Tcp connection

1

Hi All,
I am trying to create a tcp connection via HL7800 and need some help . I am Using the latest version 4.4.6.0 and getting a Error 921
The connection is client to server Tcp.
AT Command were taken from AIR-Prime HL78XX data sheet 14.5. How to Use TCP Commands
14.5.1. Client Mode.

AT COMMANDS:
AT&K3
AT+KCNXCFG=1,“GPRS”,“APN”,“log”,“Password”,“IPV4”,“0.0.0.0”,“0.0.0.0”,“0.0.0.0”
AT+KTCPCFG=1,0,“IP”,PORT"
AT+KTCPCNX=1
+CME ERROR: 921

Thanks

2

@yossi.a,

Can you send the following commands before the others?

at+creg?
at+cereg?

These need to indicate you are attached to the network.

Regards

Matt

3

AT
OK

AT+CMEE=1
OK

AT+CGMR
HL7800.4.4.6.0
OK

AT+COPS?
+COPS: 0,0,“OPERATOR”,7
OK

AT+CREG=1
OK

AT+CEREG=1
OK

AT+CGPADDR=1
+CGPADDR: 1,“IP”
OK

AT+CSQ
+CSQ: 20,99
OK

Maybe this is the problem +CSQ: 20,99 ?

4

@yossi.a

No the CSQ is not the issue, 20 is fine for making a connection. I presume you have modified the above CGPADDR response to “IP” where there was actually an IP address in there?

With the at+kcnxcfg command can you lave a number of the fields at the end blank so for EE in the UK

at+kcnxcfg=1,“GPRS”,“everywhere”

Miss everything else off as it might be configuring something the network does not like and leaving it blank will allow the network to do something it wants to do.

Regards

Matt