Socket Example

This example now acts as both a usage demo and a lightweight regression test for the socket component. It runs a sequence of UDP and TCP scenarios and prints a pass/fail summary at the end.

The covered scenarios include:

• UDP unicast client/server messaging with scope-based teardown

• UDP request/response with a larger payload

• UDP multicast request/response

• UDP response timeout when no server is listening

• UDP blocked-receive teardown

• TCP unicast client/server messaging with scope-based teardown

• TCP request/response followed by reconnect

• TCP blocked-accept teardown

• TCP connect failure to an unused port

At startup the example creates a small open Wi-Fi AP so the network stack is initialized, but the actual test traffic stays local to the device using loopback (127.0.0.1) and a local multicast group (239.1.1.1). No second device or external server is required.

How to use example

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

The serial log shows each scenario as it starts, a per-scenario pass/fail line, and a final summary such as Socket example summary: 9/9 scenarios passed.