Characteristic	USR-W600	USR-W610	USR-W630
Photo
Power Supply	5V -36V	5V -36V	5V -36V
Serial Port	RS232 or RS485	RS232 or RS485	RS232 or RS485
STA limits in AP mode	3	24	24
Works as TCP server, available number of TCP client	5	24	24
Ethernet Port	/	1	2
Working Mode	AP/STA/AP+STA	AP/STA/AP+STA	AP/STA/AP+STA
Editable Web Page	√	√	√
Identity Packet	√	√	√
User Configuration AT+command / Web page	√	√	√
Heartbeat Socket	√	√	√
RTS/CTS Flow Control	√	√	√
Communication Distance ( Device to device in open area)	240m	300m	210m
Web socket	/	√	√
Modbus RTU to TCP	/	√	√
MQTT Protocol	/	Special Firmware	Special Firmware