This is a simple project for a meteorological station with the ObservinConditions ASCOM driver for communication with NINA, AllSkyEye, etc.
You can store the data in the fits headers.

https://github.com/rotura/ArduinoMeteo/tree/main

The actual arduino code works with the following sensor:

• I2C:
  • TSL2591: Luxometer for SQM reading
  • MLX90614: Infrared sky temperature for clouds
• SPI:
  • BMP280: Ground temperature and pressure
    • MISO: Pin 12
    • MOSI: Pin 11
    • SCK: Pin 13
    • CS: Pin 10
• Digital:
  • DHT22: Humidity (Pin 5). 10KΩ resistor between the Data pin and the VCC pin.

I also made a simple PCB. It has free I2C and digital ports for future upgrades (wind velocity sensor, rain sensor, etc).
C1: 100nF ceramic condenser.
R1: 10KΩ resistor.I used JST connectors for all the sensors. ON/OFF switch can be bypassed soldering the left and middle pin.Known problems:

• I2C_1 can't be used. The USB of the Arduino UNO block it.
• Tracks should not have right angles.