How can I use Xively MQTT server with Arduino?

Question

I'm trying to connect my Arduino with ethernet to Xively using their MQTT server but am having trouble authenticating. When I do client.connect("arduinoMQTT") I get a failure. I tried passing my API Key as a username by doing client.connect("arduinoMQTT", "APIKEY") but then the code won't compile.

How can I authenticate to the Xively MQTT server on arduino.

knolleary · Accepted Answer · 2013-07-01 16:27:16Z

6

If you check the api docs for the Arduino MQTT client, you'll see you need to provide a password argument as well as the username. When connecting to Xively, you use your api key as username and null for the password:

client.connect("arduinoMQTT", "APIKEY",null)

You should probably use something a bit more unique than arduinoMQTT as the client id as well.

answered Jul 1, 2013 at 16:27

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knolleary

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knolleary Over a year ago

Oops... Didn't mean to create this as a CW. Oh well

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