So what you must do is supply a username and password. So, "user" is the username and the password is your ThingSpeak MQTT API Key. The MQTT API Key is listed on your ThingSpeak Account > My Profile page.
I think you're almost correct and on ...READ MORE
Use IP address instead of http://iotdevice.local..Use http ...READ MORE
Even if it's not a programming question ...READ MORE
Here is an explanation that best fits ...READ MORE
Ok so you need two libraries to ...READ MORE
In the dir mosquitto-1.4.X edit the ...READ MORE
Based on your requirement of a light ...READ MORE
It's not entirely clear what you're asking ...READ MORE
Not fully sure if you are wanting ...READ MORE
I don't think the MQ135 can do ...READ MORE
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