1.  Typical Application

 InDTU332GS can be used to connect your serial device (RS232/485) to internet via GPRS network.

2.  Seven Steps to Internet  

2.1. Step 1: Insert SIM Card

Open InDTU plastic housing and insert SIM/UIM card and close the case.

2.2. Step 2: Install Antenna

Attention: The position and angle may influence the quality of signal.

2.3. Step 3: Power On  

Link the power supply in the product package, watch where the Power LED on the panel is light up. If not, please confirm if your power supply is correctly installed or you can connect with InHand for technical supports.

2.4. Step 4: Link DTU to PC for configuration  

Link the InDTU’s terminal with DB9 interface to PC using a USB to DB9 line (you can buy it from local tool shops)

2.5. Step 5: Open Configure Software  

After correctly link InDTU to PC, open the configure software, select the right COM port and enable “Auto” to let software auto detect InDTU:

Then there’ll be a window display, you should input adm/123456 to login, else, you can not use this tool to configure InDTU:

Notice: the configure tool will detect the InDTU every 5 seconds and the button will turn “disabled” for 1 second, at this time you can change the parameters, but if you want to write configuration to InDTU, you should wait until the button “enabled”.

Click “Read Conf. File” button to get the configure file of InDTU:

Click “Work Mode”>”Link Mode” and set as “Always Online”:

Click “GPRS” settings then input the right parameters you get from local mobile operator:

Auto Dialup --- “On”: dialup automatically after configuration

“Off”: dialup on demand (triggered by SMS/Call/Serial Data)

Dialup Number--- default: *99***1#, provided by local mobile operator

APN/Username/Password --- provided by local mobile operator

PPP Heartbeat Interval --- the heartbeat to keep link alive

Redial Interval --- when ppp dialup failed, after this interval, InDTU will redial

MAX Retries --- after MAX Retries and no dialup successful, InDTU will reboot

Click “Data Center” to configure the details of where InDTU send data to:

DTU No. --- the No. for identification

Center IP --- User’s data center IP address (must be a static ip, if you have DNS only, just set it blankand turn to DNS)

Port --- User’s data center server’s port

DNS --- if your center has only DNS, you can set DNS to let InDTU access to data center

Protocols --- TCP/UDP client, Modbus Bridge. For Kingview SCADA, you can also set DC UDPprotocols

Heartbeat Interval --- after this interval, InDTU will send a heartbeat to detect whether the server is reachable

MAX Retries --- after MAX Retries and no heartbeat successful, InDTU will reboot

DNS IP1/IP2 --- Domain Name Server, recommended setting: 8.8.8.8/8.8.4.4 (Google DomainName Server)

If you have multiple center need InDTU to send data to, you can click “Multi-Center” to set more data center addresses. Then InDTU will also transfer the data from serial port to all these centers.