+CMS ERROR: 512,how to recover Q2687


#1

Hi, guys
When I send sms via Q2687, I meet a error, the error code is 512, how can I recover my Q2687 modem?
Thanks for any help!


#2

“+CMS ERROR:512” indicate ‘MM establishment failure’.
This error occurs when you try to send a message and the module is receiving another one at the same time. This causes a collision in the message transfer protocol resulting in failure in sending the SMS and hence, +CMS ERROR: 512.

How can I cancel the old sms which not send out, before I send new one?
Thanks for any advise!


#3

Nobody know how to do? :frowning:


#4

You just need to re-try the message


#5

How to re-try? send any SMS via AT+CMGS command, aways return the same ERROR code 512.


#6

Can I clean the unsend sms queues via AT command or ADL API. I am new, wish someone can help me!


#7

Be the way,
My Q2687 firmware version : R71_00gg.Q2687G 2090888 041808 13:46


#8

when my mode in the ERROR:512 status, it also can not recieve any SMS.


#9

Is the modem correctly registered to the network?


#10

Or does your provider have SMS service enabled for your account?


#11

As previously noted, “+CMS ERROR:512” indicate ‘MM establishment failure’ - so it’s more likely to be something basic with the RF link than something “higher-level” like service options. :question:

If it was a service restriction, I think you’d get some other error than “+CMS ERROR:512” :question:


#12

at+creg?
+CREG: 1,2

OK
according the stat 2 return,
it is not registered, ME currently searching for a new operator. how to do?


#13

before this ERROR, I can send SMS with the Q2687 modem, and I also can send SMS when I plug this SIM card into another Q2687 modem.


#14

I check my Q2687 setting , it as following,
AT+CSCA?
+CSCA: “+6596197777”,145

OK
at+CNMI?
+CNMI: 2,1,1,2,0

OK
AT+CMGF?
+CMGF: 1

OK

do u thinks any other wrong?


#15

you mean these was a hardware problem or firmware exception? so now, it is not any good method to recover the modem, right?
should I flash the firmware?

I check the signal , it seems no problem, and can also connect network. the checking procedure as following,
at+csq
+CSQ: 11,0

OK
at+cops?
+COPS: 0,2,52501

OK
at+cind?
+CIND: 4,1,0,0,0,0,0

OK


#16

Hi! Guys

I resolve the problem with WREGC command.

AT+WREGC=0
OK
#then check registed status
AT+CREG?
+CREG: 1,1

OK

now it is ok, Can send SMS successfully!


#17

I had to look that one up:

Which does, indeed, fit the symptoms described - an ‘MM establishment failure’ makes perfect sense!


#18

Thank Awneil for your nice analysis conclusion!