Hey everyone! I wanted to share my recent success with integrating an Arduino Uno and an ESP-01S module into my Home Assistant setup using ESPHome. It’s been a fantastic journey, and I hope this post can help others who might be tackling a similar project.I’ve been working on a DIY project to monitor the voltage of my LiFePO4 battery, which powers a generator autostart system. The goal was to have real-time voltage readings displayed on my Home Assistant dashboard. Initially, I faced a bit of a hurdle because, despite seeing the sensor data in the ESPHome logs, the sensor entity wasn’t showing up in Home Assistant. This was a bit perplexing, but after some troubleshooting, I figured out the issue.The problem turned out to be with the ESPHome configuration. I had to ensure that the UART settings were correctly configured to read the data from the Arduino. Once I adjusted the configuration, everything fell into place. Now, I have a fully functional voltage sensor that updates in real-time on my dashboard. It’s incredibly satisfying to see all the pieces come together!For those who might be working on a similar project, here are a few tips:- Double-check your UART settings in ESPHome to ensure they match your Arduino’s configuration.- Make sure your ESPHome firmware includes the necessary components for text sensors.- If you’re using custom lambdas, test them thoroughly to avoid any unexpected behavior.I’d love to hear from anyone who has undertaken a similar project or has questions about integrating Arduino with ESPHome. Let’s keep the community spirit alive and help each other out!Cheers to all the DIY enthusiasts out there! 