Smart IoT Gateway - iConnector




This document is applied for the following products

STHC-ISG02DB HW Ver. 3.3 FW Ver. 3.4
WS433-CL-04 HW Ver. 2.3 FW Ver. 1.9.3
Item Code

STHC-ISG02DB-WS433-CL-04 iConnector 3G Dual Band*, internal GSM antenna, integrated wireless co-ordinator with 0 dbi external antenna, M12 male connector, RS485 ModbusRTU

1. Functions Change Log

  HW Ver. FW Ver. Release Date Functions Change
Gateway 3.3


Co-odinator 2.3 1.9.3 NOV-2019  

2. Introduction

STHC is a Smart IoT Gateway, aka iConnector, a main component in any IoT application. iConnector has a role to connect the real World's things like sensors, meters, , server system for data logging, data analytics, monitoring & controls... This iConnector is build-in a wireless co-ordinator in a wireless sensor network, a high-performance type to facilitate remote configuration and diagnostics, as well as remote monitoring and control via any IIoT platform. It is able to configure the parameters for all end nodes in the network. By the Sub-Ghz technology from Texas Instruments, it is easy to establish multiple networks in same area without interference or channel conflict. One co-ordinator can handle maximum of 40 end nodes in its network. LOS transmission distance up to 6000m. The installation and configuration is very simple. Setting up a wireless sensor network has never been this easy.


3. Specification

Host Communication Cellular type Dual band (2100/900)/3G, internal GSM antenna, integrated wireless co-ordinator
Fieldbus communcation ModbusRTU x 01 port
Data speed Up to 50kbps
Tranmission distance LOS 6000m @ 50 kpbs (antenna height is 4m minimum)
Antenna Standard external antenna 0 dbi, option 3dbi, 6dbi, 9dbi
Power supply 7..48VDC, avg 200mA, peak 1.5A
On-board memory & sensors 2MB Flash, PCB temperature sensor
Electrical connector M12-female, 4-pin A-coding
Buzzer Internal buzzer
Back-up battery Lithium Super Capacitor
RF frequency band Free license ISM 433.92Mhz (for others 868, 915, 920Mhz, refer related datasheets)
Ready to comply ETSI EN 300 220, EN 303 204 (Europe) FCC CFR47 Part15 (US), ARIB STD-T108 (Japan)**
Vietnam Type Approval Certification QCVN 73:2013/BTTTT, QCVN 96:2015/BTTTT (DAVITEQ B00122019)
Security Standard AES-128
Operating temperature -40oC..+85oC
SIM slot 01 x micro-SIM
Housing Aluminum + Polycarbonate, IP67
Included accessories Mounting bracket for wall mount
Product dimension H106 x W73x D42 mm (excluded antenna)
Net weight 190 grams
Box dimension W160 x D150 x H100 mm
Gross weight < 300g

4. Product Pictures

STHC-ISG02DB-WS433-CL-04-H1.png STHC-ISG02DB-WS433-CL-04-H2.png
STHC-ISG02DB-WS433-CL-04-H3.png STHC-ISG02DB-WS433-CL-04-H4.png
STHC-ISG02DB-WS433-CL-04-H5.png STHC-ISG02DB-WS433-CL-04-H6.png
STHC-ISG02DB-WS433-CL-04-H7.png STHC-ISG02DB-WS433-CL-04-H8.png

5. Operation Principle

After the power supply will have 5 minutes to add nodes (value enb_auto_add_sensors = 1 in 5 minutes then = 0), push button function and hall sensor are only available in the first 5 minutes

Push Button or Hall sensor for the first 5 minutes when power is available:

5.1 Add Sensor Node

 Add Sensor Node ID automatically



If you do not hear the "Peep" sound, please disconnect the power the iConnector, wait a few minute and try again.

Node id added in this way will be written to the smallest node_id_n address which is = 0.

Set Rssi_threshold (see RF MODE CONFIG (in the Modbus Memmap of WS433-CL-FW_V1.9), default -25): The case if Co-ordinator is on high position and need to add node sensor. We set the sensor as close as possible and set the Rssi_threshold to -80, -90 or -100 to increase the sensitivity to allow iConnector can add sensors at a longer distance. After that, perform 2 steps of adding sensors and then reset Rssi_threshold = -25.

Enb_auto_add_sensors configuration (see RF MODE CONFIG (in the Modbus Memmap of WS433-CL-FW_V1.9)): In case you do not want to turn off the power iConnector, you can set Enb_auto_add_sensors = 1, this way we have 5 minutes to add nodes (add up to 40 nodes) . After 5 minutes Enb_auto_add_sensors will automatically = 0.


Memmap resgisters

You can download Modbus Memmap of WS433-CL-FW_V1.9 with the following link:

5.2 Check after configuring the iConnector

First, you need to prepare


Step 1: Open Modbus tool on PC




Step 2: Check information of sensor after adding S/N of each sensor

5.3 SIM configuration

iConnector 3G uses micro-SIM and needs to be configured to use the data network

  1. Open iConnector cover and install the SIM card