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I used a micro-processor to send AT command to a HSDPA module via UART. However, when the " ATD *99# " is sent and the " CONNECT " is therefore received, the micro-processor can not send commands to the HSDPA module any more. Does anyone know to how to manipulate the module in this step.
Thanks.
An escape sequence will be required. I'd try starting with the Hayes one: http://en.wikipedia.org/wiki/Escape_seq … em_control
I have tried "+++" as your suggestion, the HyperTerminal is still blocked. In this situation, unless I disconnected the HyperTerminal and connect it again, I can not type characters any more. I am very appreciated for your further suggestion.
Unfortunately I'm out of my depth on this one. Just one thing - did you make sure you left a 1 second gap before and after the '+++'?
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