SparkFun Forums

[qwertqwert3]

whenever i turn the chip on it only works for like 3 seconds, where i can send it AT commands.. Then it doesn't respond to anything.

Same thing happens when I turn it off.

[qwertqwert3]

I realized I did an AT#SHDN command and i think that messed things up.
It apparently detached the "network" or something.. How to I
reattach?

[Renault]

You need to switch it back on by taking the ON/OFF pin low for a sec or 2, it should then take a couple of seconds to register to your mobile network, you'll see the status LED flashing like once every 3 seconds once it is connected. Also your power supply needs to be able to supply enough power during this connection/attaching stage, otherwise it'll just go dead again.

HTH

[qwertqwert3]

I don't think that's the problem, because I have tried resetting it several times with the power button (i have the telit development board that sparkfun makes).

It flashes green when I turn it on.. I can't remember if it remains flashing every three seconds.. I will check when I get home, but i definitely have enough power to it.

Like i mentioned, i have control of it for about 5 seconds, then I loose it.. And the problem is not power, and I have tried manually resetting the unit with the power button several several times..

Thank you for the hlep

[leon_heller]

Have you got a 100 uF tantalum capacitor on the power input. close to the device?

Leon

[qwertqwert3]

http://www.sparkfun.com/commerce/produc ... cts_id=280
That is what I have. I'm sure the sparkfun guys put one there right?

[qwertqwert3]

Can noone suggest something>?

[qwertqwert3]

Now I can't gain any access to enter AT commands..

Everything should be working.. If i remember correctly, I tried to execute a python script and that didn't work, so I had to force a hard shutdown when it seemed to have frozen up while trying to execute my python script.

Please, guys, this is such an important project and I have a deadline soon. Could you guys help me out? Could I have a defective chip?

[qwertqwert3]

I also realized that some time (could have been immediately before it stopped working) my computer might have told me something like my drivers were going to sleep or something?

[qwertqwert3]

N/M