WiFi Hostname is only set when changing mode to WIFI_MODE_STA

[tbnobody]

Board

generic

Device Description

Hardware Configuration

No

Version

v2.0.4

IDE Name

VSCode with PlatformIO

Operating System

Windows 11

Flash frequency

PSRAM enabled

no

Upload speed

115200

Description

There are several issues in issue trackers out there in the internet which are stating that the hostname is not set correctly. When diving deeper into the library, it seems that the hostname is only set on one location:

arduino-esp32/libraries/WiFi/src/WiFiGeneric.cpp

Line 1122 in 77065bf

err = set_esp_interface_hostname(ESP_IF_WIFI_STA, get_esp_netif_hostname());

That means set a call of WiFi.setHostname() does nothing in the first step. It's not even enough to call WiFi.mode(WIFI_MODE_STA); if the mode was already WIFI_MODE_STA. Because if current mode equals new mode:

arduino-esp32/libraries/WiFi/src/WiFiGeneric.cpp

Line 1109 in 77065bf

if(cm == m) {

no changes are applied.

To set the hostname correctly the following snippet has to be used:

WiFi.mode(WIFI_MODE_APSTA); // or any other mode
WiFi.setHostname("asdf");
WiFi.mode(WIFI_MODE_STA);

If the behavior is known to the user of the class it's simple to use but it's a little bit unintuitive. Does it make sense to at least document this behavior?

Sketch

-

Debug Message

-

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[domdfcoding]

I've run into the same issue of the hostname being set, with internet unhelpfully guides suggesting to do it they way I was already.
I've tried the approach listed here (with the exception of WIFI_STA instead of WIFI_MODE_STA, not sure what the difference is) and it works as I would expect.

Could this be fixed, or at least the limitation documented, please?

I'm running on an ESP32-C3, if it's relevant.

[pedrominatel]

Hi, @domdfcoding,

This will be added to the documentation. On the code side, I'll discuss with the team if there is something to do.

[Parsaabasi]

Hello,

Due to the overwhelming volume of issues currently being addressed, we have decided to close the previously received tickets. If you still require assistance or if the issue persists, please don't hesitate to reopen the ticket.

Thanks.