RTL8720DN AT firmware issue

I am using RTL8720DN for a project and I am looking for an AT firmware that uses a serial port other than PB1 and PB2.

Is there anyone who has experience with this and can help me out? Or perhaps provide me with the AT firmware source code?

Any help would be greatly appreciated. Thank you.

Hi @Zhou

What AT firmware are you using? The GitHub standard SDK also has AT command functionality, but it uses PA18 PA19 or LOG_UART by default.

It sounds like you might be using the default firmware provided by B&T on the module. Do you see a large ASCII B&T logo when you reset?