CODEWITHSUNDEEP
at-commandsim800l
RazvanPopescu23
RazvanPopescu23

Reputation: 31

SIM800L: AT+CIICR always goes to PDP DEACT state

I'm trying to send data to a server using my SIM800L which is connected to a LoPy. Using the attached diagram I want to go from state 0 to 6 in order to send and the issue I encounter is at state 2 ( AR+CIIR that returns an error ). SIM800L diagram

I know that only AT+CSTT=“apn”,“pass”, AT+CIICR and AT+CIFSR where needed but I’ve used the other commands to show more usefull(?) info.

My output: 

=========== ATI =============
ATI
SIM800 R14.18

OK

=========== AT+CIPSHUT ===========
AT+CIPSHUT
SHUT OK

=========== AT+CIPSTATUS ===========
AT+CIPSTATUS
OK

STATE: IP INITIAL

=========== AT+CSTT ===========
AT+CSTT="internet.vodafone.ro","",""
OK

=========== AT+CIPSTATUS ===========
AT+CIPSTATUS
OK

STATE: IP START

=========== AT+CGATT ===========
AT+CGATT?
+CGATT: 1

OK

AT+CGATT=1
OK

=========== AT+CGDCONT ===========
AT+CGDCONT= 1,"IP","internet.vodafone.ro","0.0.0.0",0,0
OK

=========== AT+COPS ===========
AT+COPS?
+COPS: 0,0,"CONNEX GSM"

OK

=========== AT+CREG ===========
AT+CREG?
+CREG: 1,1

OK

AT+CREG=1
OK

AT+CREG?
+CREG: 1,1

OK

=========== AT+CIPSTATUS ===========
AT+CIPSTATUS
OK

STATE: IP START

=========== AT+CIICR ===========
AT+CIICR=?
OK

AT+CIICR
+PDP: DEACT

ERROR

=========== AT+CIPSTATUS ===========
AT+CIPSTATUS
OK

STATE: PDP DEACT

=========== AT+CIFSR ===========
AT+CIFSR
ERROR

=========== AT+CIPSTATUS ===========
AT+CIPSTATUS
OK

STATE: PDP DEACT

I don't know why it does not work to pass to state 3, any help is usefull, thank you !

Upvotes: 3

Views: 7358

Answers (2)

cmaglie
cmaglie

Reputation: 151

I had the same problem, after AT+CIICR I always got PDP DEACT error. After a week of trial and error I found it was the wrong APN value I used, instead of mobile.vodafone.it I had to use web.omnitel.it.

This is explained here https://www.vodafone.it/aziende/supporto/sim-e-smartphone/apn-mms-tethering.html in a very convoluted way (2 lines in a wall of text).

So my suggestion is to triple the check your APN value. If in doubt try all the possible values your provider suggests...

Upvotes: 0

T.Kalweit
T.Kalweit

Reputation: 31

I also used a Vodafone card and in my case the problem was that the TinyGSM libraries are used for the APN data in the gprsConnectImpl routine for the IP.

In the TinyGsmClientSIM800.h you can find the line

sendAT(GF("+CGDCONT=1,\"IP\",\""), apn, '"');

But Vodafone needs an IP here, so I changed the line as follows for testing purposes:

sendAT(GF("+CGDCONT=1,\"IP\",\""), "139.007.029.017", '"');

The information about this can be found here: Klick me. For APN I use web.vodafone.de, username and password are "";. Since then the connection to the WEB.

Upvotes: 2

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