Heating rain and snow sensor with rs485 output

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.

I would contact your vendor and ask for either your money back or a data sheet as it is useless to you in its existing condition.

Hi
There are several types of FW for this sensor.
Please check the following URLs.

  1. RK-XX-XX-X (instrucenter.com)
    https://instrucenter.com/wp-content/uploads/2022/03/RS-FSJT-No1.pdf

  2. 20200628025348Rainandsnowsensorinstructionmanual.doc (live.com)
    https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fmyosuploads3.banggood.com%2Fproducts%2F20200628%2F20200628025348Rainandsnowsensorinstructionmanual.doc&wdOrigin=BROWSELINK

regards

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