LMGateway103-IoT


IoT Gateway


  • 1*RS485 & 1*10/100 Mbps Ethernet
  • Easy interface to be able to talk to any industrial device over any protocol
  • As Modbus RTU/Modbus TCP server
  • Make the leap from hardware to cloud dashboard by MQTT.
  • CE/FCC Certification
  • 4G/WiFi/Wire

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CPU ARM926EJ, clocked at 300MHz
Memory 64MByte High Performance Memory
Nand Flash 128MByte SLC Flash
Serial Port One fully isolated RS485/RS232 interface multiplexing
Network Port One ​​100M/10M Ethernet Interface
4G Module Built-in 4G Full Netcom Module
Power DC9V~48V, support anti-reverse, anti-thunder, over-current protection, etc.
Whole weight 290g
Shell protection level IP51
Installation Dimensions 98.5mm×96mm×27mm(L×W×H) 含挂耳
Mechanical Installation DIN Rail Card Slots
Power Consumption Maximum power consumption of the motherboard ≤5W
Working temperature -40~85°C
Work Relative Humidity 20~90% No Condensation
Instrumentation Data acquisition driver Serial port Network port
Modbus protocol Modbus RTU Modbus TCP, Modbus RTU_over_TCP
DLT645 protocol DLT645-1997, DLT645-2007 /
CJ188 protocol CJ188 /
Mbus MBus_EnergyMeter, MBus_EN1434 /
PLC Mitsubishi Agreement Mitsubishi Fx3U /
Mitsubishi Fx485 /
/ Mitsubishi_QBinary
Siemens protocol Siemens S7-200 PPI Siemens S7-200 Network
/ Siemens S7-300 Network
/ Siemens S7-400 Network
/ Siemens S7-1200 Network
/ Siemens S7-1500 Network
AB / AB NET
OMRON Protocol OMRON_HOSTLINK OMRON_FINS
Building communication BACnet protocol BACnet MS/TP BACnet IP
Industrial control and automation interface standards OPC protocol / OPC UA, OPC DA, OPC XML DA
Substation communication standard IEC protocol / IEC104
Non-standard protocol Instrumentation Yiling temperature controller /
dlt645 JX Digital /
dlt645-2007 extended protocol /
Jiangsu Runyi Water Meter /
HL-MODBUS protocol /
CJ/T133-2012 IC card water meter /
DLT645-Fee Control /
CJ/T133-2012 MBus IC card water meter /
ModbusRTU_TancyA1 /
Allen_Bradley_DF1 /
modbus Shendong 43 /
CJ188贵翔 /
Beijing Mingcheng Zhonghui Sunshade Curtain /
SGA400 /
DEET-BUS /
Internet interface Internet collection / mqtt client subscription
/ Gold map weather forecast
/ Zhejiang Dahua HTTP
/ HTTP collection
/ Air Quality
  • Gateway acts as Modbus RTU, Modbus TCP server provides external data

    Support 0x, 1x, 3x, 4x, 4 functional areas

    Supports int16, int32, float32 and various data types


  • The gateway provides an http server, which supports two common methods of GET and POST. Users can retrieve the real-time data and stored historical data of the gateway through the http server interface.


  • The gateway can serve as an MQTT client, connecting Alink (Alibaba Cloud), Baidu Cloud, Tencent Cloud, Tlink and other private clouds.

    Push the data points of the gateway to the cloud through a subscription and publishing mechanism. The gateway reads and writes the front-end equipment.Romi Measurement & Control launched the IoT data center, which is convenient for users to verify IoT applications such as gateways, cloud services, and WeChat public accounts.