USR IOT USR-N540 - Default Chapter; Table of Contents

USR-N540 User Manual www.usriot.com
Jinan USR IOT Technology Limited 2 / 73 inquiry@usriot.com
Contents
1. Quick Start ........................................................................................................................................................ 4
1.1. Hardware Testing Environment ................................................................................................................. 4
1.2. Network Test Environment........................................................................................................................ 4
1.3. Default Parameter .................................................................................................................................... 5
1.4. Data Transmission Test ............................................................................................................................. 6
2. Overview ........................................................................................................................................................... 7
2.1. Brief Introduction .................................................................................................................................... 7
2.2. Features .................................................................................................................................................. 7
2.3. Basic Parameter ....................................................................................................................................... 8
2.4. Dimension ............................................................................................................................................... 9
2.5. Indicators and Dial switch ....................................................................................................................... 10
2.5.1. Indicator light .............................................................................................................................. 10
2.5.2. Dial Switch .................................................................................................................................. 10
2.6. DB9 Pin Definition .................................................................................................................................. 12
2.7. DB9 Pin-board ....................................................................................................................................... 12
3. Product Function ............................................................................................................................................. 13
3.1. Socket A Communication ........................................................................................................................ 14
3.1.1. TCP Client Mode .......................................................................................................................... 14
3.1.2. TCP Server Mode ......................................................................................................................... 17
3.1.3. UDP Client Mode ......................................................................................................................... 18
3.1.4. UDP Server Mode ........................................................................................................................ 21
3.1.5. TCP and UDP Comparison ............................................................................................................. 24
3.1.6. HTTPD Client ............................................................................................................................... 24
3.2. Socket B Communication ........................................................................................................................ 26
3.3. Short Link .............................................................................................................................................. 28
3.4. USR-VCOM Application ........................................................................................................................... 28
3.5. Modbus Gateway ................................................................................................................................... 30
3.5.1. Transmit Modbus Protocol in Transparent Mode ............................................................................ 30
3.5.2. Modbus RTU to Modbus TCP ........................................................................................................ 30
3.5.3. Modbus Active Query Function ..................................................................................................... 31
3.5.4. Modbus Polling ............................................................................................................................ 34
3.6. USR-Cloud Function ............................................................................................................................... 39
3.7. Value-added Functions ........................................................................................................................... 40
3.7.1. DHCP .......................................................................................................................................... 40
3.7.2. DNS ............................................................................................................................................ 40
3.7.3. Heartbeat Packet Function............................................................................................................ 40
3.7.4. Registration Package Packet Function ............................................................................................ 42
3.7.5. Web to serial ............................................................................................................................... 44
3.7.6. Customized Webpage ................................................................................................................... 46
3.7.7. Network Printing Function ............................................................................................................ 47
3.7.8. Serial Port Packaging Mechanism .................................................................................................. 49