Type “at+ipr?” followed by ‘enter’ to confirm the modem’s communication speed. The modem should respond with +IPR: 19200 and OK.
Now, change the communication speed to 115200bps by typing the following AT Command “at+ipr=115200” followed by enter.
The response “OK” after sending of “at+ipr=115200” confirms that the speed of the modem has changed to115200.
After that “OK” response, you can’t type any other AT Command in HyperTerminal. The Hyper Terminal speed has to be changed to 115200.
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