Quectel BC66, UDP, T-Mobile SIM in Germany: DNS parse failed
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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
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… Now I got a diffrent IP 10.128.1.149. Still the same problem :(
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Hi, can you give us the full sequence of commands you use? That will help us find what is wrong.
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Deactivate auto sleep mode
AT+QSCLK=0Persistent setup
Set the band to band 8 (900 MHz) for Deutsche Telekom NB-IoT
AT+QBAND=1,8Turn off the radio.
AT+CFUN=0Set the APN
AT*MCGDEFCONT="IP","cdp.iot.t-mobile.nl"Restart the module as some configurations only take place after a reboot.
AT+QRST=1After 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: 10.128.1.137Open 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: 1,565Get the last error with description
AT+QIGETERROR +QIGETERROR: 565,dns parse failed OKThe return from AT+QIOPEN should be +QIOPEN: 1,0
Many many thanks for your help!
Regards, Roland
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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: 1,565I 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.
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Hi Stefan,
you are a cool guy!! This solved the problem. It was the whitespace.
Many many thanks for your support!!
Regards, Roland
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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=0Persistent 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=1After reboot wakup from sleep, deactivate auto sleep mode again and wait for network connect
AT+QSCLK=0 +IP: 10.128.0.134Create a UDP socket and for UDP server
AT+QIOPEN=1,1,"UDP","172.27.131.100",15683,1001,0,0Send message “Hello World”
AT+QISEND=1,11,48656c6c6f20576f726c64 -
@Roalnd-Baldin Cool! Nice to see it works now.
