Make BLE Central send firmware to DFU Bootloader

[Goature]

Hello all!

I've been researching DFU over BLE, between a central and a peripheral.

The peripheral is possible to upgrade over the DFU Bootloader. I've tried upgrading this unit with the MCP from nordic, and it works.

However, when i try to initiate the DFU on the peripheral, using my central device, by writing 0x01 to the DFU Control Point of the peripheral - i receive {0x10, 0x01, 0x06}. Does the 0x06 mean that the process was unable to start? (infocenter.nordicsemi.com/.../bledfu_transport_bleservice.html

What am I doing wrong here? Is this not the way to start the process?

[bjorn-spockeli]

Hi Goature,

Yes, error code 6 is Operation Failed: Response if the requested procedure failed.

The DFU image transfer procedure is explained in detail here. In order to start and initialize DFU you have to

1. Enable DFU Control point notification ( Write 0x0001 to the CCCD of the Control Point Characteristic)

2. Write the start DFU Op code 0x01 followed by the DFU Type ( 0x01 = SD, 0x02= BL and 0x04 = App)

3. Write the Image size to the to the DFU packet characteristic

Best regards

Bjørn

[Goature]

Thank you very much, got the whole thing working now :-)

[Lora]

Hello Goature,

I contact you because I have a problem on the firmware transfer, I did not get to receive the notification after writing 0x03 on the dfu control point.

I started by enable CCCD

1- I made write 0x01 0x04
2- I wrote the size write "0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x20 0xac 0x00 0x00"
3- I received the nitify 0x10 0x01 0x01
4- I wrote write 0x02 0x02
5- I did init_data write "0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0x01 0x00 0xfe 0xff 0xb3 0x3c"
6- I received the good notify on the control point 0x10 0x02 0x01
7- I did write 0x03
8- stream data file .bin

no notify, normally I am supposed to receive the notify 0x10 0x3 0x01

could you help me please?

thank you,

[Lora]

Hello Bjorn-spockeli,

I contact you because I have a problem on the firmware transfer, I did not get to receive the notification after writing 0x03 on the dfu control point.

I started by enable CCCD

1- I made write 0x01 0x04
2- I wrote the size write "0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x20 0xac 0x00 0x00"
3- I received the nitify 0x10 0x01 0x01
4- I wrote write 0x02 0x02
5- I did init_data write "0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0x01 0x00 0xfe 0xff 0xb3 0x3c"
6- I received the good notify on the control point 0x10 0x02 0x01
7- I did write 0x03
8- stream data file .bin

no notify, normally I am supposed to receive the notify 0x10 0x3 0x01

could you help me please?

thank you,

[bjorn-spockeli]

HI Lora, 

I apologize for the late reply.

WHich SDK version are you using? Is it SDK v11? If you have sent the entire image then yes, you should receive a notification with opcode=0x10 reqopcode=0x3 and respValue =0x01 according to the DFU image transfer procedure. Have you verified that the size sent in step 2 matches the number of bytes that have been sent to the DFU Packet characteristic?

Best regards

Bjørn