TCP as server mode, Client can not connect to Server

Technical Subjects Software General Function
1

Hello All,

We are working on the EG95 GSM/GPRS module. We are facing some issue in TCP as a Server mode.

issue :

  1. After creating socket as server , Client cannot able to connect.
    By port checker we checked the IP with port but it shown port is closed.
    But AT+QISTATE shown the socket is in listening mode.

  2. TCP server create fail in transparent mode.

issue 1 Log :
[2020-09-23_12:29:22:822]
[2020-09-23_12:29:22:822]RDY

[2020-09-23_12:29:22:822]+QSIMSTAT: 1,1
[2020-09-23_12:29:22:931]
[2020-09-23_12:29:22:931]+CFUN: 1
[2020-09-23_12:29:23:931]
[2020-09-23_12:29:23:931]+CPIN: READY

[2020-09-23_12:29:23:931]+QUSIM: 0
[2020-09-23_12:29:27:902]
[2020-09-23_12:29:27:902]+QIND: SMS DONE
[2020-09-23_12:29:29:887]AT

[2020-09-23_12:29:29:887]OK
[2020-09-23_12:29:35:558]
[2020-09-23_12:29:35:558]+QIND: PB DONE
[2020-09-23_12:29:36:590]AT+GMI

[2020-09-23_12:29:36:590]Quectel

[2020-09-23_12:29:36:590]OK
[2020-09-23_12:29:41:668]AT+GMM

[2020-09-23_12:29:41:668]EG95

[2020-09-23_12:29:41:668]OK
[2020-09-23_12:29:47:809]AT+GMR

[2020-09-23_12:29:47:809]EG95EXGAR08A02M1G

[2020-09-23_12:29:47:809]OK
[2020-09-23_12:29:53:914]AT+GSN

[2020-09-23_12:29:53:914]864004040007970

[2020-09-23_12:29:53:914]OK
[2020-09-23_12:30:01:539]AT+CPIN?

[2020-09-23_12:30:01:539]+CPIN: READY

[2020-09-23_12:30:01:539]OK
[2020-09-23_12:30:09:325]AT+CREG=1

[2020-09-23_12:30:09:325]OK
[2020-09-23_12:30:14:075]AT+CREG?

[2020-09-23_12:30:14:075]+CREG: 1,1

[2020-09-23_12:30:14:075]OK
[2020-09-23_12:30:19:981]AT+CSQ

[2020-09-23_12:30:19:981]+CSQ: 21,99

[2020-09-23_12:30:19:981]OK
[2020-09-23_12:30:28:903]AT+QLTS=2

[2020-09-23_12:30:28:903]+QLTS: “2020/09/23,12:31:00+22,0”

[2020-09-23_12:30:28:903]OK
[2020-09-23_12:30:36:012]AT+CGREG=1

[2020-09-23_12:30:36:012]OK
[2020-09-23_12:30:41:358]AT+CGREG?

[2020-09-23_12:30:41:358]+CGREG: 1,1

[2020-09-23_12:30:41:358]OK
[2020-09-23_12:30:56:108]AT+QICSGP=2,1,“WWW”,"","",1

[2020-09-23_12:30:56:108]OK
[2020-09-23_12:31:03:670]AT+QICSGP=2

[2020-09-23_12:31:03:670]+QICSGP: 1,“WWW”,"","",1

[2020-09-23_12:31:03:670]OK
[2020-09-23_12:31:14:138]AT+QIACT=2

[2020-09-23_12:31:15:888]OK
[2020-09-23_12:31:21:982]AT+QIACT?

[2020-09-23_12:31:21:982]+QIACT: 2,1,1,“100.114.33.200”

[2020-09-23_12:31:21:982]OK
[2020-09-23_12:31:46:481]AT+QIOPEN=2,1,“TCP LISTENER”,“127.0.0.1”,0,2020,0

[2020-09-23_12:31:46:481]OK

[2020-09-23_12:31:46:481]+QIOPEN: 1,0
[2020-09-23_12:32:01:430]AT+QISTATE=0,2

[2020-09-23_12:32:01:446]+QISTATE: 1,“TCP LISTENER”,“100.114.33.200”,0,2020,3,2,1,0,“uart1”

Socket is in listening mode and waiting for client…

/***************************************************************************************************************/
Need your valuable support. I am not understand what is the issue.

Thanks,
Chintan

2

You should use static ip. Otherwise you can not access.

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