My Vote is for Acuparse - I have experimented with the more expensive Meteobridge (
https://www.meteobridge.com/wiki/index.php/Home) which worked well but did run into some hiccups due to the limited router processing power also for the updates there is a cost. Unfortunately with the recent SmartHub changes Meteobridge is no longer a solution as may date was no longer being published to WUnderground.
I have a few RaspberryPi's and have some Unix experience so when I found Acuparse i jumped in and while I did have an issue initializing the database once it was up and running. It has been rock solid. Instruction for the Pi can be found here. (
https://github.com/acuparse/acuparse/wiki/Installation-on-Raspberry-Pi)
Acuparse seems to be updating on a fairly regular steady schedule with a recent version 2.9 just last week.
Yes eventually I would like to dump my 5-1 setup for a more sophisticated setup but I found myself enjoying the tinkering to keep it alive.
My setup is a Acurite 5-1, separate Tower for Temp/Humidity, SmartHub, RaspberryPi 2 B+ with Acuparse 2.9, and a 8 GB SD Card.
I could see about uploading a Virgin Image almost ready to use but there would still need top be some tweaking for:
Individual Network (192.168.x.1; or 10.x.x.x)
WiFi Passwords
Database setup username and password.
I have mine setup on a special port number so I can view the settings from work, but the overall goal was just to keep the Wunderground data flowing.
Happy to help if I can.