Chonghan CH-M3G2M6 User manual

2018-3-30
Chonghan CH
-M4
Wireless Modem
User manual
Chonghan Wireless Modem Series
User manual
Cai Jinyong
CHONGHAN CO., LTD.

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崇瀚科技
Chonghan
Power by Chonghan

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Important Notice
Due to the nature of wireless communications, transmission and reception of data can never
be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although
significant delays or losses of data are rare when wireless devices such as the Chonghan Wireless
device are used in a normal manner with a well‐constructed network, the Chonghan Wireless
device should not be used in situations where failure to transmit or receive data could result in
damage of any kind to the user or any other party, including but not limited to personal injury,
death, or loss of property. Chonghan Wireless accepts no responsibility for damages of any kind
resulting from delays or errors in data transmitted or received using the Chonghan Wireless device,
or for failure of the Chonghan Wireless device to transmit or receive such data.
Safety and Hazards
Do not operate the Chonghan Wireless device in areas where blasting is in progress, where
explosive atmospheres may be present, near medical equipment, near life support equipment, or
any equipment which may be susceptible to any form of radio interference. In such areas, the
Chonghan Wireless device MUST BE POWERED OFF. The Chonghan Wireless device can transmit
signals that could interfere with this equipment. Do not operate the Chonghan Wireless device in
any aircraft, whether the aircraft is on the ground or in flight. In aircraft, the Chonghan Wireless
device MUST BE POWERED OFF. When operating, the Chonghan Wireless device can transmit
signals that could interfere with various onboard systems.
Note: Some airlines may permit the use of cellular phones while the aircraft
is on the ground and the door is open. Chonghan Wireless device may be
used at this time.
The driver or operator of any vehicle should not operate the Chonghan Wireless device while
in control of a vehicle. Doing so will detract from the driver or operator’s control and operation of
that vehicle. In some states and provinces, operating such communications devices while in control
of a vehicle is an offence.
Limitations of Liability
This manual is provided "as is". Chonghan Wireless makes no warranties of any kind, either
expressed or implied, including any implied warranties of merchantability, fitness for a particular
purpose, or infringement. The recipient of the manual shall endorse all risks arising from its use.
The information in this manual is subject to change without notice and does not represent a
commitment on the part of Chonghan Wireless. CHONGHAN WIRELESS AND ITS AFFILIATES

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SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL DIRECT, INDIRECT, SPECIAL, GENERAL,
INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES INCLUDING, BUT NOT
LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED PROFITS OR REVENUE ARISING OUT
OF THE USE OR INABILITY TO USE ANY CHONGHAN WIRELESS PRODUCT, EVEN IF CHONGHAN
WIRELESS AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR
THEY ARE FORESEEABLE OR FOR CLAIMS BY ANY THIRD PA RTY.
Notwithstanding the foregoing, in no event shall Chonghan Wireless and/or its affiliates
aggregate liability arising under or in connection with the Chonghan Wireless product, regardless
of the number of events, occurrences, or claims giving rise to liability, be in excess of the price paid
by the purchaser for the Chonghan Wireless product.
Copyright
© 2010-2018 Chonghan Co., Ltd. All rights reserved.
Trademarks
"Chonghan®" is filed or registered trademark of Chonghan Co., Ltd. in P.R.China and/or in
other countries.
Windows® is a registered trademark of Microsoft Corporation.
QUALCOMM® is a registered trademark of QUALCOMM Incorporated. Used under license.
Other trademarks are the property of the respective owners.
Contact Information
Company Chonghan Co., Ltd.
Sales Desk
Phone
[phone]
Hours 8:30 AM to 6:00 PM GMT+8
Email [email protected]
FAX [phone] x 805
Post Floor 2,Building 14,Nangang First Industrial Area, Songbai Road, Nanshan
District, Shenzhen, Guangdong, China (518000)
Web http://www.szchonghan.com/

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Contents
Important Notice...............................................................................................................................3
Safety and Hazards............................................................................................................................3
Limitations of Liability .......................................................................................................................3
Copyright...........................................................................................................................................4
Trademarks........................................................................................................................................4
Contact Information..........................................................................................................................4
Contents ............................................................................................................................................5
1. Overview ...................................................................................................................................7
1.1. Document History .........................................................................................................7
1.2. References.....................................................................................................................7
1.3. Abbreviations ................................................................................................................7
1.4. Products List..................................................................................................................8
1.5. Presentation Rules ........................................................................................................8
1.6. AT Command Syntax......................................................................................................8
2. Introduction ..............................................................................................................................8
2.1. Features.........................................................................................................................9
2.2. Application ....................................................................................................................9
3. Device Connection ....................................................................................................................9
4. Commonest Command ...........................................................................................................11
5. Dialing the telephone extension number ...............................................................................12
6. TTS Local speech broadcast.....................................................................................................12
6.1. UCS2 Encoding ............................................................................................................12
6.2. GBK GB2312 Encoding.................................................................................................12
7. TTS Remote speech broadcast ................................................................................................13
7.1. UCS2 Encoding ............................................................................................................13
7.2. GBK GB2312 Encoding.................................................................................................13
8. Record .....................................................................................................................................13
9. SMS Function ..........................................................................................................................14
9.1. GSM/GPRS SMS Function............................................................................................14
9.1.1. GSM/GPRS Message Relate Command ...........................................................14
9.1.2. GSM/GPRS Query SMS Center ........................................................................14
9.1.3. GSM/GPRS ASCII Message...............................................................................14
9.1.4. GSM/GPRS PDU Message................................................................................15
9.1.5. GSM/GPRS Send short letter...........................................................................15
9.1.6. GSM/GPRS Receive SMS..................................................................................17
9.1.7. GSM/GPRS Receive SMS Indication.................................................................17
9.1.8. GSM/GPRS Receive SMS auto display .............................................................17
9.2. SMS Process ................................................................................................................18
10. CSD ..................................................................................................................................18
10.1. Relate Command.....................................................................................................18
10.1.1. Modem Initial Command ................................................................................18

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10.1.2. Server Initial ....................................................................................................18
10.1.3. Client Dial A Data Call......................................................................................18
10.1.4. Server Manual Answer ....................................................................................18
10.1.5. Communication Operate Command ...............................................................19
10.1.6. Hang Up...........................................................................................................19
11. Reboot.............................................................................................................................19
12. Three-view Drawing ........................................................................................................19
13. Product List......................................................................................................................19

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1. Overview
This user guide describes the CH-M4 series wireless modem. The aim of the manual is to ease
the test, install and disposition.
Note: Though all features are documented in this manual, new features
may still be in beta stage at publication and therefore may not yet be
validated. Please refer to the Customer Release Note for complete and
detailed information regarding beta and validated features at time of
release.
1.1.
Document History
Version Date Comments Author
1.00 2018-01-02 Initial Release Version. Cai Jinyong
1.2.
References
CHONGHAN CHM3WIRELESS MODEM QUICKSTART ENG
1.3.
Abbreviations
abbr. Full name
APN Access Point Name
DAC Digital Analog Converter
GGSN Gateway GPRS Support Node
GPRS General Packet Radio Service
IP Internet Protocol
KB Kilobyte
MCC Mobile Country Code
MNC Mobile Network Codes
MS Mobile Station
PDU Protocol Data Unit
PLMN Public Land Mobile Network
RSSI
Received Signal Strength Indication
SMA Small Adapter
SMS Short Message Services

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1.4.
Products List
Product
Description
CH-M3G2M6 GPRS GSM850,EGSM900,DCS1800,PCS1900 RS232/RS485/TTL
1.5.
Presentation Rules
The AT commands ignore case. For recognizable, the lowercase for input and uppercase for
respond. For example:
at<CR> // input command
OK // device response
The send mode support all character send and receive, other mode only below valid:
Type Value Describe
Printable 0x20 ~ 0xFE <0x20> … <0xFE>
Carriage Return 0x0D <CR>
Line Feed 0x0A <IF>
transmit 0x1A <CTRL+Z>
Escape 0x1B <ESC>
1.6.
AT Command Syntax
at+xxx=?<CR> // returns the list of parameters and value
ranges
at+xxx=<…><CR> // sets user-definable parameter values
at+xxx?<CR> // returns the currently set value
at+xxx<CR> // execution command
Note: the AT command not case-sensitive, prefix by at and terminate by
<CR>.
2. Introduction
With the development of wireless communication technologies, wireless products are being
adopted in numerous industrial and civilian fields. Shenzhen Chonghan Co., Ltd. a leader of wireless
communication equipment manufacturer releases the CH-M4 Series Wireless Modems, which
support various frequency bands of GPRS, and provide industrial terminal solutions for 2.5G/2.75G
communication. As a wireless modem, it support AT command set via RS-232/RS-485 interface.
CH-M4 series wireless modem adopts industrial level modules, specially designed for the
complicated industrial environment which compatible with EMC, and will be your best choose of

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wireless communication.
2.1.
Features
AT command interface
Support GPRS
Support Voice, SMS and CSD
Dial up, data communication
Support APN or VPDN
LED: power, ring, data
Interface level: RS232/RS485/TTL
Watchdog(software and hardware)
Steel shell for anti-electromagnetic interference
2.2.
Application
Remote Data Monitor and Control
Water, gas and oil flow metering
AMR (automatic meter reading)
Power station monitoring and control
Remote POS (point of sale) terminals
Traffic signals monitor and control
Fleet management
Power distribution network supervision
Central heating system supervision
Weather station data transmission
Hydrologic data acquisition
Vending machine
Traffic info guidance
Parking meter
Telecom equipment supervision (Mobile base station, microwave or optical relay station)
Oil field data acquisition
Warehouse supervision
3. Device Connection
LED Description
Power Flash Running

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DATA FLASH Access network
Interface Description
Antenna
50Ω/SMA/Female
SIM 3.3V/1.8V
Power Φ5.5mm/2.5mm, 5~48V ( suggest 12V )
Serial Port Terminal
Interface Description
1
Input power supply (5-48V)
2GND
3GND
4Reset (5s Low level effective)
5 RX-RS232
6 TX-RS232
7 RS485-A
8 RS485-B
Assemble the antenna, power adapter, connect the modem to PC via RS-232 serial cable, open
the back cover, insert SIM/UIM card, at last, power on.
Note: Don’t insert or remove the SIM/UIM card in the power on status.
Open SSCOM .Click the send instruction in turn. Note: there is a return value and
then the next instruction operation.

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Note: the Chonghan Wireless Modem port properties factory default is
115200/8/n/1/0, as above picture.
4. Commonest Command
AT<CR> // return OK
AT&F<CR> // restore Modem parameters to factory
DEFAULT
ATZ <CR> // loads user profile
AT&W<CR> // save parameters
AT+CSQ<CR> // signal query
AT+CXXCID<CR> // display card ID
AT+CREG?<CR> // verify the network registration status
AT+IPR? <CR> // query device baud rate
AT+IPR=115200<CR> // baud rate setting, support
115200/57600/38400/19200/9600/4800/2400/1200
ATD13612345678;<CR> // voice call
ATD13612345678<CR> // data call
ATA<CR> // incoming call answer
+++ // switch data mode to command mode
ATO<CR> // switch command mode back to data mode
ATH<CR> // hang up

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5. Dialing the telephone extension number
Dialing：075526458200，Extension number：801
ATD075526458200;<CR> // Dialing
OK // Return value
+CLCC: 1,0,2,0,0,"075526458200",129,""// Call state
+CLCC: 1,0,3,0,0,"075526458200",129,""// Ringing
+CLCC: 1,0,0,0,0,"075526458200",129,""// Receiving state
AT+VTS=8<CR> // Dial the extension number
OK // Return value
AT+VTS=0<CR> // Dial the extension number
OK // Return value
AT+VTS=1<CR> // Dial the extension number
OK // Return value
+CLCC: 1,0,6,0,0,"075526458200",129,""// Hang up
Note: call the extension command delay 1s to execute the next command
6. TTS Local speech broadcast
6.1.
UCS2 Encoding
AT&F<CR> // Reset
OK // Return value
ATE0<CR> // Turn off echo
OK // Return value
AT&W // Save the parameters
OK //Return value
AT+CTTS=1, "6B228FCE4F7F75288BED97F3540862107CFB7EDF"<CR>
//text in UCS2 coding format，context of the
text is “欢迎使用语音合成系统”
OK // Return value
+CTTS: 0 // Voice playback ends
6.2.
GBK GB2312 Encoding
AT&F<CR> // Reset
OK // Return value
ATE0<CR> // Turn off echo
OK // Return value
AT&W // Save the parameters
OK //Return value
AT+CTTS=2,"hello，欢迎使用语音合成系统"<CR>
//text in ASIIC coding format.Chinese in GBK
coding format.
OK // Return value
+CTTS: 0 // Voice playback ends

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7. TTS Remote speech broadcast
7.1.
UCS2 Encoding
AT&F<CR> // Reset
OK // Return value
ATE0<CR> // Turn off echo
OK // Return value
AT+CLCC=1<CR> // Output the call status
OK // Return value
AT&W // Save the parameters
OK //Return value
ATD13612345678;<CR> // Make a voice call
OK // Return value
+CLCC: 1,0,2,0,0,"13612345678",129,"" // Call status
+CLCC: 1,0,3,0,0,"13612345678",129,"" // Ringing state
+CLCC: 1,0,0,0,0,"13612345678",129,"" // Answer state
AT+CTTS=1, "6B228FCE4F7F75288BED97F3540862107CFB7EDF"<CR>
//text in UCS2 coding format，context of the
text is “欢迎使用语音合成系统”
OK
+CTTS: 0 // Voice playback ends
+CLCC: 1,0,6,0,0,"13612345678",129,"" // hang up
7.2.
GBK GB2312 Encoding
AT&F<CR> // Reset
OK // Return value
ATE0<CR> // Turn off echo
OK // Return value
AT+CLCC=1<CR> // Output the call status
OK // Return value
AT&W // Save the parameters
ATD13612345678;<CR> // Make a voice call
OK // Return value
+CLCC: 1,0,2,0,0,"13612345678",129,"" // Call status
+CLCC: 1,0,3,0,0,"13612345678",129,"" // Ringing state
+CLCC: 1,0,0,0,0,"13612345678",129,"" // Answer state
AT+CTTS=2,"hello，欢迎使用语音合成系统"<CR> //text in ASIIC coding format.Chinese in
GBK coding format.
OK
+CTTS: 0 // Voice playback ends
+CLCC: 1,0,6,0,0,"13612345678",129,"" // hang up
8. Record
AT+CREC=1,1,0<CR> // Start recording. Value representation:
command, first, audio format
OK // Return value
AT+CREC=2<CR> // Stop recording

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OK // Return value
+CREC: 2,1,0,5,7270 // Value representation: command, first,
audio format, time, content length
AT+CREC=3,1<CR> // Delete the recording. Value
representation: command, first
OK // Return value
AT+CREC=4,1,0,80<CR> // Play the tape. Value representation:
command, first, audio format, volume
OK // Return value
AT+CREC=5<CR> // Stop playing
+CREC: 0 // Return value
OK // Return value
AT+CREC=7<CR> // Audio list
+CREC: 7,1,7846,0 // First
+CREC: 7,2,16230,0 // Second
OK // Return value
9. SMS Function
9.1.
GSM/GPRS SMS Function
The follow section fit for : GSM/GPRS/LTE series modem.
9.1.1. GSM/GPRS Message Relate Command
AT+CMGF=1<CR> // setting ASCII mode
AT+CMGL="ALL"<CR> // query the SMS list
AT+CMGR=N<CR> // read the SMS, location value is n
AT+CMGD=N<CR> // delete the SMS, location value is n
9.1.2. GSM/GPRS Query SMS Center
AT+CSCA?<CR> // query the SMS center number which auto get
from network
+CSCA : "[phone]" , 145
OK
9.1.3. GSM/GPRS ASCII Message
AT+CSCS="GSM"<CR> // setting SMS character set
OK
AT+CMGF=1<CR> // setting SMS format
OK
AT+CMGS="13691978232"<CR> // destination number
> www.szchonghan.com→// message by ASCII sets, terminate character
"→" means CTRL+Z(0X1A)
+CMGS：xxx // message stamp
OK

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Note: if no message stamp return, please resend the message again
9.1.4. GSM/GPRS PDU Message
AT+CSCS="UCS2"<CR> // setting SMS character set
OK
AT+CMGF=0<CR> // setting SMS format
OK
AT+CMGS=26<CR> // PDU length ( Byte ), exclude the initial
"00" and terminate character <0x1a>
>0031000B813196918732F20008A70C004100420043004400310032<0x1A>
// Unicode code, content "ABCD12", end by
(0X1A)
+CMGS：xxx // respond message reference
OK
Note: if no message stamp return, please resend the message again
PDU simple description
Type Initial Destination Ext Length Content
Sample 0031000B81 3196918732F2 0008A7 0C 0041 0042 0043 0044 0031
0032
9.1.5. GSM/GPRS Send short letter
AT+CSCS="UCS2"<CR> // Set SMS coding
OK // Return value
AT+CMGF=0<CR> // Set Unicode mode
OK // Return value
AT+CMGS=132<CR> // PDU coding length
>0051000B813196918732F20008A7760500032302014e1c98ce591c653e82b153436811ff0c66f4
5439843dff0c661f598296e830025b9d9a6c96d58f6699996ee18def300251e47bab58f052a8ff0
c738958f651498f6cff0c4e00591c9c7c9f99821e300286fe513f96ea67f39ec491d17f15ff0c7b
118bed76c876c86697999953bb3002<0x1A>
// The content of the message "input
Unicode encoding the fireworks thousand trees, more trees, stars like rain. BMW
carving. Fung sound, its full light, night ichthyosaurs dance. Chongchong
golden thread, laughter floats to." The terminator is (0X1A)
+CMGS：NNN // The return value, NNN serial number
OK // Return value
AT+CMGS=68<CR> // PDU coding length
>0051000B813196918732F20008A7360500032302024f1791cc5bfb4ed65343767e5ea6ff0c84e6
713656de9996ff0c90a34eba53745728ff0c706f706b961173ca59043002<0x1A>
// The content of the message
"Unicode encoding the input he found the degreeses, suddenly look back, that
person but in the lights dim." The terminator is (0X1A)
Simple description of PDU encoding
Type Initial Destination Ext User information coding length
Sample 0051000B81 3196918732F2 0008A7 76

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Type SMS merge protocol identifier Unicode
User
inform
ation
coding
05
Length
of
protoc
ol
header
00
Split
SMS
logo
03
Length
of data
element
23
Used to
merge
two text
message
s
02
A total of
two
01
This is
the
first
4e1c98ce591c653e8
2b153436811ff0c66f
45439843dff0c661f5
98296e830025b9d9a
6c96d58f6699996ee
18def300251e47bab
58f052a8ff0c738958f
651498f6cff0c4e005
91c9c7c9f99821e300
286fe513f96ea67f39
ec491d17f15ff0c7b1
18bed76c876c86697
999953bb3002
Mobile phone number: F encoding end number string pairs filled digital, 22 character change
position.
The above examples show the target mobile phone number 13691978232 sends content to spend
the night of Dongfeng, more trees, stars like rain. BMW carving. Fung sound, its full light, night
ichthyosaurs dance. Chongchong golden thread, laughter floats to.".
PDU length: does not contain the initial 00 and the final <0x1a>, and then divided by the number
of examples in the case of 132, the number of the.
User information coding length: in the example, the message merge protocol identifies a length of
6 + Unicode with a length of 112 and a length equal to about $118, so it is written to be 76.
Simple description of PDU encoding
Type Initial Destination Ext User information coding length
Sample 0051000B81 3196918732F2 0008A7 36
Type SMS merge protocol identifier Unicode
User
inform
ation
coding
05
Length
of
protoc
ol
header
00
Split
SMS
logo
03
Length
of data
element
23
Used to
merge
two text
message
s
02
A total of
two
02
This is
the
second
4f1791cc5bfb4ed653
43767e5ea6ff0c84e6
713656de9996ff0c90
a34eba53745728ff0c
706f706b961173ca5
9043002

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Mobile phone number: F encoding end number string pairs filled digital, 22 character change
position.
The above examples show the target mobile phone number 13691978232 to send the contents of
"he found the degreeses, suddenly look back, that person but in the lights dim.".
PDU length: does not contain the initial 00 and the final <0x1a>, and then divided by the number
of examples in the case of 68, the number of the.
User information coding length: in the example, the message merge protocol identifies a length of
6 + Unicode with a length of 48 and a length equal to about $54, so it is written to be 36.
9.1.6. GSM/GPRS Receive SMS
AT+CPMS=MT,MT,MT<CR> // Preferred SMS message storage
OK
9.1.7. GSM/GPRS Receive SMS Indication
AT+CNMI=2,1<CR> // New SMS message indications setting
OK
+CMTI : "MT",1 // New SMS message indications
AT+CMGR=1<CR> // read SMS
+CMGR: 0, 23
544651984165416511515…
9.1.8. GSM/GPRS Receive SMS auto display
AT+CSMS=1<CR> // Select Message Service
+CSMS: 1, 1, 1
OK
AT+CNMI=2,2<CR> // New SMS message indications setting
OK
+CMT : "+86138*******", ,"04/06/26" // auto display the new SMS
HELLO
AT+CNMA<CR> // acknowledge an incoming message
OK

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9.2.
SMS Process
10. CSD
10.1.
Relate Command
10.1.1. Modem Initial Command
AT&F<CR> // restore parameters
AT+IPR=115200<CR> // setting fixed baud rate
AT&W<CR> // parameter save
10.1.2. Server Initial
ATS=2<CR> // auto answer after 2 ring received.
10.1.3. Client Dial A Data Call
ATD<DN>;<CR> // data call without ";", and [DN] is the CSD
server number
10.1.4. Server Manual Answer
ATA<CR> // manual answer

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10.1.5. Communication Operate Command
+++ // terminal data transfer, back to the
command mode
ATO<CR> // switch command mode to data transfer mode
10.1.6. Hang Up
ATH<CR> // hang up the data channel
11. Reboot
AT+CFUN=1,1<CR> // reboot device
12. Three-view Drawing
13. Product List
Name Unit Quantity Describe Picture

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CH-M4
(Serial type)
Item 1 Device
DB-9 Item 1 Standard
Supply
Yellow line:RX
Red line:TX
Black:GND
Antenna Item 1 Standard
Supply