Which data protocol do you need for your building automation project?
RS485
Weather sensors and weather stations with RS485 data protocol
![RS485 RS485 icon](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_RS485-Icon_DT.png)
![RS485 RS485 icon](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_RS485-Icon_MB.png)
Modbus
Weather stations and sensors for temperature, humidity, CO2, dew point, filling level. Modbus slaves with RS485 interface and RTU protocol. Suitable for Modbus masters such as PC, TCP, SPS or MC
![Modbus Modbus icon](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_Modbus-Iconn_DT.png)
![Modbus Modbus icon](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_Modbus-Iconn_MB.png)
Two-Wire Sensors Conventional
Temperature sensors, rain sensors, wind sensors, fill level sensors, leakage sensors; with switching output (relay)
![Two-Wire Sensors Conventional Icon with rectangle and waves](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_Konventionell-Icon_DT.png)
![Two-Wire Sensors Conventional Icon with rectangle and waves](https://www.elsner-elektronik.de/media/catalog/category/icons/Elsner_Konventionell-Icon_MB.png)