[WIFI] Fix mDNS startup for log levels below LOG_LEVEL_INFO

[3cky]

It seems #959 is almost here (still not enabled though), except small bug that prevents mDNS startup when log level is below LOG_LEVEL_INFO. This PR fixes this behaviour and also adds HTTP service to mDNS-SD registry.

[TD-er]

Can anyone test this?
Do you have some idea already of how much the compiled image will grow with mDNS enabled?

It would be a great addition but since I'm also struggling for 1MB builds to get them 2-step OTA again, it would be nice to know if the define to enable this should be 'common' or only on builds for larger flash chips.

[3cky]

Hi @TD-er,

I have checked patched mega-20181029 and it worked well, but now I applied patch to mega-20181031 and it doesn't work. :( I'm observing wdt reset just after AP connection is established.

INIT : Booting version:  (ESP82xx Core 2_4_2, NONOS SDK 2.2.1(cfd48f3), LWIP: 2.0.3)
110 : INIT : Warm boot #45 - Restart Reason: Hardware Watchdog
112 : FS   : Mounting...
137 : FS   : Mount successful, used 75802 bytes of 957314
515 : CRC  : program checksum       ...OK
526 : CRC  : SecuritySettings CRC   ...OK 
527 : CRC  : binary has changed since last save of Settings
634 : INIT : Free RAM:25104
635 : INIT : I2C
635 : INIT : SPI not enabled
651 : INFO : Plugins: 75 [Normal] [Testing] [Development] (ESP82xx Core 2_4_2, NONOS SDK 2.2.1(cfd48f3), LWIP: 2.0.3)
653 : WIFI : Set WiFi to STA
685 : WIFI : Connecting MyAP attempt #0
2020 : WD   : Uptime 0 ConnectFailures 0 FreeMem 22992
4455 : WIFI : Connected! AP: MyAP (...) Ch: 6 Duration: 3768 ms

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset

I'll investigate it further.

[uzi18]

try to run task clean and rebuild one more time

[3cky]

Tried clean/build, and it didn't help. But it looks like wdt resets are gone after I reverted back change from lwip (PIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH) to lwip2 (PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH) introduced in e3591ac.

[3cky]

Probably could be related to esp8266/Arduino#4028, but it seem it should be already fixed in esp8266/Arduino#4105.

[TD-er]

@3cky It is still before my first coffee of today, so it may be more obvious ;)

Just to be sure, your problem was fixed when changing back from LWIP2/HB to LWIP1.4/HB?
Could you also check if LWIP2/low memory?

[3cky]

@TD-er exactly :) LWIP2/HB doesn't work, but LWIP1.4/HB works. I tried also LWIP2/low memory, it doesn't work either.

[3cky]

Just tried to replace ESP8266mDNS library bundled with 2.4.2 by its previous versions. It seem last version of ESP8266mDNS library working with ESPEasy when LWIP2 is enabled is one bundled with 2.3.0, while 2.4.0 and later versions are crashing.

[TD-er]

Is there any update on this?
There should be somebody running mDNS on 2.4.x out there I guess.

[3cky]

Hi @TD-er,

Sorry for the delay, still can't figure out why mDNS isn't working with 2.4.x for ESPEasy. I tried to build latest Sonoff-Tasmota (which also uses mDNS) with 2.4.2 and it seem to work fine. :(

So I'm closing this PR for now and will open the new PR when this issue will be resolved.

[uzi18]

related to #2048 ??
it will not start if loglevel < INFO

[TD-er]

No is not related to that issue, but indeed looks like a bug to me.