I have some mistic problem width q2687 and simcard . I use the 2687 for a long time and i look
a mistic problem .
Some times when the module start not communicate widt the sim card . In these fact the simcard
from the open at not able to initilized .
My development have a periodikal function the module weakup and start connection abaout 20 time
on a day . And from the 20 time abaout 3 - 4 time the module not found the sim card .
But not send any error .
If it didn’t “send any error”, how do you know that it didn’t “find” the SIM card?
Remember that a SIM card takes a certain amount of time to initialise, and that time can vary - especially between different SIM cards!
Are you sure that your application is not attempting to use the SIM before it is ready?
I wait for the sucessfull event , but not arrived . And if these happen if stop the openat software
and send manualli the at+cpin and i get ERROR . Meyba the sim card not reacheable . The open at
adl_simsubscribe not send any error event.
I use the AT commands set to drive my Q2687 on the UART and sometimes the SIM is not detected.
In this case, the “AT+CPIN?” response is “+CME ERROR: 10” (meaning SIM not inserted).
Then when I reset power supply, the response is OK, SIM card is detected.
I haven’t find yet a way to solve this problem by an AT command.
I am using a Q2687, it had firmware version 663 on it. The modem sent back the wind indicators +wind:0 and +wind:12,0 which means that sim presence pin detected a sim removed and the latter meaning an interruption has occurred on start up
I have since upgraded this firmware to 72_00g and now the modem does send any wind indications on startup. The sim card is in place and if used on another modem works fine and I think everything is OK. What am I doing wrong.
I cannot find any supporting documentation to enable the wind indications. I issue the command at+wind =1 and when i issue the command at+wind?, the modem returns the wind indication +wind:1. I have issued the at command at+wopen=1 but the wind indicators are not coming through. Do you have a reference perhaps of where I can find the correct way of enabling the wind indications.
By the way, why was the modem only giving me the indication +wind:0 and +wind13,0 when I was using the firmware version 663? The sim card and all of the other things were good.
Each time I issue the command at+wind=? the reply from the bad modem is :+WIND: (0-32767)
The good modem when issued with the same command replies with +WIND:32767. What does this mean?
I have found that AT+WIND=63 is used to Ask the modem to display the general indications . I have since issued this command and now when I reset the modem is sends the reply +wind: 3,+wind:1,+wind:4.One step forward at least, also the modem seems to want you to issue the command at +wind = 32767 for it to give me similar wind replies as the modem I say is good. It sends all the wind indicators that I want now but the reply to at+wind=? still goes back to +wind:(0-32767)
what does this mean