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I am working on GSM900A module and Arduino Uno R3.
I am getting output as following while sending an SMS using AT commands:

AT+CMGF=1
Ok
AT+CMGS="+91 10digit mobile number"
message
ERROR

And SMS is not sent to the particular 10 digit number. How can I overcome this problem.

gre_gor
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Niharika Erigineni
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2 Answers2

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The format to send sms is:

AT+CMGS=<number><CR>
<message><CTRL-Z>

Please check if you have added the carriage return after your number. Also, you have to wait for > symbol before you type the message. After the message is typed, give CTRL+Z. You can find the equivalent ascii or hex values for these in ascii table.

Developer Guy
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Ramya Baladhandapani
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0

amek sure there is no space between +91 and mobile number I was also getting this errors because i did not enough power to gsm module. Make sure you are giving enough current. I think 2A should be fine

Deepansh Parmani
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