2-port Modbus RTU/ASCII to Modbus TCP gateway

PM822

1 x RS232
1 x RS485/RS422
Ethernet + WiFi
Modbus TCP to RTU/ASCII

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2-port Modbus RTU/ASCII to Modbus TCP gateway

PM830

2 x RS232/422/485
Modbus TCP to RTU/ASCII
WiFi
Ethernet

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2-port Modbus RTU/ASCII to Modbus TCP gateway with LAN ports

PM830L

2 x RS232/422/485
4 x LAN
WiFi
Ethernet
Modbus TCP to RTU/ASCII

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4-port Modbus RTU/ASCII to Modbus TCP gateway

PM834

4 x RS232/422/485
Ethernet
WiFi
Isolation protection
Modbus TCP to RTU/ASCII

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1-port Modbus RTU/ASCII to Modbus TCP gateway

ESP32M

1 x RS232/422/485
Modbus TCP to RTU/ASCII
Ethernet + WiFi

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2-port Modbus RTU/ASCII to Modbus TCP gateway with digital I/O

PD822M

Modbus TCP to RTU/ASCII
1 x RS232
1 x RS422/485
Modbus TCP DIO
Modbus RTU DIO
http CGI DIO
2 x Digital input
2 x Digital output
Ethernet
WiFi

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2-port Modbus RTU/ASCII to Modbus TCP gateway with digital I/O

PD830M

Modbus TCP to RTU/ASCII
1 x RS232/485/422
1 x RS232/485
Modbus TCP DIO
Modbus RTU DIO
http CGI DIO
2 x Digital input
2 x Digital output
1 x microSD
Ethernet
WiFi

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2-port Modbus RTU/ASCII to Modbus TCP gateway with digital input

PD824M

Modbus TCP to RTU/ASCII
1 x RS232
1 x RS422/485
Modbus TCP DIO
Modbus RTU DIO
http CGI DIO
4 x Digital input
Ethernet
WiFi

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1-port Modbus RTU/ASCII to Modbus TCP gateway

EM130WB

Discontinued

1 x RS232/RS485/RS422
WiFi
Modbus TCP to RTU/ASCII

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4-port Modbus RTU to Modbus TCP gateway

PiCM4M4

Ethernet, WiFi (optional)
4 x RS232/422/485
1 x Giga LAN
1 x 10/100 LAN
2 x USB 3.0
2 x USB 2.0
RTC, Buzzer, I2C, SPI, HDMI, Fan
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2-port Modbus RTU/ASCII and Modbus TCP to MQTT gateway

PMQ822

1 x RS232
1 x RS485/422
Ethernet
WiFi

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2-port Modbus RTU/ASCII and Modbus TCP to MQTT gateway

PMQ830

2 x RS232/485/422
Ethernet
WiFi

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2-port Modbus RTU/ASCII and Modbus TCP to MQTT gateway with data logger

PMQ830DL

2 x RS232/422/485
Data logger
Ethernet
WiFi

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2-port Modbus RTU/ASCII and Modbus TCP to MQTT gateway over 4G with data logger

PMQ830DLG

1 x RS232/422/485
1 x RS232/485
Data logger
Ethernet
4G

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Modbus TCP/RTU digital I/O

EM130WBD

Discontinued

2 x Digital input
4 x Digital output
Modbus TCP DIO
Modbus RTU DIO
1 x RS422/485
WiFi

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Modbus (MQTT) Gateway Models Comparison

1-port Modbus RTU/ASCII to Modbus TCP gateway over LoRa

LR200EM

Ethernet

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Modbus RTU digital I/O over LoRa

LR200DM

2 x Digital input
2 x Digital output

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