea....

thanks,

[Simon]

I am sorry for the delay, I am currently looking into your issue and will try to provide you with an answer as soon as possible.

[mayuri]

hai , 

 thanks for ur response , i am able to send an init packet and now i am moving over the step to send bin file to update from esp32  and alse  i want  to change this  to buttonless (to enter into the bootloader mode ) how to change the buttonless mode ??