Cellular Shield with SM5100B and more then one SMS

Development Boards Arduino
1

Hi,

I’m working with the Cellular Shield with SM5100B and the Arduino uno. It was quite simple to send the first SMS using the tronixstuff-tutorial by John Boxall.

But as quite a number of other users in the “comments”-part of the Product Info I can’t send a second SMS after the first one. After starting or resetting the arduino, the initial SMS goes out without problems.

I didn’t find a answer to this question anywhere, please help.

2

We solved the problem of the GSM module locking up after sending one SMS. It turns out that if you use cell.println() on the function that sends the message text will lock up your module. The tutorial has been amended to reflect this. http://wp.me/pQmjR-1bM

Cheers

john

3

I have the same problem and the print() instead of println() it doesn’t change anything.

Any other suggestion?

4

Has anyone found an answer to this ?

SM5100B continues to lock up after sending first SMS.

As stated in previous post Serial.print() instead of Serial.println() makes no difference.

Using a terminal (puTTY) it looks as though the modem is expecting a command, but continues to report the +CME ERROR:4 - ATZ returns ‘OK’ but even then only a full reset of the Arduino works.

Colin

5

lighthouse:
I have the same problem and the print() instead of println() it doesn’t change anything.

Any other suggestion?

You should use cell.write((byte)26);