-3009 (DNS Failed), any idea how to debug?

ARMmbed / wifi-ism43362

ISM43362 WiFi driver

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-3009 (DNS Failed), any idea how to debug? #74

Closed janjongboom closed 3 years ago

janjongboom commented 4 years ago

Hi @jeromecoutant, one of our users is using this WiFi radio on the ST B-L475E-IOT01A but sees all requests fail with a -3009 error. Looking at the NSAPI error table in Mbed OS that seems like a DNS error, so I'm suspecting a firewall issue somewhere. Do we have any good idea on how we could debug this properly for this chip?

Some info:

https://forum.edgeimpulse.com/t/uploading-finishes-but-no-data-collected/303/7

jeromecoutant commented 4 years ago

@JeanMarcR Could you have a look ? Thx

JeanMarcR commented 4 years ago

Yes, I am looking at.

JeanMarcR commented 4 years ago

Hi all,

You could try the following steps :

Removing the gethostbyname() or getb hostbyname_async() from your code,
Using the IP address of the server (you would like to connect),
Checking your application. If the problem is due to DNS server, your application must run correctly. Maybe there is a firewall issue. So, to enable communication with the DNS server, firewall must authorize UDP and TCP connections on port 53.

Best regards

jeromecoutant commented 4 years ago

Hi @janjongboom Could you try #78 ? Thx

jeromecoutant commented 4 years ago

Any update ? Thx

janjongboom commented 4 years ago

@jeromecoutant Sorry, GH notifications overload. I can't test this for the user on an unlanded PR. I'll update the WiFi driver for the firmware once it lands (hard to test I know!).