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July 1, 2010
about 6 years ago
Got some problems getting my shield to register to the network. The first 3 sim cards I tried returned 1,3 to a AT+SSIMT. (Not ready / Invalid card). Found an old card that returns 0,0 (Success / SIM card) but still wont register to the network. If I put it in my phone it registers just fine. The SM5100 module has got a real gsm antenna attached.
+SIND: 7 (emergency calls only)
+SBAND: 4 (GSM 900 and 1800 as we use in Norway)
+CME ERROR: 30 (no network service)
+CREG: 3 (Network registration is denied)
+CSQ: 16,99 (decent signal..)
Now I am quite lost… Anyone has a clue as why the module wont register to the network?
Well after some (way to many) hours I managed to fix this issue with the help of only 2 pieces of wire. Hooking port 2/3 to rx / tx on the arduino and setting the baud-rate to 115200 made it possible to sent AT commands to the GSM card trough the arduino. Now it is set to 9600 baud and the pass trough example works :)
Got my shield but looks like Im stuck cause of wrong baud setting on the module :( As I dont have a FTDI cable nor a RS232 breakout cable I dont have a clue how to fix this. When running the serial passtrough example my serial monitor says:
Starting SM5100B Communication…
? )?? ? ? ? ??i??? ? )?? ? )?? ? ? ? ? )?? ? ? ? ? )
Any solutions on how to fix this without ordering another cable?
No public wish lists :(
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