Saturn Pyro Sdn Bhd
Johor Bahru Office
44 & 44A, Jalan Palma Rafis 1,
Taman Dato Chellam,
81800 Ulu Tiram,
Johor, Malaysia.

Shah Alam Office
K03-03-12, Tower 3,
UOA Business Park,
No 1, Jalan
Pengaturcara U1/51A,
Section U1, Kawasan
Perindustrian Temasya,
40150 Shah Alam,
Selangor, Malaysia.
Penang Office
Penthouse 1-21-1,
Suntech @ Penang Cybercity
Lintang Mayang Pasir 3,
11950 Bayan Baru,
Penang, Malaysia.

Bangalore Office
Saturnpyro Solutions Pvt. Ltd.

SFS-B-38, 1st Floor, 7th B Main Road,
Yelahanka New Town, Bangalore 560 064.
+91 829 192 0602
+601 7488 7001
India Office
Saturn Pyro India

3, Gr Floor, Eishita,
Shiv Vallabh Cross Road,
Ashokvan, Dahisar (E.),
Mumbai 400068.
+91 22284 84682
+91 98191 56654

3WIRE - RS2MQTT IoT Gateway

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3WIRE - RS2MQTT IoT Gateway 3WIRE Serial Device Server Gateway


3Wire RS2MQTT is an Industrial Grade 4G IoT Gateway which connects your Serial and Ethernet* devices, such as PLCs, meters and sensors to an IoT platform.
RS2MQTT is able to poll the required data from your Serial devices and send it as MQTT or HTTP Post over GPRS or LTE network. You can configure the connected devices thru the serial port, configuring and defining the required data and interval.
Upto 800 data records are stored in its internal cache memory to prevent data loss if the 2G / 4G connection is lost. The unit also comes with specially designed watchdog circuit to ensure stable continuous operation of 4G connectivity.


  • Supports 3 Modes; TDD-LTE, FDD-LTE & GSM
  • Supports baud rate of 300bps ~ 921600bps, 5 ~ 8 data bits and parity can be “None”, “Odd”, “Even”, “Mark” & “Space”
  • Serial port interface for RS232 / 485; terminal block for RS485 and DB9 for RS232
  • Supports Serial Port Transparent Transmission, Modbus RTU to Modbus TCP & MQTT Protocol
  • Supports serial port AT Command configuration
  • Power+4G / Link / Active LED indicator
  • MQTT can be configured over the serial port
  • DTL-645 & Modbus RTU parameters can be polled and converted to JSON fomat
  • Upto 32 slaves connected on RS485 bus; with upto 200 parameters polled
  • Heartbeat & Keep Alive function ensures a reliable connection
  • Automatic discovery and configuration using provided 3Wire Device Management software
  • Wide voltage 9VDC ~48VDC; DC-Jack
  • Plug-in screw terminal wiring; accepts AWG12 ~AWG30 wires

General Specs
Interface RS485/422: Terminal; RS232: DB9
Power Supply 5.5mm Plug & 2 Way Plugable Terminal Block
Dimensions 94mm (L) x 65mm (W) x 25mm (H)

Supported Modes 4G CAT 1 Supports 2G & 4G
B1 / B3 / B5 / B8 @ FDD LTE
B34 / B38 / B39 / B40 / B41 @ TDD LTE
B3 / B8 @ GSM
Transmission Rate (Maximum) LTE : 10Mbps (downlink ) & 5Mbps (uplink)
GPRS : 85.6Kbps (downlink) 85.6Kbps (uplink)
SIM Card 3V & 1.8V; Standard SIM
Antenna 50Ω / SMA Type

Serial Parameters
Baud Rate
300 ~ 921600bps
Data Bits 5 bits ~ 8 bits
Parity None, Odd, Even, Mark, Space 


Protocol MQTT & HTTP Post
Configuration 3Wire Device Management Software

Power Requirement
924V DC80mA@12V 40mA@24V

Operation Temperature -40°C ~ 85°C 
Storage Temperature
-45°C ~ 125°C
Humidity 5 ~ 95% RH

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