eTung MD-309 2G DTU User manual

MD-309 2G DTU User Manual
eTung Technology Co. Ltd
305 Gengfang Plaza, Jia 13 Huayuan Road, Haidian Dist. Beijing
TEL:[phone] FAX:[phone]
Website: www.etungtech.com.cn
Copyright © 2005-2016 ALL RIGHTS RESERVED

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This manual applies to the following DTU models, and the corresponding
networks supported by the models are listed in the table below:
Model
Network
MD-309G
China Mobile and China
Unicom’s 2G
MD-309C
China Telecom’s CDMA2000

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Table of Contents
1. Product Introduction .......................................................................................................4
1.1 Brief Introduction .........................................................................................................4
1.2 Product Outlook ............................................................................................................6
1.3 Standard Accessories..................................................................................................7
1.4 Dimensions .....................................................................................................................9
1.5 Working Mechanism ..................................................................................................11
1.6 Specifications ............................................................................................................... 11
1.6.1 Technical Parameters.................................................................................... 11
1.6.2 Indicator Light Description..........................................................................12
1.6.3 Serial Port Definition .....................................................................................13
2.1 Technical Advantages ...............................................................................................13
2.2 Typical Usecases.........................................................................................................15
2. Device Configurations...................................................................................................17
2.1 Configurations..............................................................................................................17
2.1.1 Preparation........................................................................................................17
2.1.2 Configuring MD-309 ......................................................................................17
2.2 Configuration Parameters .......................................................................................20
2.3 Restore to Default ......................................................................................................25
2.4 Firmware Update ........................................................................................................25
2.5 Remote Configurations.............................................................................................27
Appendix 1: Usecase of Point to Data Center Testing......................................................36
Appendix 2: Usecase of Vircom Testing with eYun platform .........................................41
Appendix 3: Switching RS-485 to RS-232............................................................................47
Appendix 4: Building Data Center ...........................................................................................51
Appendix 5: DTU’s AT Commands at Serial Port................................................................54
Appendix 6: DTU SMS Mode and SMS Data Format.........................................................57

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1. Product Introduction
This chapter mainly introduces the outlook, accessories, specifications and
mechanism of MD-309.
1. Brief Introduction
2. Product Outlook
3. Accessories
4. Dimension
5. Working Mechanism
6. Specifications
7. Technical Advantages
8. Typical Usecases
1.1 Brief Introduction
MD-309 is a 2G DTU produced by eTung in 2010. It can greatly reduce
customer’s DTU procurement and integration cost, and has
industrial-grade stability and reliability as well. MD-309 has more
reasonable cost control, with lower price; it has more plentiful
interfaces and ways of software integration; it can be regarded by
customers as an easy-to-use and useful 2G DTU product.
It can connect with mServer, and other kinds of data center software
as well;
It supports China Mobile and China Unicom’s 2G, and China Telecom’s
CDMA networks;
The serial port DB9 pins support RS232 and RS485 at the same time,
and the serial port type(RS232 or RS485) can be configured via
DTU configuration software or remote control;
1
It can be used without shell, and on the switch board there are
preserved data and power interfaces (pin socket);
The size without shell is smaller, and there are preserved installation
holes that can be easily integrated into customer’s device;
It supports use cases such as point to point, point to multiple points,
and serial to serial port;
It uses industrial components and can be used in adverse environment;
1
MD-309 3.0.7 and higher versions support this function

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It can work within -35ºC ~+70ºC temperature range.
MD-309 can connect quickly with RTU, PLC, or IPC, and implement
remote and transparent data transfer. It can be used widely in various
industries related to “Internet of things”:
In electric power industry, MD-309 can be used in data transfer areas
such as reactive compensation, distribution monitoring, electric meter
reading and lamp monitoring;
In water application industry, MD-309 can play in wireless
communication areas such as water meter reading, water resource
remote monitoring, and water transportation network monitoring;
In environment protection area, MD-309 can fully deserve 2G soldier in
pollution online monitoring system such as Continuous Emission
Monitoring System(CEMS), water quality monitoring system;
In device maintenance area, such as elevator monitoring and
air-conditioner monitoring, MD-309 can be embedded quickly into
customer’s appliance and implement 2G wireless data transfer;
In heating industry, MD-309 can connect with MODBUS concentrator to
implement heating meter reading, implement remote data transfer for
household heating measurement; it can also connect with PLC or
collector to implement remote monitoring of heat exchange station.

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
1.2 Product Outlook
Figure 1-1: MD-309 side view 1
Figure 1-2: MD-309 side view 2
①
Serial
port
RS232/48
5
③
Antenna
pedestal
②
DC
power
interface
⑧
installation
handle
⑦
indicator light
(
)
green, red
⑤
SIM
card
holder
⑥
button
used
for
eject
ing
the sim card holder
⑧
installation
handle

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Figure 1-3: MD-309 top view without shell
1.3 Standard Accessories
Figure 1-4: 2G sucking antenna

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Figure 1-5: 9-pin and 9-hole direct serial line
Figure 1-6: Power supply

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1.4 Dimensions
Figure 1-7: MD-309 dimension with shell

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Figure 1-8: MD-309 dimension without shell 1
Figure 1-9: MD-309 dimension without shell 2

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1.5 Working Mechanism
Figure 1-10: MD-309 working mechanism
After configuring IP address (or domain name) and port of the data
center in MD-309, it dials in GPRS or CDMA wireless network to access
the internet; then it establishes connection to the preconfigured IP
address and port(i.e. mServer's listening port). On the other hand, the
user software system connects to the mServer via virtual serial port,
thus implements the wireless and bi-directional data communication
between user device and user software system.
1.6 Specifications
1.6.1 Technical Parameters
Basic Parameters
Power Supply: +5 ~ +36V wide range of voltage input
Power Connector: inner(+) outer(-)
Data interface: RS232/485/422/TTL
Humidity: 95%@+40ºC
Dimensions: 103x64x24mm (excluding antenna and handle)
Model
Nework & Frequency
Work/Standby
Current
Temperature
MD-309G
GSM/GPRS/EDGE:
850/900/1800/1900MHz
70/20mA
@+12V DC
-40ºC ~ +85ºC
MD-309C
CDMA2000 1x:
800/1900MHz
120/90mA
@+12V DC
-25ºC ~ +70ºC

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Communication
Adjustable baud rate on data interface
Support hard flow control on serial interface
Support standard TCP/IP protocol with both TCP and UDP
Adjustable heart-beat interval and time-out value
Support always online
Support SMS and ringing tone wakeup(wakeup online)
Support Address-IMEI Mapping to save wireless bandwidth
Stability
Host CPU: 32-bit ARM processor
Built-in soft/hard watch dog
Built-in TCP/IP protocol stack
Data Center
Support domain name
Compatible with various data center software
Configuration
Configurable via serial port
Configurable via hyper terminal with menus
1.6.2 Indicator Light Description
LED Indicator
Light
Color
Status
Description
Online
Green
Always light
Connected to data center
Extinguished
No connection to data center
Flash quickly
Connecting to data center
Flash slowly
Dialing
Sending
Red
Flash
Transferring data/Standby
Turn off
No data transfer
Table 1-1 MD-309 indicator light description

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1.6.3 Serial Port Definition
2Type
RS-232
RS-485
Pin
2
3
5
7
8
Definition
TXD(out)
RXD(in)
GND
A
B
Table 1-2: MD-309 serial port pin definition
2
Type
RS-232
RS-485
Pin
2
3
5
7
8
2
3
5
Definition
TXD(out)
RXD(in)
GND
RTS(in)
CTS(out)
A
B
GND
Table 1-3: MD-309 serial port pin definition
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2.1 Technical Advantages
eTung DTU products are advanced not only from hardware
industrialization, design rationality, software convenience, and
usage flexibility, but also from working stability. Its technical
advantages are easy to see:
Support point-to-point and multipoint-to-point communication
with 2G wireless network at both ends
Support connecting to 4 data centers at the same time
Support China Mobile and China Unicom’s GPRS, and China
Telecom’s CDMA networks
The serial port DB9 pins support RS232 and RS485 at the same
time, and the serial port type(RS232 or RS485) can be
configured via DTU configuration software or remote control;
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Support sending SMS
Support 2G and SMS as backup
Support modifying DTU configurations via SMS
Support modifying DTU configurations remotely at server side
Support querying SIM card number remotely, checking SIM
card balance and traffic within DTU
Support device remote re-boot
2
This definition applies to MD-309 V3.0.7 and higher versions
3
This definition applies to MD-309 lower versions than V3.0.7
4
MD-309 3.0.7 and higher versions support this function

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Support 2G APN name auto-adaption
Support LBS location
Support eYun platform, server building not needed and
plug-and-play
Support chuankoutong, virtual serial port programming not
needed

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2.2 Typical Usecases
Figure 1-11: MD-309 multiple points to data center
Figure 1-12: MD-309 one point to multiple data centers

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Figure 1-13: MD-309 implements point to point via terminal mapping within
mServer(serial to serial port)
Figure 1-14: MD-309 implements point to point with embedded data center
(serial to serial port)

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2. Device Configurations
This chapter introduces how to use MD-309 and related parameters,
with MD-309G as example.
1. Configurations
2. Parameters
3. Restore to default
4. Firmware Update
5. Remote Configurations
2.1 Configurations
2.1.1 Preparation
Serial line used to connect MD-309 with PC or user devices
2G Antenna
Power Adapter
one SIM card, either from China Mobile or China Unicom, that
applies 2G and can access internet directly via NET
2.1.2 Configuring MD-309
Connect MD-309 with PC using 9-pin 9-hole serial line
Attention:
1) MD-309 V3.0.7 and higher versions support RS232 and
RS485 serial port at the same time, when using DTU
configuration software to configure it, whether the serial port
type is RS232 or RS485, the configuration software
communicate with MD-309 as RS232 type. Therefore,
although the serial port type is set to RS485, when connecting
with PC to configure it, use 9-pin 9-hole serial line directly and
RS485-RS232 converter is not needed.

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2) For MD-309 version lower than V3.0.7, if MD-309 is with
RS485 interface, we need an adapter from RS485 to RS232,
switch RS485 to RS232 and then connect with PC. For details
please see Appendix 3 Switching RS-485 to RS-232.
Find and run MD-309 dedicated configuration executable
DTUcfg.exe either from the CD or by downloading from eTung
website(http://www.etungtech.com)
Click button "Settings" in the upper side of the user interface,
and in the popup dialog with title "Settings", select the serial port
that is used to configure MD-309, then click OK:
Figure 2-1: Setting serial port
Click "Start configuration" based on the prompt, and power on
MD-309 quickly within 30 seconds; when the information about
MD-309 model appears, press Enter, then the first item of the
configuration menu appears: "1) Data center domain or IP ()",
then input domain of the data center: eyun.etungtech.com (or
press Enter to use the default value in the bracket. The default
value is eTung server domain, please input your own domain or
IP address if you have built your own server).
Press Enter, then the second configuration item appears:
"Data center port (8080)", input mServer's listening port "8080"
(or press Enter directly to use the default value in the bracket.

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This port is the public port of eTung server, input your own port
if you have built your own server or leased a dedicated port).
Figure 2-2: Setting domain(or IP) and port of data center
If eTung chuankoutong eYun version is used, configure the
applied username in MD-309. If you have built your own server,
or you do not use eTung chuankoutong eYun version, you do not
need to configure this item.
Figure 2-3: Configuring username
Click Enter repeatedly until the prompt "Configuration complete"
appears, then the configuration of MD-309 is complete:

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Figure 2-4: Configuration complete
2.2 Configuration Parameters
Each configuration menu item of MD-309 includes the following
items (those with * are mandatory), details are in the following:
*Order number: includes digit and right bracket, for example
"10)"
*Name and unit: name of the configuration item (some items
have unit)
Optional values: the contents within "[]" are the values that are
allowed in this configuration item, multiple optional values are
separated with "/"
*Default value: i.e. the content within "()", If you press Enter to
Attention:
I
n reality, MD
-
309
connects user devices via serial port,
so serial p
ort attributes and type need to be configured in order
to match user device serial port.