I think you need to use " instead of ', see http://www.espruino.com/Modules
Thanks.@Spocki I'm thinking of using MQTT from there because the PubNub seems to be 85KB minified size.
@Spocki started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I think you need to use " instead of ', see http://www.espruino.com/Modules