Communication

The device log already says connected, but the application traffic still does not work. The problem is usually not one “connected” state. It is that 802.11 access, security setup, DHCP, DNS, and application connectivity have all been mixed into one step.

Treating “saw the AP,” “associated,” “keys installed,” “got an IP,” and “the service works” as the same state is one of the most common mistakes in Wi-Fi access. For embedded implementation, packet analysis, and debugging, these states have different observation points. If they are mixed together, the logs lose their diagnostic value.