Rikr09
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SimCard Sim900 doesnt work once you take it out
Hello,
Im from Colombia and im having some troubles with the SIM900 Module. I designed a board with a microcontroller and the SIM900 module, all the system works excelent until some days ago when i discovered a problem wich is that:
i insert the MOVISTAR simcard and turn on the board and it registered correctly, then i turn off it and remove the simcard and turn in on the card again wothout the Sim; obviously it doesnt have to register, i try some AT-commands and the module responds normally, theres no problem yet. Now i turn it off, insert again the SimCard and turn it on the board, and i dont know why now the Sim DOESNT REGISTER :sad: ... anymore ! I have to remove it, insert another one, wait until it register and then reinsert the firs one.
These are the messages wich i received from the module:
I never had made this, so i didnt be attent to this problem, i dont know what to do.
So , please i need your help.
Thanks!
Hello,
Im from Colombia and im having some troubles with the SIM900 Module. I designed a board with a microcontroller and the SIM900 module, all the system works excelent until some days ago when i discovered a problem wich is that:
i insert the MOVISTAR simcard and turn on the board and it registered correctly, then i turn off it and remove the simcard and turn in on the card again wothout the Sim; obviously it doesnt have to register, i try some AT-commands and the module responds normally, theres no problem yet. Now i turn it off, insert again the SimCard and turn it on the board, and i dont know why now the Sim DOESNT REGISTER :sad: ... anymore ! I have to remove it, insert another one, wait until it register and then reinsert the firs one.
These are the messages wich i received from the module:
Code:
Firts time with the Simcard:
Setting...
+CFUN: 1
+CPIN: READY
+CGREG: 0
Call Ready
+CGREG: 1
Without SimCard:
Setting...
RDY
+CPIN: NOT INSERTED
+CFUN: 1
+CGREG: 0
Here is when it doesnt register:
Setting...
+CFUN: 1
+CPIN: READY
+CGREG: 0
Call ReadyI never had made this, so i didnt be attent to this problem, i dont know what to do.
So , please i need your help.
Thanks!
Last edited:
