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The simple way to check SIM900A

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PA3040

PA3040

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Dear All
I Purchased this GSM Modem

**broken link removed**

Please advice,
what is the easy way to check that modem is working
I am using windows xp
Please advice
 
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Connect the module to your computer using RS232, (USB to RS232 bridge cable can be used), and send the AT commands. the module will reply OK. At first start up the module is at auto-baud, so any baud rate should be fine. Or you can try some common baud rates like 9600, 19200, 57600 etc...
Also read SIM900 user manual for details regarding AT commands.
 
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    PA3040

    PA3040

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Dear All

Now my modem is working and I can send and read the SMS using puTTY and now I am studding AT commands

My first question is
1.How can I check that the receiver read the SMS and unread the SMS? using puTTY ...any AT commands
2.Let's assume the following At command

AT+CMGR
This mean read SMS message

So I need to know that what is the meaning of C and M and G and R

Thanks in advance
 
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You are asking for the nomenclature of the commands which will be known only to the manufacturer...

There is no way to find out whether the receiver has read the sms or not...Only we can confirm the delivery of the sms but not the read status...
 

which command that we can use to check that message has been delivered
 

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