Not able to open USB port and UART 3

Hi all,

AT+WMFM=0,1,1 // OK for enabling UART1
AT+WMFM=0,1,2 // OK for enabling UART2
AT+WMFM=0,1,3 // ERROR (USB port Not able to open)
AT+WMFM=0,1,5 // ERROR (UART3 Not able to open)

I am able to open UART1, UART2 & USB CDC ACM but i am not able to open UART3.
AT+WDSO=0,5 (Trying to open UART3)

Please give me some suggestions, it would be really helpful to me.

Which module are you using? are you sure that particular module support UART3??


Hi alex,
Thanks for response. I am working on SL8082BTA module. But i am not sure UART3 will support or not. But i got to know from sierra docs, UART3 is not supported to SL8082T.

Hi Ganesh,
Yes, as per PTS, UART3 is not supported in SL8BTA.


Please send me email if you need support on opening UART3