Since version 1.8, small OLED displays with SSD1306 chips are supported. Connecting the display itself is quite trivial, since the display can be attached to the I2C bus.
Additionally, you need to add a push button to one of the digital ports of the Arduino. The port can be configured with the RAINSENSOR_PIN variable in config.h. The button should connect the digital port to +5V/+3.3V if it is closed. Additionally, add a 47k pull down resistor connecting the port to GND.
TSA-120 + FSQ-85 + ONTC 10"F4 Newton (+ epsilon-160 on Japan trip) | Avalon Linear + M-zero | ASI 1600mm pro + 6200mm pro | KStars/INDI on Raspberry Pi 4/Intel NUC
Ok I will check in my box what I have. I would build a "big version" with all including wind direction and speed and other "small" versions with screen and basically SQM sensor provided by the TSL237. In my previous test TSL2591 does not provide much precision
I have this for the luminance sensor. I'm working on some code to control this at the moment. Here's an image - on the left is the TLS2591 with a 15 degree lens and an acrylic dome and the dew heater ring, right is the rain resistance sensor, and bottom right is the MLX cloud sensor.