Can mmWave Radar Sensor SEN0395 be connected to UART to RS485 module?
Blyeet.Durek 2025-07-10 09:27:59 242 Views2 Replies I am having a smart hospital design project to control the usage of water and electricity.
I want to implement the SEN0395 with another Flow sensor in a monitoring system to determine if a room has people in it and if there is a water leakage. About the job of the SEN0395, electricity (and maybe water) will be cut off if there are no people present, which will help reduce wasted usage when people leave the room without turning off devices such as fans, air conditioners, or lights.
In the monitoring system, I want to control various things via a PLC with RS495 extension from a distance, so I plan to use a UART to RS485 module for the sensor to communicate with the PLC.
Is this method possible?
Using a custom AT-command-style protocol, the SEN0395 communicates via UART (9600 baud).
Most simple flow sensors (like YF-S201) output pulses rather than digital UART data.
In this case, you'd need a microcontroller (e.g., ESP32, Arduino) to read the pulse frequency and convert it to serial data. RS-485 is only a transport layer. You need to convert UART or digital pulse signals into a format your PLC can understand—often Modbus RTU, if your PLC supports it.
ahsrab.rifat 
