mdns not answer to linux mdns-scan

[miky2k]

----------------------------- Remove above -----------------------------

Basic Infos

Hardware

Hardware: generic
Core Version: 2.1.0

Description

mdns not answer to linux mdns-scan
mdns.begin is executed after receiving ip from dhcp in sta mode

addService return void so i don't know if it exit because does not addService
(but i suppose it can return error with minor changes).

mdns.update is located in loop.

Settings in IDE

Module: Generic ESP8266 Module
Flash Size: 4MB/3MB
CPU Frequency: 80Mhz
Flash Mode: qio
Flash Frequency: 40Mhz
Upload Using: SERIAL
Reset Method: ck

[me-no-dev]

mdns is global and asynchronous service.
the following is all you need to start it and add a service

void setup(){
  MDNS.begin(hostname);
  MDNS.addService("http","tcp",80);
}

If you are using ArduinoOTA, then you should know that MDNS is started by ArduinoOTA and you need to just add the service after you ArduinoOTA.begin()

[miky2k]

I'm not using arduino OTA, do you suggest to remove mdns.update() from loop ?

[igrr]

Yes, it's sufficient to do MDNS.begin and whatever MDNS.addService needed in your application.
Make sure you're not creating an instance of MDNS though (as in ESP8266mDNS mdns;).

[miky2k]

Ok, now work , but i have to wait dhcp for assigned ip.
What happen if i change ip (dhcp lease) of if i lost for a while AP signal (autoreconect enable) or if i use wifimulti ?
There is possibility to hook MDNS begin with wifievent to make ip change traking automatically?

mdns-scan not work but i see in wireshark answer and linux avahi give to browser correct ip-name resolution.

[igrr]

Re automatic (re-)start of mDNS, there is an open ticket: #1828.

[miky2k]

ok , i will wait for mdns improveent