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    Quectel BC66, UDP, T-Mobile SIM in Germany: DNS parse failed

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    nb-iot connection quectel netherlands roaming at command
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    • Roalnd Baldin
      Roalnd Baldin Deutsche Telekom IoT last edited by Aleksandra Klinkner

      Hi,

      unfortunatelly I can not connect to UDP server of T-Mobile Netherlands 😞

      In the following the key infos about my scenario:

      • I am using the Quectel BC66-TE-B development kit
      • I am working with a IoT sim card from T-Mobile Netherland in Germany.
      • The roaming for Germany is activated for the sim card.
      • The APN is set to: cdp.iot.t-mobile.nl
      • The device get assigned the IP address : 10.0.0.191
      • The command: AT+QIOPEN=1,0,“UDP”, “172.27.131.100”,15683,1001,1,1
      • As the result I got the error response: +QIOPEN: 1,565
      • The code 565 means: DNS parse failed

      I tryed to execute AT+QIOPEN for IPv4 and IPv6. In both cases I got the same problem.

      Actually I think that the IP 10.0.0.191 looks very very strange.

      I can setup the IP address of the DNS server explicity. Does anyone know it??

      Many thanks for your help!

      Regards, Roland

      1 Reply Last reply Reply Quote 0
      • Roalnd Baldin
        Roalnd Baldin Deutsche Telekom IoT last edited by

        … Now I got a diffrent IP 10.128.1.149. Still the same problem 😞

        1 Reply Last reply Reply Quote 0
        • S
          Stefan de Lange last edited by

          Hi, can you give us the full sequence of commands you use? That will help us find what is wrong.

          1 Reply Last reply Reply Quote 1
          • Roalnd Baldin
            Roalnd Baldin Deutsche Telekom IoT last edited by

            Deactivate auto sleep mode

            AT+QSCLK=0

            Persistent setup

            Set the band to band 8 (900 MHz) for Deutsche Telekom NB-IoT

            AT+QBAND=1,8

            Turn off the radio.

            AT+CFUN=0

            Set the APN

            AT*MCGDEFCONT="IP","cdp.iot.t-mobile.nl"

            Restart the module as some configurations only take place after a reboot.

            AT+QRST=1

            After reboot automatic dial-in to the network

            F1: 0000 0000
V0: 0000 0000 [0001]
00: 0006 000C
01: 0000 0000
U0: 0000 0001 [0000]
T0: 0000 00B4
Leaving the BROM

AT+QSCLK=0
OK

+IP: 10.128.1.137

            Open UDP socket and send message

            Open the UDP socket to server

            AT+QIOPEN=1,1,"UDP", "172.27.131.100",15683,1001,0,0
OK

+QIOPEN: 1,565

            Get the last error with description

            AT+QIGETERROR
+QIGETERROR: 565,dns parse failed

OK

            The return from AT+QIOPEN should be +QIOPEN: 1,0

            Many many thanks for your help!

            Regards, Roland

            S 1 Reply Last reply Reply Quote 0
            • S
              Stefan de Lange @Roalnd Baldin last edited by

              Hi, I am trying to reproduce this but my BC66 modem doesn’t even recognize the +QIOPEN command. So I am updating the FW first.

              @Roalnd-Baldin said in Quectel BC66, UDP, T-Mobile SIM in Germany: DNS parse failed:

              AT+QIOPEN=1,1,"UDP", "172.27.131.100",15683,1001,0,0
OK

+QIOPEN: 1,565

              I notice you have a whitespace between ‘,’ and “172.27.131.100”. I can’t verify but I know some modems don’t like this and will fail.

              1 Reply Last reply Reply Quote 1
              • Roalnd Baldin
                Roalnd Baldin Deutsche Telekom IoT last edited by

                Hi Stefan,

                you are a cool guy!! This solved the problem. It was the whitespace.

                Many many thanks for your support!!

                Regards, Roland

                1 Reply Last reply Reply Quote 2
                • Roalnd Baldin
                  Roalnd Baldin Deutsche Telekom IoT last edited by

                  Hi Stefan,

                  again many thanks. It works now. I can send data to my App. The following sequence works for Quectel BC66:

                  Deactivate auto sleep mode

                  AT+QSCLK=0

                  Persistent network and APN setup

                  AT+QBAND=1,8
AT+CFUN=0
AT*MCGDEFCONT="IP","cdp.iot.t-mobile.nl"

                  Restart the module as some configurations only take place after a reboot.

                  AT+QRST=1

                  After reboot wakup from sleep, deactivate auto sleep mode again and wait for network connect

                  AT+QSCLK=0

+IP: 10.128.0.134

                  Create a UDP socket and for UDP server

                  AT+QIOPEN=1,1,"UDP","172.27.131.100",15683,1001,0,0

                  Send message “Hello World”

                  AT+QISEND=1,11,48656c6c6f20576f726c64
                  S 1 Reply Last reply Reply Quote 2
                  • S
                    Stefan de Lange @Roalnd Baldin last edited by

                    @Roalnd-Baldin Cool! Nice to see it works now.

                    1 Reply Last reply Reply Quote 0
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