GPRS Shield 2.0 Receiving SMS

Ardiuno Compatible shields

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schlaubi5199
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GPRS Shield 2.0 Receiving SMS

Post by schlaubi5199 » Thu Aug 09, 2018 7:57 pm

Hello,
I have the Seeed GPRS Shield 2.0b. Sending SMS messages and making a call works without any problems. However, receiving SMS messages causes problems. If I execute the AT command AT+CMGL="REC UNREAD",1, which should list all unread messages, I get the following output AT+CMGL="REC UNREAD",1$$$$OK$$ although I sent an SMS shortly before (I replaced \n\r with $). What am I doing wrong?

Thanks for your help

hong.jiang
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Re: GPRS Shield 2.0 Receiving SMS

Post by hong.jiang » Fri Aug 10, 2018 10:33 am

Hi:
Could you please give me a screenshot ? This will allow me to understand your problem more intuitively . And I find a AT Command document https://seeeddoc.github.io/GPRS_Shield_ ... _v1.11.pdf that may can help you.The AT+CMGL introdution is on page 102 .

schlaubi5199
Pre-kindergarten
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Re: GPRS Shield 2.0 Receiving SMS

Post by schlaubi5199 » Fri Aug 10, 2018 1:53 pm

I tried again here. First I tried to call someone, which worked without problems. However, if I want to list my SMS messages it does not work. I always send the input with a \n\r at the end. \n\r have been replaced with a $ in the output.
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