Enabling DFU service in application

[Dhiraj]

Hello,

I am using MDBT40 (www.raytac.com/.../MDBT40 spec-Version A5.pdf) in my project. Also I am using arduino IDE to create .hex file for MDBT40 using this reference link- github.com/.../arduino-nRF5

I tried OTA- DFU example provided in SDK V11 (S130 SoftDevice v2.0.0) infocenter guide. I created .zip file created by nrfutil.exe which includes .hex file arduino IDE and It worked fine.

Steps which I followed:

1. Erase all (using nrfGo studio)

2. Used bootloader example provided in install folder/nRF5_SDK_11.0.0_89a8197/examples/dfu/bootloader/hex/dfu_dual_bank_ble_s130_pca10028.hex

3. Created .zip file using nrfutil.exe (using .hex file created by arduino IDE)- Command used: nrfutil.exe dfu genpkg --application Blink.hex --application-version 0xffffffff --dev-revision 1 --dev-type 1 --sd-req 0xfffe final.zip

4. Nrf-toolbox app in android to upload .zip (directly uploaded without using 0x001 command)

5. Done.

However, I want to enable DFU service in my application for consequent OTA update.

How can I enable DFU service in my application written in arduino IDE?

Creating .zip which includes application.hex file and dfu_dual_bank_ble_s130_pca10028.hex will work? I tried this, but code size exceed the limit to update firmware over the air. Just including bootloader will do my job?

"Extending your application" guide mentions that I need to include three files. Do I need to include this file in arduino sketch?

Thank you.

[bjorn-spockeli]

Hi Dhiraj,

the Infocenter guide you're referring to explains how to add DFU support to an application that is written in C, i.e. using our SDK directly and not through a 3rd party library. Thus, including the 3 files mentioned in the guide will not work.

I took a quick look at sandeepmistry's arduino-BLEPeripheral library and it appears that you will have to create the DFU service using the .cpp source, like sandeep did for the HID example.

If you need support for Device Firmware Updates in your project, then I would recommend moving from the Arduino IDE and Sandeep's Library to using our SDK in Keil, Eclipse or Segger Embedded Studio.

Bjørn

[Dhiraj]

Hello,

Thank you for the reply. I referred to this link of redbear labs that uses MDBT40: github.com/.../BLE_SimplePeripheral.ino

This code uses DFU service and has .cpp source as you mentioned for the DFU service. Further this link explains about FOTA: developer.mbed.org/.../Firmware-Over-the-Air-FOTA-Updates

This should work in my case right?

[bjorn-spockeli]

Yes, if your comfortable with going from arduino code to mBed code, then this should work.

[Dhiraj]

Hello,

I merged two hex file:

1. Blink.hex compiled using arduino IDE
2. nrf51422_xxac_s130.hex from \installed folder...\ble_app_hrs using srec_cat.exe

I used this command: srec_cat.exe nrf51422_xxac_s130.hex -intel Blink.hex -intel -offset -MAximum-addr nrf51422_xxac_s130.hex -intel -Output_Block_Size=16 -o output.hex -intel and successfully generated "output.hex" file

I tried loading this firmware using nrfgostudio with s130 softdevice from SDK11.

Few observation:

1. When I first mention Blink.hex file in srec_cat command like this: srec_cat.exe Blink.hex -intel nrf51422_xxac_s130.hex -intel -offset -MAximum-addr Blink.hex -intel -Output_Block_Size=16 -o output.hex -intel the output.hex behaves as if only Blink.hex is uploaded and nrf51422_xxac_s130.hex has no effect.

2. opposite to above (nrf51422_xxac_s130 when mentioned first in cmd)

Am I going in right direction?

[Dhiraj]

I am merging the two files to include DFU service from ble_hrs example to my code written in arduino ide.

[bjorn-spockeli]

I recommend that you use mergehex( part of the nRF5x Commandline Tools, available here).