Using UART1 for PPP and UART 2 for AT commands


#1

When not running an OpenAT application can you send AT commands to both UARTs on a Q24plus?
I have always assumed that you can, but have not been able to try it because I don’t have a set up that connects to both UARTs on the connector.
What I would like to be able to do is plug a Q24plus into a PCB that has a USB to serial chip on it and gives you 2 USB serial ports, one for the data connection and once for checking the signal quality and sending/receiving SMS - all without using multiplexing (AT+CMUX). Does anyone know if anyone makes something like this?
Does the USB IESM let you do this?

Thanks.
Charles


#2

You - can also do it when an Open-AT application is running! :smiley:
(unless, of course, the application puts the UART into Data mode, or something)

ftdichip.com/FTProducts.htm#FT2232C
ftdichip.com/Products/FT2232H.htm
ftdichip.com/Products/FT4232H.htm

However, note that UART2 is disabled by default; you have to enable from UART1 - so it might be better to use UART1 as your “control” port, and UART2 for the “data” connection?

The USB IESM gives you access to both UART2 and the USB port - and you can also send AT commands on the USB port! :smiley:
This effectively gives you three UARTs…

The same applies about enabling the USB port…


#3

That is true, but I do not really think there is IESM to Q24PL. IESM is extension card for Fastrack Supreme series


#4

Actually, I wrote that - not charlesoram

True.

I only mentioned it because charlesoram asked about it…


#5

Sorry, that’s my very begining in quotation :slight_smile:


#6

Hi,
Thanks for all your replies.
Yes, I meant the fastrack Supreme when I was asking about the USB IESM.

  • Charles

#7

And you do realise that the Fastrack Supreme is a Q26 inside - not a Q24?