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Topic: Seeedstudio GPRS shield question (Read 2 times) previous topic - next topic

48X24X48X

When you use the SIM on a phone, when you boot the phone up and if you need to key in the 4-pin thingy, then it's considered as locked.
The command AT+CPIN=? will let you know whether it's locked or not.
It's kinda scary if you wrongly write them in the firmware (after 3 times, it's locked).
For a GSM module which I wrote the library for (not SIM900), I omitted this SIM pin code function fearing someone might wrongly enter them for 3 times!

liudr


I've got this shield. It works perfectly: SMS & Data !



Thanks!

What AT commands do you use for data?

liudr


When you use the SIM on a phone, when you boot the phone up and if you need to key in the 4-pin thingy, then it's considered as locked.
The command AT+CPIN=? will let you know whether it's locked or not.
It's kinda scary if you wrongly write them in the firmware (after 3 times, it's locked).
For a GSM module which I wrote the library for (not SIM900), I omitted this SIM pin code function fearing someone might wrongly enter them for 3 times!


Thank you! I don't think I saw a pass word screen when I power up the phone. I will surely give it a try when I get the shield.

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