To work around a problem I have I have decided I shall send the IP address back to the MQTT broker and deal with it another way.
The bit of code I have is this:
Serial.println(WiFi.localIP());
Serial.println("=================");
client.publish(idTopic, ...........);
And that is where I fall over.
I can't put localIP() in there as it is (for instance) 192.168.1.7 and that isn't liked by the client.publish( ) part.
How can I "format" the localIP() so it will be accepted in the line?
Found the answer/ a way of doing it.
This is how.
snprintf(ip_addr, 60, "{\"WIFI-DEVICE\":\"GPS SENSOR\",\"IP Address\":\"%ld.%ld.%ld.%ld\"}" , ip[0], ip[1], ip[2], ip[3]);