AT+QIDNSCFG primary and secondary DNS address

MagnusE · January 21, 2026, 1:10pm

What is the behavior of the primary and secondary DNS addresses?
Is the secondary DNS used automatically if the primary DNS fails?

herbert.pan-Q · January 22, 2026, 5:23am

Yes, your understanding is correct.

MagnusE · January 22, 2026, 8:32am

Thank you. How is a “failure” defined in this context?
For example, does the module switch to the secondary DNS after a timeout, or also if the primary DNS responds with an error?

herbert.pan-Q · January 23, 2026, 3:19am

If the primary DNS resolution fails, an error code will also be returned, and then it will automatically switch to the secondary DNS to attempt the resolution.