HL7692 in LTE mode does not connect with HTTP server


#1

Hello,

im am trying to exchange data with an HTTP server. If I use a SIM, where only GPRS connection is allowed,
the modem connects properly and the data transfer runs without any problem. But with a SIM, which supports LTE, the modem does not connect to the server (see log below).

Very interesting is the error message near the end of log …

// Test HL7692
// … -> Some multiple lines removed

AT

  • Time out +

AT

  • Time out +

AT
< AT
OK

ATE0
< ATE0
OK

ATI
< HL7692

OK

AT+CMEE=1
< OK

< OK

+SIM: 1

AT+CFUN=1
< OK

AT+CPAS
< +CPAS: 1

OK

AT+CPAS
< +CPAS: 1

OK

AT+KSLEEP=2
< OK

AT+CPIN?
< +CPIN: SIM PIN

OK

  • Time out +

AT+CPIN=“0414”
< OK

AT+CSQ
< +CSQ: 99,99

OK

< +CSQ: 99,99

OK

AT+CSQ
< +CSQ: 9,2

OK

< +CSQ: 9,2

OK

AT+GMR
< BHL769x.2.16.170400.201702221601.x7120m_1

OK

AT+KBND?
< +KBND: 01000000 // Connected via LTE …

OK

AT+COPS=0
< OK

AT+CREG?
< +CREG: 0,1

OK

AT+CNMI=2,0,0,0,1
< OK

AT+CEREG?
< +CEREG: 0,1 // Registration successful

OK

AT+KCNXCFG=1,“GPRS”,“internet.telekom”,“t-mobile”,“tm”,“IPV4”,“0.0.0.0”,“0.0.0.0”,“0.0.0.0”
< OK

// Try it 4 times with 5s pause

AT+KCNXTIMER=1,5,4,60,1
< OK

AT+KIPOPT=0,“HTTP”,1,1460
< OK

AT+KCNXPROFILE=1
< OK

AT+CGATT=1
< OK

// Check signal …

AT+CSQ
< +CSQ: 9,2

OK

< +CSQ: 9,2

OK

// Login to HTTP server without user / password

AT+KHTTPCFG=1,“http://www.myserver.net”,80,0,"",""
< +KHTTPCFG: 1

OK

// Wait for connect …

+KCNX_IND: 1,4,1

+KCNX_IND: 1,2,1,4,5

< +KHTTPCFG: 1

OK

+KCNX_IND: 1,4,1

+KCNX_IND: 1,2,1,4,5

+KCNX_IND: 1,4,2

+KCNX_IND: 1,2,2,4,5

+KCNX_IND: 1,4,3

+KCNX_IND: 1,2,3,4,5

+KCNX_IND: 1,4,4

+KCNX_IND: 1,2,4,4,5

// No connection, but this:
+KHTTP_ERROR: 1,5 <<< Meaning: “HTTP connection error due to internal trouble” :question:

// Close (unopened) connection …

AT+KHTTPCLOSE=1
< +CME ERROR: 922 // error cause: unconnected

AT+KHTTPDEL=1
< OK

//— End of log ----

Any idea ?

Regards,

Moardy


#2

Hello,
Please test on FW2.17 or above and if still issue doesnt resolve then this problem needs a detailed technical analysis. Please contact your Technical support in SWI to provide you the solution.

Thanks & Regards,
Moderator


#3

Hello,

I have made a test with FW2.18 but the result is the same: HTTP_ERROR 1,5 :cry:

Regards,

Moardy