My Bluetooth module(RFD22301) can't upload firmware

[TL730]

Hello! I'm interested in brain computer interface and brain cognition. I'm going to do a multi brain computer interface experiment. I spent a lot of money and time to make 10 printed circuit boards, but upload firmware error! The problem is the RFD22301 Bluetooth module.
Is the Bluetooth module I bought fake?
But I bought them from three suppliers, none of them can.
This Bluetooth module is less used and expensive. No one wants to imitate it, right?

[My1dream]

Like you, I want to ask if this library can still be used, and how to solve this problem

[TL730]

The firmware should be usable. I bought the board of the official website and re uploaded the firmware successfully. Rfd22301 bought by yourself is not successful. At 2022-01-20 19:29:33, "58000" ***@***.***> wrote: Like you, I want to ask if this library can still be used, and how to solve this problem — Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you authored the thread.Message ID: ***@***.***>