Short code to interpret commands and parse it to sense hat

watson-sense-hat.js

// screen on command to turn on the entire display to Red. Otherwise it stays green.
// Extend the function to interpret more commands as required.
// Sense hat commands are described in the info for sense hat node.

if (msg.payload === 'screen on'){
    msg.payload = '*,*,red';
}
else{
    msg.payload = '*,*,green';
}
return msg;