The fitness bracelet on the Nordic nrf52832 chip died during the upgrade. Now it is dfutarg and when connecting, it gives an error. I can not find the firmware. how to remove firmware from a work bracelet, then flash a broken one.
That's so sad. Unfortunately I don't think we are able to help you much.
If the manufacturer does not have data read protection and if you have some knowledge of embedded programming you could try to get your hands on a DK (development kit) from Nordic and read the flash out of the defected board, but you need to have access to the SWD pins on the nRF chip. I don't know if this will be doable or not at all and it will maybe be too time consuming for you.
The easiest way is to keep trying to contact the manufacturer and wait for their answer.
