IP address by programm

[simonik]

I use android phone and hotspot to connect TTGO. How can I find out IP address in "MIT app invertor" that is allocated by phone ?
Now I have to write it by hand.
For example, how does the rdzsonde application find out?

Thanks

[LukePrior]

mDNS

Default: http://rdzsonde.local/

[dl9rdz]

Exactly, the TTGO makes mDNS announcements.

The app on android uses the NsdManager (https://developer.android.com/reference/android/net/nsd/NsdManager) to discover the IP address, see code in https://github.com/dl9rdz/rdzwx-plugin/blob/main/src/android/rdzwx-a.kt

I don't know if MIT app inventor has support for mDNS discovery (seems not to be the case I guess), but probably you could implement this in a custom extension.
[removed the duplicate post in the welcome announcement]

[simonik]

mDNS

Default: http://rdzsonde.local/

Thanks. But it is not work on android. Only PC.

[simonik]

I have to add on the start loop code (udpAddree = 255.255.255.255,udpPort 3333) :
void loop() {
//moje
if(connected2){
//Send a packet

int now = millis();
if (lastUDPtime + 600 < now){
Serial.println("Posilam UDP");
udp.beginPacket(udpAddress,udpPort);
//udp.printf("Seconds since boot: %lu", WiFi.localIP());
udp.println(WiFi.localIP());
udp.endPacket();
lastUDPtime=millis();
}
}
//konec moje