Hello everyone, I wanted to share my experience with the Shelly Plus 1 PM devices and how they’ve transformed my energy management setup at a camping site. 
Initially, I installed four Shelly Plus 1 PM units to monitor and control power consumption through outdoor sockets. The goal was to fairly bill guests based on their actual usage. However, I encountered an unexpected challenge when I noticed that the newer generation of Shelly Plus 1 PM has a narrower temperature range (0 to +40°C) compared to the older model (-40 to +40°C). This was concerning since the camping area can experience colder temperatures, especially during winter months. 
After some research and reaching out to the community, I discovered that the temperature specification might have been a typo in the product description. This was a relief, as it meant I could proceed with the newer model without worrying about reliability issues. I also explored alternative solutions and found that integrating these devices with OpenHAB provided a robust multi-protocol gateway setup, allowing me to manage various HomeMatic and InterTechno devices seamlessly. 
One of the most rewarding aspects of this project has been the ability to create a customized automation system. For instance, I set up a rule where the heating system automatically turns on when the temperature drops below 21°C and turns off once it reaches 21°C. This not only ensures comfort for guests but also optimizes energy usage. 
I’d like to thank the community for their invaluable support and insights. If anyone is considering a similar setup or has questions about integrating different devices, feel free to reach out! 
Happy tinkering! 