Help with heating rain and snow sensor with rs485 output

[japko24]

Hello,
Can anyone help me with my heating rain and snow sensor? I have a sensor like the one in the picture below, but I can't find any datasheet, so I don't know how to communicate with it. I am using an RS485 to TTL converter, and now I'm wondering if someone has worked with that sensor and Arduino before or if someone has a datasheet to share with me.