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2017-8-1
Chonghan CH-M1 Wireless Modem User manual Chonghan Wireless Modem Series
User manual
Cai Jinyong
CHONGHAN CO., LTD.
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CHONGHAN CH-M1 WIRELESS MODEM USER MANUAL
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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 PARTY.
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
© 2010-2017 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 +86 (0755) 26458200 Hours 8:30 AM to 6:00 PM GMT+8 Email sales@szchonghan.com FAX +86 (0755) 26485200 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 ..................................................................................................................... 8 1.3. Abbreviations ................................................................................................................ 8 1.4. Products List .................................................................................................................. 8 1.5. Presentation Rules ........................................................................................................ 9 1.6. AT Command Syntax ...................................................................................................... 9
2. Introduction .............................................................................................................................. 9 2.1. Features ......................................................................................................................... 9 2.2. Application .................................................................................................................. 10
3. Device Connection .................................................................................................................. 10 4. Commonest Command ........................................................................................................... 14 5. SMS Function .......................................................................................................................... 14
5.1. GSM/GPRS SMS Function ............................................................................................ 14 5.1.1. GSM/GPRS Query SMS Center ........................................................................ 14 5.1.2. GSM/GPRS ASCII Message ............................................................................... 14 5.1.3. GSM/GPRS PDU Message ................................................................................ 15 5.1.4. GSM/GPRS Message Relate Command ........................................................... 15 5.1.5. GSM/GPRS Receive SMS .................................................................................. 15
5.2. CDMA SMS Function ................................................................................................... 16 5.2.1. CDMA Send ASCII SMS .................................................................................... 16 5.2.2. CDMA Send Unicode SMS ............................................................................... 16 5.2.3. CDMA Commonest SMS Command ................................................................ 16 5.2.4. CDMA Receive SMS ......................................................................................... 16
5.3. SMS Process ................................................................................................................ 17 6. Dial Up ..................................................................................................................................... 17
6.1. Phone and Modem Option4........................................................................................ 18 6.2. Setting the 19200 Modem .......................................................................................... 21 6.3. Add Connection ........................................................................................................... 23 6.4. Dial Up ......................................................................................................................... 29 6.5. APN/VPDN Setting ....................................................................................................... 30
6.5.1. GPRS APN Setting ............................................................................................ 30 6.5.2. VPDN Setting ................................................................................................... 31
7. CSD .......................................................................................................................................... 31
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7.1. Relate Command ......................................................................................................... 31 7.1.1. Modem Initial Command ................................................................................ 31 7.1.2. Server Initial .................................................................................................... 31 7.1.3. Client Dial A Data Call ...................................................................................... 32 7.1.4. Server Manual Answer .................................................................................... 32 7.1.5. Communication Operate Command ............................................................... 32 7.1.6. Hang Up ........................................................................................................... 32
8. Reboot ..................................................................................................................................... 32 9. Three-view Drawing ................................................................................................................ 33 10. Hardware Watchdog ....................................................................................................... 33 11. Product List...................................................................................................................... 34 12. Appendix ......................................................................................................................... 35
12.1Appendix A:WIN driver installation .................................................................................. 35 12.2Appendix B:MAC OS driver installation ............................................................................ 39 12.3 Appendix C:Android driver installation ........................................................................... 42
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1. Overview
This user guide describes the M1 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 2010-09-03 Initial Release Version. Samuel 1.01 2010-09-06 Update the references. Samuel 1.02 2010-09-07 Fix the DC plug describe. Samuel 1.03 2010-12-22 Modify the contact information. Samuel 1.04 2010-12-24 Modify the products list. Samuel 1.05 2011-02-14 Modify the copyright information. Samuel 1.06 2011-05-24 Modify the accessories information. Samuel 1.07 2011-05-27 Modify the SMS service center address command. Samuel 1.08 2011-09-28 Modify the received SMS description. Samuel 1.09 2012-01-09 Update the product list.
Add data interface description. Samuel
1.10 2012-07-18 Fix the SMS indicate description Samuel 1.11 2012-09-18 Update the product list Samuel 1.12 2013-03-08 Update the product list Samuel 1.13 2013-03-13 Add CH-M1C1H11
Remove CH-M1C1H7 CH-M1G2C1 Samuel
1.14 2013-09-13 Update PDU example Samuel 1.15 2013-09-25 Fix hardware watchdog description Samuel 1.16 2014-02-14 Add reboot command Samuel 1.17 2014-07-28 Update PDU example Samuel 1.18 2015-10-20 Change contact Cai Jinyong 1.19 2015-12-08 Increase appendix Cai Jinyong 1.20 2016-05-16 Change address Cai Jinyong 1.21 2016-05-27 Add accessories list Cai Jinyong 1.22 2016-07-21 CH-M1C1Z12 Chinese SMS command modification Lei Dong 1.23 2016-08-12 MODEM SMS CDMA message to send and receive Lei Dong
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changes 1.24 2017-05-10 Delete the old model Lei Dong 1.25 2017-06-20 Change the pictures Lei Dong 1.26 2017-08-01 Newly added SMS Process Cai jinyong
1.2. References
CHONGHAN CHM1 WIRELESS MODEM QUICKSTART ENG CHONGHAN CHM1G2S2 GPRS MODEM DATASHEET ENG CHONGHAN CHM1G2Z13 GPRS MODEM DATASHEET ENG CHONGHAN CHM1C1H11 CDMA MODME DATASHEET 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
1.4. Products List
Product Description M1G2S2
GPRS EGSM 900MHz DCS 1800MHz
-25°C - +70°C 90% RS232/RS485/TTL/USB
M1C1Z12 CDMA 800MHz -30°C - +75°C 95% RS232/ RS485/TTL/USB M1C1H11 -30°C - +75°C 95% RS232/RS485/TTL/USB
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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-M1 Series Wireless Modems, which support various frequency bands of GSM/GPRS/CDMA2000 1X, 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/TTL interface.
CH-M1 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 wireless communication.
2.1. Features
AT command interface Support GSM(GPRS)/CDMA2000 1X
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Support Voice, SMS and CSD Dial up, data communication(except CH-M1G1) Support APN or VPDN(except CH-M1G1) LED: power, ring, data Interface level: RS232/RS485/TTL/USB 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 ON boot
FLASH running Ring ON boot
FLASH incoming call Data ON boot
FLASH data transfer
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Interface Description Antenna 50Ω/SMA/Female SIM 3.3V/1.8V Power Φ5.5mm/2.5mm, 5~25V ( suggest 12V ) Serial Port DB9
Data Interface PIN RS-232 RS-485
1 DCD (Power for Option) NC (Power for Option) 2 TXD B 3 RXD A 4 DTR NC 5 GND GND 6 DSR NC 7 CTS NC 8 RTS NC 9 RI NC
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 the Hyper Terminal Windows start menuall programsAccessoriesCommunicationsHyper Terminal
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Enter the name of the connection.
Choose the communication port.
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Setting the port properties.
Note: the Chonghan Wireless Modem port properties factory default is 115200/8/n/1/0, as above picture.
After setting, the Hyper Terminal window as above. Click call button, the Hyper Terminal is ready for operate.
Port parameters
Property Disconnect Call
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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
5. SMS Function
5.1. GSM/GPRS SMS Function
The follow section fit for : GSM/GPRS series modem.
5.1.1. GSM/GPRS Query SMS Center
AT+CSCA?<CR> // query the SMS center number which auto get from network
+CSCA : "+8613800755500" , 145 OK
5.1.2. 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
5.1.3. 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
10位 3196918732F2 12
0008A7 6
0C 12
0041 0042 0043 0044 0031 0032
5.1.4. 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
5.1.5. GSM/GPRS Receive SMS
AT+CPMS=MT,MT,MT<CR> // Preferred SMS message storage OK
5.1.5.1. 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…
5.1.5.2. GSM/GPRS Receive SMS auto display
AT+CSMS=1<CR> // Select Message Service
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+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
5.2. CDMA SMS Function
5.2.1. CDMA Send ASCII SMS
AT+ZMSGL=1,2<CR> // ASCII mode OK AT+CMGS="13691978232"<CR> // destination mobile number www.szchonghan.com<CTRL+Z> // SMS content +CMGS:1 OK +ZCORG: +ZCCNT:3,6 +CDS: 2,1,"13691978232",129,"07/08/02,11:28:40","09/08/02,11:28:45",32768 +ZCEND:29
5.2.2. CDMA Send Unicode SMS
AT+ZMSGL=6,4<CR> // setting Unicode mode OK AT+CMGS="13691978232"<0XOD> // destination <0x0041><0x0042><0x0043><0x0044><0x001A> // "ABCD" and end character +CMGS:1 OK +ZCORG: +ZCCNT:3,6 +CDS: 2,1,"13691978232",129,"07/08/02,11:28:40","09/08/02,11:28:45",32768 +ZCEND:29
5.2.3. CDMA Commonest SMS Command
AT+CMGL="ALL"<CR> // list SMS AT+CMGR=N<CR> // read SMS, location value is n AT+CMGD=N<CR> // delete SMS, location value is n
5.2.4. CDMA Receive SMS
AT+CNMI=2,1,1,1,0<CR> // setting new SMS notification OK +ZCANS:3 +ZCCNT:3,14 +CMTI: "MT",0 +ZCEND:25
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AT+CNMI=2,2,1,1,0<CR> // setting new SMS auto display OK +ZCANS:3 +ZCCNT:3,14 +CMT:"13360504647","07/08/02,03:02:00",129,1,2,0,5 ABCD +ZCEND:25
5.3. SMS Process
6. Dial Up
Follow is the dial up instance, use the Windows XP environment.
Note: CH-M1G1 GSM Modem do not support the dial up function.
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6.1. Phone and Modem Option4
My ComputerControl PanelPhone and Modem Options
Modem tabAdd
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Select "Don’t detect my modem, I will select it from a list"
Select Standard 19200 bps Modem
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Select port COM1
Finish.
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6.2. Setting the 19200 Modem
Open the standard 19200 bps Modem properties
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Tab "Modem", change the maximum port speed to 115200
Open tab "Diagnostics", Query Modem for detect the modem status.
Open tab "Advanced", fill the extra initialization commands
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Type Extra initialization command GPRS Modem AT+CGDCONT=1,"IP","CMNET" CDMA Modem AT&D2
(GPRS Modem)
(CDMA Modem)
6.3. Add Connection
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Open the Network Connections
Create a new connection
Click next
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Choose connect to the internet
Set up my connection manually
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Connect using a dial-up modem
Type the name of connection
(GPRS Modem)
(CDMA Modem)
Input the ISP phone number, "*99***1#" for GPRS and "#777" for CDMA
Select the account
(GPRS Modem)
(CDMA Modem)
Type the ISP account name and password, "WAP"/"WAP" for GPRS in the China Mobile and "card"/"card" for CDMA in the China Telecom.
Finish.
(GPRS Modem)
(CDMA Modem)
Open the dial-up connection, click properties.
(GPRS Modem)
(CDMA Modem)
Click configure
Chang the maximum speed to 115200
6.4. Dial Up
(GPRS Modem)
(CDMA Modem)
Click Dial, then the connection will establish automatically.
6.5. APN/VPDN Setting
6.5.1. GPRS APN Setting
This setting is only for GPRS modem. The APN is special parameter provide by ISP. Follow is a sample by China Mobile, which APN is "CMNET" AT+CGDCONT=1,"IP","CMNET"
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6.5.2. VPDN Setting
This setting is only for CDMA modem. The VPDN have special user name and password, which provide by the ISP. The follow sample is provided by China Telecom.
7. CSD
7.1. Relate Command
7.1.1. Modem Initial Command
AT&F<CR> // restore parameters AT+IPR=115200<CR> // setting fixed baud rate AT&W<CR> // parameter save
Note: n=0/300/600/1200/2400/4800/9600/14400/28800/38400/57600/115200(the CH-M1G1S1-100/CH-M1G2S2-100 factory default baud rate is 0(auto detect), and other types factory default baud rate is 115200)
7.1.2. Server Initial
ATS=2<CR> // auto answer after 2 ring received.
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7.1.3. Client Dial A Data Call
ATD<DN>;<CR> // data call without ";", and [DN] is the CSD server number
7.1.4. Server Manual Answer
ATA<CR> // manual answer
7.1.5. Communication Operate Command
+++ // terminal data transfer, back to the command mode
ATO<CR> // switch command mode to data transfer mode
7.1.6. Hang Up
ATH<CR> // hang up the data channel
8. Reboot
AT+CFUN=1,1<CR> // reboot device
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9. Three-view Drawing
10. Hardware Watchdog
Time out K1 K2 ∞ Open Open 15 min Open Close
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30 min Close Open 5 min Close Close
K3 Describe RG Shortcut Monitor receive GT Shortcut Reserve Empty Reserve
11. Product List
Name Unit部件 Quantity Describe Picture CH-M1 (Serial type)
Item 1 Device
Power Adapter Item 1 DC 12V1A
DB-9 Cable Item 1 Standard Supply
Antenna Item 1 Standard Supply
Name Unit Quantity Describe Picture
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CH-M1 (USB type)
Item 1 Device
USB data line Item 1 Three head data line
Antenna Item 1 Standard Supply
12. Appendix
12.1Appendix A:WIN driver installation
1. Check the driver is installed, if no, Controller USB-Serial for the following image identification.
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2. http://www.szchonghan.com/download/PL2303_Prolific_DriverInstaller_v1.12.0.zip,Click
download driver. 3. Extract files, open the folder, double-click the .exe file to run.
4. Click "运行".
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5. Please click “下一步”.
6. Click“完成”, To exit the wizard.
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7. Check if the installation is successful, if successful, as shown in the following figure.
12.2
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12.2Appendix B:MAC OS driver installation
1. Download the Mac OS X Universal Binary driver from Prolific website and extract pkg
file:
http://www.szchonghan.com/download/md_PL2303_MacOSX_10.6-10.10_v1.5.1.zip
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2. Click on the driver installer pkg file to run the driver installation process. Click Continue to proceed and follow the succeeding instructions to complete the installation.
3. At the end of the installation, you will need to restart your computer. Close all programs and
click Restart to complete installation and reboot the system.
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4. After rebooting the system, you can now plug the PL-2303 USB-to-Serial adapter or cable to
the USB port. You can first run the System Profile program under the Applications-Utilities folder. Click USB hardware inside System Profile and look for “USB-Serial Controller” or “USB-Serial Controller D”. This means that the hardware device is detected by your Mac computer.
5. You can then proceed to check if the USB serial port device is setup properly. You can run
the Terminal program under Applications-Utilities folder and type the following
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commands: cd /dev
ls tty.usbserial*
You should see the “tty. usbserial ” device which means the USB serial device is already
setup properly. If you try to plug another PL-2303 device, you should also see several
“tty.usbserialx” listed where “x” is the assigned device number similar to Windows
COM port assignment.
6. NOTE: Mac OS may also pop-up a new network interface when it detects a new USB-Serial
Controller device. See next section for more explanation.
12.3 Appendix C:Android driver installation
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1. Power on your Android device (Android 3.2 and above) with USB host support. Only one PL2303 device is supported.
2. Click check on the Android Sample Test program (app_PL2303HXDSimpleTest.app) to
run install.
3. Click Install when prompted to install the Android app.
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4. The PL2303 Android app will start to install.
5. When Application is installed, click OPEN.
6. Plug in the PL2303 USB to Serial device. Click OK when prompted to allow the app to access
the USB device
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7. If the PL2303 USB device is detected, the app will pop out a connected status message. If not,
re-plug the device and click OPEN. Make sure you get a connected pop out message.
8. There are two ways to run the PL2303 Simple Test app: Using Loop back Connector:
i. Plug a loop back connector (TX/RX pins short) to the USB-to-Serial RS232
cable. Set the desired baud rate settings.
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ii. Click Loop back button
iii. Or type the keyboard on the Write box field and click Write button to send
data (TX pin). Click Read Data button to read the data (RX pin).
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Using Null Modem cable and Windows PC and Hyper Terminal program:
i. Plug a serial null modem cable to the PL2303 USB Serial cable and the other end to a RS232 COM port (or another PL2303 USB-Serial cable) of another computer. Run Hyper Terminal program on PC or other serial terminal program and open COM port.
ii. Enter keyboard on Write box field and click Write. Check PC Hyper Terminal program if
data is received. Enter keyboard on Hyper Terminal program and click Read Data button
on Android app to receive data if OK.
To run the Android app again, simply go to Apps folder and look for PL2303HXDSimpeTest app
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