ESP32 CO2 Sensor for Homeassistant

This is a simple ESP32-based CO2 sensor for Homeassistant that I initially started developing as a x-mas present for my dad. I wanted to have accurate CO2 readings, since BME sensors approximate CO2 via VOC and other commercial weather stations in my experience gave inaccurate readings. So I used an SCD41 Sensor module. This esphome project contains 3d printed parts, a custom PCB, some electronic components and some code. The RGB LED on the ESP module indicates by color, how good the air quality is and how soon you should vent the room. The transitions are Green → Yellow → Red → Purple → Blue → White. The small holes in the lid are to access the boot and reset buttons. The project also has 2 different packages: Wired and (partially) standalone capable. Wired should be self-explaining, it needs to be powered by a USB C cable. The standalone package is designed to be powered by a 3.7V LiPo battery, however there are still bugs which I was not able to fix yet (more on that later). This ve