Help with alexa home node to automate diy spa bath heater with sonoff th16 temperature controlled relay

Ok with node-red-contrib-amazon-echo or node-red-contrib-virtual-smarthome, you could simply say "alexa set water temp to 25" screen shot below device is set as a dimmer. In screenshot you can see the percentage. i said "set water temp to 30" as well.

Also in node-red-contrib-alexa-remote2, you can use the event listener set to device activity. Then when you say "alexa blah blah", you can see the spoken word in msg.payload.description.summary. You would then have to parse out the temp.