BLE FOTA example for Central device

Question

Hi,

Is there any example of a Central device which is able to connect to a peripheral and update it ? Im guessing the bluetooth_central_dfu_smp sample is probably the closest one to what I want.

Thank you!

Sigurd Hellesvik · Accepted Answer

Yes, that is the closest official sample. 
 A colleague and me have created this unofficial one which is the bluetooth_central_dfu_smp with some addes features. 
 https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples/client_smp/smp_client_ble 
 Disclaimer: 
 This code/configuration is not thoroughly tested or qualified and should be considered provided “as-is”. Please test it with your application and let me know if you find any issues. 
 Regards, Sigurd Hellesvik

Sigurd Hellesvik · Answer

Miguel Ferreira said: How did you find the zcbor package format to send ? It was based on this doc https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/services/device_mgmt/smp_groups/smp_group_1.html 
 Honestly, it was my colleague who did most of the zcbor decoding, and he is out of office. 
 But yes, the docs you link do is a good place to look. Also have a look how the official SMP Client example does things I guess? 
 Some official work is being done on a SMP Client, but it is not done yet. See https://github.com/zephyrproject-rtos/zephyr/pull/56934 . Maybe you can get some hints on how to work with zcbor from how it is done in the PR? 
 Miguel Ferreira said: Im getting no errors on bt_dfu_smp_command, but it enters in the if conditional anyway: "bt_dfu_smp_command failed with 0" Did you have something like this during your tests ? 
 It is a little while since I tested this last, but I can not remember this specific error. 
 Which version of the nRF Connect SDK do you use? Which board? 
 If you give these, I can try to see if I get the same. 
 It is odd that it fails with 0 though, as it is if(err). Which line is this on? 
 Miguel Ferreira said: Final question, the above says it fails but the command seems to run because I have the following reply: Error in image upload response: 3 . 
 From SMP Error codes , 3 = "Invalid value; a request contains an invalid value." 
 If I had to guess I would say you had either formatted zcbor wrong, or put some wrong data in the request or header. 
 Regards, Sigurd Hellesvik

BLE FOTA example for Central device

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