Hello again Guohui,
I am now trying to upload my firmware to redbear via DFU. I was following the guide at
but it says that
Note: All the drivers mentioned here are for the Duo that running the Particle firmware. For the Duo that running the WICED application hasn't implemented the USB device capability
Does this mean that I can only send my code via rblink only?
---- EDIT ----
Sorry, I just went ahead and followed the guide, I was able to send my program to redbear duo successfully. Still, can you please tell me the reason of the warning for Wiced applications?