CME Error 811


#1

Hi All,

I am trying to establish a TCP connection using a Q2406B modem.

Sometimes, when I send the AT+WIPBR=4,6,0 command, the response is CME ERROR:811.

This error is described in Error Codes List as “bearer connection failure: sim not ready (no pin code entered,…)”, but I have already entered the pin.

Furthermore, if I send the “AT+CPIN?” command, the response is “+CPIN:READY”, so the pin code has been effectively entered.

Any ideas about the cause of the 811 error cause?

Thanks in advance


#2

Is that before or after you’ve received the 811 error?

ie, do you issue “AT+CPIN?” and ensure that you have the “+CPIN:READY” response before you issue the AT+WIPBR=4,6,0 command :question:


#3

I have tried to send “AT+CPIN?” before and after the AT+WIPBR=4,6,0 command, and I receive “+CPIN:READY” in both cases.

Therefore I think there is another reason different from SIM PIN, but I don’t know what…