Did fresh OS install anyway, and then ran your MM install script. Pasted my updated config file that we worked over into the new install and weather is working great. Now back to MMM-Flights.
So, the final analysis for anyone reading this is to use the @sdetweil Magic Mirror install script, then edit the config.js
The only config options for openweathermap that I used were:
- Location
- LocationID
- apiKey (used a free one from openweathermap.org)
I did not have to use lat/lon or any other config options for it to work.