SIM900A-how to check sim900a modem ?

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N.Karthick

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1.how to test a GSM module.

2.before connecting hyper terminal.

3. because send and receive problem in hyperterminal ? on loop connection it works properly but in modem?
 

Your question is not clear about what you want to achieve.

I would recommend power up your module as described in the user manual and later try to communicate via UART from PC terminal. You can use teraterm for that.
 

N.Karthick said:
1.how to test a GSM module.

2.before connecting hyper terminal.

3. because send and receive problem in hyperterminal ? on loop connection it works properly but in modem?
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1(Ans) You can test your GSM with hyper terminal or with stand alone controller with AT commands.

2and 3(Ans) I think its easy to test the GSM module with hyper terminal with just only serial cable.What kind of send receive problem you having?
 

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