@aha_1980 said in UDP Socket - writeDatagram uses IPv6 and not IPv4: Then why not use QHostAddress::AnyIPv4 ? Looks more clear to me... Learn something new everyday :)

@ambershark Thank you very much for your help, now it's working, it seems like I was passing the IP argument incorrectly, now I know that I have to send this parameter inside a QT function. thanks!