Recently, I embarked on an exciting project to create a parking sensor using an RGB LED as an indicator for proximity to the ‘ideal’ parking distance. The goal was to store this distance as a global variable in the ESPHome code upon a long button press. However, I encountered a challenge when the device restarted, as the custom distance wasn’t retained between reboots. This was a significant hurdle, as I didn’t want to hardcode the right distance into the system.After some research and experimentation, I realized that pulling the distance value from an input_boolean within Home Assistant could be a viable solution. This way, even if the parking sensor rebooted, Home Assistant would retain the active value for the parking sensor. However, I faced another issue: converting the platform: homeassistant sensor value, which comes in as a string, to a float value. This was essential for the sensor to function correctly.I tried several methods, including using C++ code to convert the string to a float, but encountered errors such as ‘stof’ not being a member of ‘std’. After some troubleshooting and adjusting the code logic, I managed to resolve the issue by ensuring the correct inclusion of necessary headers and libraries. This allowed me to successfully convert the string value to a float, enabling the sensor to retain the custom distance between reboots.Reflecting on this experience, I learned the importance of thorough research and persistent problem-solving when working with smart home technologies. It also highlighted the value of community support and the wealth of knowledge available in forums like this one. I’m now confident in my ability to integrate ESPHome sensors with Home Assistant, opening up new possibilities for home automation projects.This journey has been both challenging and rewarding, and I’m excited to explore further enhancements to my parking sensor system. I hope my experience can inspire others to tackle similar projects and overcome technical hurdles with creativity and determination.