@JohnGalt
Hi,
you will need to change line 108 in MMM-DynamicWeather.js and line 130 in MMM-DynamicWeather.ts.
Both show this at the moment:
this.url = "https://api.openweathermap.org/data/2.5/weather?appid=" + this.config.api_key;
And you will need to change it to:
this.url = "https://api.openweathermap.org/data/3.0/onecall?appid=" + this.config.api_key;
But no guarantee this will work.