When the main solarcene.community server is offline a custom 50x html error page is served by the gateway NanoPi so that a visitor doesn't just get an error page. The custom page is generated by the solar monitoring script (`solar_monitor.py`) and is written every 10 minutes. The page itself contains some general stats and a bit of information to explain the situation.
In the `solar_monitor.py` script the `write_html()` function grabs the latest solar data (from the vedirect serial connection to the Victron SmartSolar MPPT Charger) which are stored in the redis database. It then simply overwrites the custom file with hardcoded html. I've got a scheduler that just runs this job every 10 minutes.
## Installation
* Install the requirements for the `solar_monitor.py` script (redis, vedirect, apscheduler), recommended to be put in `venv` environment.
* Add the code from `nginx.setup` to your nginx file
* Setup `solar_monitor.py` to run, I use a systemd setup (see solar_monitor.service)
