i’ve written an application which communicate with an Embedded Software in a Fastrack Xtend over the RS232 Port. The Application sends AT Commands, and the Fastrack Xtends answer with AT commands. It works very well. Now I tried to use the USB Port for the same application. The connection works but there are problems with the incomming data.
-the PC application send the command: “at+show” to the embedded Software
- now the embedded software have to answer, with a lot of at commands:
“at+version = 2”
“at+date = 27.07.10” …
but there comes no data, only when I send after the “at+show” command the at command “at”, then the USB Port on the PC receives first the “OK” answer and then the whole data (answer of the “at+show” command.
I hope there is someone who can help me.