mDNS lookup on esp32

[rk125]

Hello Maarten!

Old problem with mDNS on ESP32. If use "loraserver.local" as ttnserver on ESP8266 - all good, works, but not on ESP32, dies cause cannot resolve hostname. You might not see issue if using public servers, those work always, but mDNS causes problem. On setup where there is no DNS server mDNS is very useful. Would you consider something like this in the code (better code up to you :), please? I added it into _utils for myself. Seems to be working for both esp8266 and esp32 (ttgo) boards I have.

IPAddress resolveHost(char * svr) { IPAddress svrIP; String svrName = String(svr); Serial.print("Server "); Serial.println(svrName); if (svrName.endsWith(".local")) {

if ESP32_ARCH==1

svrName=svrName.substring(0,svrName.length()-6);
svrIP = MDNS.queryHost(svrName);
for (byte i=0; i<5; i++) {
  svrIP = MDNS.queryHost(svrName);
  if (svrIP.toString() != "0.0.0.0") break;
  Serial.println("ReTrying to resolve mDNS");
  delay(1000);
}

else

if (!WiFi.hostByName(svr, svrIP))      // Use DNS to get server IP once
{
  die("Setup:: ERROR hostByName");
};

endif

} else { if (!WiFi.hostByName(svr, svrIP)) // Use DNS to get server IP once { die("Setup:: ERROR hostByName"); }; } return svrIP; }

Call it for all 3 servers, ntp, ttn and thingserver, cause for me ntp is also .local on server. From setup: ttnServer=resolveHost(_TTNSERVER);

Thanks! Reggie

[strech345]

@rk125 many thanks. Now it works also for me :-)

[rk125]

Yeee! Glad to hear! Reggie

[platenspeler]

I will have a look. I/m busy with 6.1.5 also, so looking whether I can squeeze it in.

Maarten

[platenspeler]

Added the code to 6,1,5 together with some slight mods