Modem MC52i | Telit Cinterion IoT Developer Community
February 22, 2016 - 1:32pm, 3094 views
Hi, i have a problem with this modem, it works in the right way for few days than it goes in a kind of sleep mode, the status led is off. So i open Hyper Terminal and call the status with AT command AT&V, after that it work again. I use the command AT+CFUN to see the state and it take out the value 0, is it right? There is some driver update?
thank you
Hello,
0 would mean NON-CYCLIC SLEEP mode. In that mode you should not have access to serial interface.
Can you check what mode is configured when the module is working as expected? There should be 1 if you don't use any sleep mode.
Please also check AT^SSYNC? and ATI replies.
Are there any negative effects for your application?
Can you write more about what your application is doing?
Regards,
Bartłomiej
Hello,
i check as soon as possible. But i don't understand which is the right settings to avoid the sleep mode.
This modem send sms in case of fire alarm and is very important that it is always working.
thank you
Massimo
Hello,
You should set AT+CFUN=1 to deactivate power saving (this is the factory default setting also).
Regards,
Bartłomiej
*****,
today i checked the modem configuration. The command AT+CFUN? return the value 1 and the command AT^SSYNC return value 1.
Everything seems right!
Is there any other test that i ca do?
thank you
Hello,
So it seems that AT+CFUN and AT^SSYNC are set to their defaults (for the terminal) and that's correct.
Could you also check ATI response?
For now it's hard to say what can be the cause of this behaviour.
Do you have any logs - it could be helpful to see what was going on before the LED went off.
On the other hand as I understand when the LED goes off you connect via serial, issue some AT command and the terminal replies. Have you checked if it would also be possible to send the SMS? In your scenario the terminal is always on. Maybe it would make sense to turn it on only for sending the message? Or there's other reason to keep it on.
Regards,
Bartłomiej