Hello everybody!
I’m not sure this is the place to post this, and I am sorry if I chose the wrong category, however I wanted to share with you something I’ve made.
It’s a environment and plant monitoring sensor that’s plug-and-play compatible with Homeassistant. It measures parameters such as: soil moisture (capacitively), soil temperature, air temperature. air moisture, air relative humidity and illuminance.
It transmits data via Bluetooth Low Energy or via USB-C and can last on a small CR2032 battery for up to 1 year.
Other notable features:
- the soil probe is replaceable
- it just appears in the Homeassistant integrations page, as data is transmitted in the BTHome data format
- the sensor’s firmware can be upgraded
- the sensor configurable and the soil probe can be calibrated for different soil types
- it comes with a 3D printed case with magnet for easy mounting to magnetic surfaces
- can also be used without soil probe as a simple Temperature, Humidity and Illuminance sensor
- can also be used while plugged in if you don’t want to deal with batteries
Here’s a picture of it (I would upload more pictures, but I am limited to a single picture since I am a new user on this forum):
If what I said sparked your interest, please check out the website, which contains more information: https://sensus.klausen.tech/
I would love to hear your feedback and would love for you to try it out 
Thank you and I wish you all a nice day!
Calin