Particle.variable() with IP Address

Troubleshooting
1

Hello Particle Community!

I’m trying to bind a device’s IP address to a variable in the cloud, but the resulting value ends up weird.
Here’s my code:

void setup()
{
    char ipString[16];
    server.begin();
    IPAddress ip = WiFi.localIP();
    sprintf(ipString, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
    Particle.variable("ipAddress", ipString);
}

And here’s the data I get back from the API call:

{“cmd”:“VarReturn”,“name”:“ipAddress”,“result”:“�(\n\b”, …}

I’m not very acquainted with C so I’m not sure what’s going on. Any help would be greatly appreciated!
By the way, publishing ipString as an event works out fine and is completely readable but I want to be able to access the address as a variable instead of having to subscribe to an event stream.

Thanks =)

2

Your exposed base variable (ipString[]) needs to be global.

3 Likes
3

Thanks so much @ScruffR!

1 Like
4

Thanks for the help!