The idea of this repo is to create a cloud function/webhook that controls Marantz source and sound settings for multiple zones. I am using it with IFTTT IOS shortcuts, that fires instructions to our webhook.
The receiver control is pinched from https://github.com/ntotten/marantz-avr with the addition of adding the ability to target Zones 2 and 3, and I also refactored it to use a bit more modern JS.
Add a file called "receiver-url.json" to the "functions" folder, that contains your Marantz IP and port (or URL):
{ "url": "123.456.789.890:58765" }
I am pushing this cloud function to firebase. Which is called from my IOS shortcut