Uploading new firmware to a low cost fitness tracker that uses NRF52832 chip, using the Nordic tools iOS app.

[Steve Rogers]

Hey guys,

i am trying to add new firmware to a cheap fitness tracker I have. After I write the new firmware in the Nordic SDK, I think I save it as a hex file. I’m not sure what to do next. 

I am not sure how to connect the tracker to the Nordic tools app. Is there a setting on the tracker I need to change to make it work? 

Many help of any kind at this point would be really great. Thanks in advance for your help and time. 

SR

[Mttrinh]

Hi,

What fitness tracker do you have? 

Is there a way to put it in DFU mode? if not, the fitness tracker you have probably doesn't support DFU.

[Steve Rogers]

I have a very cheap one. Here is the link. www.amazon.com/.../ref=mp_s_a_1_1

It says it uses over the air DFU. Just not sure how to put it in that mode. Can I cheat and just solder some pins from the nRF chip together or something like that?

[awneil]

I don't see any mention of firmware update at all on that page.

Even if it does support firmware update, that doesn't necessarily mean it will use Nordic's implementation.

A commercial product is likely to have protection in place to prevent you from loading "unauthorised" firmware ...