Shenzhen Concox Information Technology Co.,Ltd GPS Tracker Communication Protocol (GT06) ——————————————————————— Copyright This document is copyrighted by Shenzhen Concox Information Technology Co.,Ltd. All rights reserved. Any unauthorized copy or transmission of the document partially or wholly shall be subject to prosecution. GPS Tracker Communication Protocol CONTENT I. COMMUNICATION PROTOCOL .............................................................................................. 5 II. TERMS, DEFINITIONS ............................................................................................................ 5 III. BASIC RULES ......................................................................................................................... 6 IV. DATA PACKET FORMAT ......................................................................................................... 8 4.1.START BIT ............................................................................................................................. 8 4.2.PACKET LENGTH...................................................................................................................... 8 4.3.PROTOCOL NUMBER ................................................................................................................ 8 4.4.INFORMATION CONTENTS ......................................................................................................... 8 4.5.INFORMATION SERIAL NUMBER.................................................................................................. 8 4.6.ERROR CHECK ........................................................................................................................ 8 4.7.STOP BIT............................................................................................................................... 9 V. DETAILS ABOUT DATA PACKET SENT BY SERVER TO TERMINAL ........................................... 10 5.1.LOGIN MESSAGE PACKET ........................................................................................................ 10 5.1.1.Terminal Sending Data Packet to Server………………………………………………………………….…..10 5.1.1.1. Start Bit ............................................................................................................................. 10 5.1.1.2. Packet Length .................................................................................................................... 10 5.1.1.3. Protocol Number ............................................................................................................... 10 5.1.1.4. Terminal ID ........................................................................................................................ 10 5.1.1.5. Information Serial Number ................................................................................................ 10 5.1.1.6. Error Check........................................................................................................................ 10 5.1.1.7. Stop Bit ............................................................................................................................. 10 5.1.2.Server Responds the Data Packet ................................................................................ 10 5.1.2.1. Start Bit ............................................................................................................................. 11 5.1.2.2. Packet Length .................................................................................................................... 11 5.1.2.3. Protocol Number ............................................................................................................... 11 5.1.2.4. Information Serial Number ................................................................................................ 11 5.1.2.5. Error Check........................................................................................................................ 11 5.1.2.6. Stop Bit ............................................................................................................................. 11 5.1.3. Examples ........................................................................................................................... 11 5.2. LOCATION DATA PACKET (COMBINED INFORMATION PACKAGE OF GPS AND LBS) .............................. 12 5.2.1.Terminal Sending Location Data Packet to Server………………………………………………………..12 5.2.1.1. Start Bit ............................................................................................................................. 12 5.2.1.2. Packet Length .................................................................................................................... 12 5.2.1.3. Protocol Number ............................................................................................................... 12 5.2.1.4. Date Time ......................................................................................................................... 12 5.2.1.5. Length of GPS information, quantity of positioning satellites ............................................. 13 5.2.1.6. Latitude ............................................................................................................................. 13 5.2.1.7. Longitude .......................................................................................................................... 13 -1- Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.2.1.8. Speed ................................................................................................................................ 13 5.2.1.9. Course Status .................................................................................................................... 14 5.2.1.10. MCC .................................................................................................................................. 15 5.2.1.11. MNC .................................................................................................................................. 15 5.2.1.12. LAC.................................................................................................................................... 15 5.2.1.13. Cell ID ............................................................................................................................... 15 5.2.1.14. Information Serial Number ................................................................................................ 15 5.2.1.15. Error Check........................................................................................................................ 15 5.2.1.16. Stop Bit ............................................................................................................................. 15 5.2.2. Examples of Packet Sent from Terminal to Server……………………………………………………..15 5.3.ALARM PACKET (COMBINED INFORMATION PACKET OF GPS, LBS AND STATUS) ................................... 16 5.3.1.Server Sending Alarm Data Packet to Server……………………………………………………………..16 5.3.1.1. Start Bit ............................................................................................................................. 16 5.3.1.2. Packet Length .................................................................................................................... 16 5.3.1.3. Protocol Number ............................................................................................................... 16 5.3.1.4. Date Time ......................................................................................................................... 16 5.3.1.5. Length of GPS information, quantity of positioning satellites ............................................. 16 5.3.1.6. Latitude ............................................................................................................................. 16 5.3.1.7. Longitude .......................................................................................................................... 16 5.3.1.8. Speed ................................................................................................................................ 16 5.3.1.9. Status and Course.............................................................................................................. 17 5.3.1.10. MCC .................................................................................................................................. 17 5.3.1.11. MNC .................................................................................................................................. 17 5.3.1.12. LAC.................................................................................................................................... 17 5.3.1.13. Cell ID ............................................................................................................................... 17 5.3.1.14. Terminal Information ........................................................................................................ 17 5.3.1.15. Voltage Level ..................................................................................................................... 17 5.3.1.16. GSM Signal Strength Levels ............................................................................................... 18 5.3.1.17. Alarm/Language ................................................................................................................ 18 5.3.1.18. Information Serial Number ................................................................................................ 18 5.3.1.19. Error Check........................................................................................................................ 18 5.3.1.20. Stop Bit ............................................................................................................................. 18 5.3.1.21. Examples ........................................................................................................................... 19 5.3.2.Server responding alarm data packet to terminal ........................................................ 19 5.3.2.1. Start Bit ............................................................................................................................. 19 5.3.2.2. Packet Length .................................................................................................................... 19 5.3.2.3. Protocol Number ............................................................................................................... 19 5.3.2.4. Serial Number ................................................................................................................... 19 5.3.2.5. Error Check........................................................................................................................ 19 5.3.2.6. Stop Bit ............................................................................................................................. 19 5.3.2.7. Examples ........................................................................................................................... 20 5.3.3.Server responding alarm data address packet to Terminal ........................................... 20 5.3.3.1. Response package in Chinese ............................................................................................ 20 5.3.3.2. Response package in English.............................................................................................. 21 -2- Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.4.HEARTBEAT PACKET (STATUS INFORMATION PACKET) ..................................................................... 23 5.4.1.Terminal Sending Heartbeat Packet to Server……………………………………………………………..23 5.4.1.1. Start Bit ............................................................................................................................. 23 5.4.1.2. Packet Length .................................................................................................................... 23 5.4.1.3. Protocol Number ............................................................................................................... 23 5.4.1.4. Terminal Information ........................................................................................................ 23 5.4.1.5. Voltage Level ..................................................................................................................... 24 5.4.1.6. GSM Signal Strength Levels ............................................................................................... 24 5.4.1.7. Alarm/Language ................................................................................................................ 24 5.4.1.8. Information Serial Number ................................................................................................ 24 5.4.1.9. Error Check........................................................................................................................ 24 5.4.1.10. Stop Bit ............................................................................................................................. 24 5.4.2.Server Responds the Data Packet ................................................................................ 25 5.4.2.1. Start Bit ............................................................................................................................. 25 5.4.2.2. Packet Length .................................................................................................................... 25 5.4.2.3. Protocol Number ............................................................................................................... 25 5.4.2.4. Information Serial Number ................................................................................................ 25 5.4.2.5. Error Check........................................................................................................................ 25 5.4.2.6. Stop Bit ............................................................................................................................. 25 5.4.3.Examples ..................................................................................................................... 25 VI. DATA PACKET SENT FROM SERVER TO TERMINAL ............................................................. 26 6.1.PACKET SENT BY SERVER ......................................................................................................... 26 6.1.1. Start Bit ............................................................................................................................. 26 6.1.2. Packet Length .................................................................................................................... 26 6.1.3. Protocol Number ............................................................................................................... 26 6.1.4. Length of Command .......................................................................................................... 26 6.1.5. Server Flag Bit ................................................................................................................... 26 6.1.6. Command Content ............................................................................................................ 26 6.1.7. Language ............................................................................................. 错误！未定义书签。 6.1.8. Information Serial Number ................................................................................................ 26 6.1.9. Error Check........................................................................................................................ 26 6.1.10. Stop Bit ............................................................................................................................. 26 6.2.PACKET REPLIED BY TERMINAL ................................................................................................. 27 6.2.1. Start Bit ............................................................................................................................. 27 6.2.2. Packet Length .................................................................................................................... 27 6.2.3. Protocol Number ............................................................................................................... 27 6.2.4. Length of Command .......................................................................................................... 27 6.2.5. Server Flag Bit ................................................................................................................... 27 6.2.6. Command Content ............................................................................................................ 27 6.2.7. Language ........................................................................................................................... 27 6.2.8. Information Serial Number ................................................................................................ 27 6.2.9. Error Check........................................................................................................................ 27 6.2.10. Stop Bit ............................................................................................................................. 27 -3- Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 6.3. Looking Up Location Information ....................................................................................... 28 6.4. Cutting Oil and Electricity .................................................................................................. 28 6.5. Connecting Oil and Electricity ........................................................................................... 28 6.6. Address Querying Information Sent by the Server ............................................................. 28 6.7. GPS, Phone Number Querying Address Information Package (0X1A)………………………..30 6.7.1. Information from Terminal to Server ................................................................................. 30 6.7.1.1. Start Bit ............................................................................................................................. 30 6.7.1.2. Packet Length .................................................................................................................... 30 6.7.1.3. Protocol Number ............................................................................................................... 30 6.7.1.4. Date Time ......................................................................................................................... 30 6.7.1.5. Length of GPS information, quantity of positioning satellites ............................................. 30 6.7.1.6. Latitude ............................................................................................................................. 30 6.7.1.7. Longitude .......................................................................................................................... 30 6.7.1.8. Speed ................................................................................................................................ 31 6.7.1.9. Course ............................................................................................................................... 31 6.7.1.10. Phone Number .................................................................................................................. 31 6.7.1.11. Language ........................................................................................................................... 31 6.7.1.12. Information Serial Number ................................................................................................ 31 6.7.1.13. Error Check........................................................................................................................ 31 6.7.1.14. Stop Bit ............................................................................................................................. 31 6.7.2. Response of Server ............................................................................................................ 31 6.7.2.1. Response package in Chinese ............................................................................................ 31 6.7.2.2. Response package in English.............................................................................................. 32 VII. APPENDIX A: CODE FRAGMENT OF THE CRC-ITU LOOKUP TABLE ALGORITHM IMPLEMENTED BASED ON C LANGUAGE ............................................................................................................................................... 35 VIII. APPENDIX B: A FRAGMENT OF EXAMPLE OF DATA PACKET OF COMMUNICATION PROTOCOL ........... 36 IX. APPENDIX C: COMPLETE FORMAT OF THE INFORMATION PACKAGE .................................................. 39 -4Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol i. Communication Protocol Introduction This document defines instructions about interface protocol on application layer of vehicles GPS tracker and location-based service platform. Related interface protocol only applies in the interaction between the platform and the position terminal. ii. Terms, Definitions Terms, Abbreviation CMPP GPS GSM GPRS TCP LBS IMEI MCC MNC LAC Cell ID UDP SOS CRC NITZ GIS Definition in English China Mobile Peer to Peer Global Positioning System Global System for Mobile Communication General Packet Radio Service Transport Control Protocol Location Based Services International Mobile Equipment Identity Mobile Country Code Mobile Network Code Location Area Code Cell Tower ID User Datagram Protocol Save Our Ship/Save Our Souls Cyclic Redundancy Check Network Identity and Time Zone, Geographic Information System Definition in Chinese 中国移动点对点协议 全球卫星定位系统 全球移动通信系统 通用无线分组业务 传输控制协议 辅助定位服务 国际移动设备识别码 移动用户所属国家代号 移动网号码 位置区码 移动基站 用户数据报协议 遇难求救信号 循环冗余校验 时区 地理信息系统 -5Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol iii. Basic Rules 1. If a GPRS connection is established successfully, the terminal will send a first login message packet to the server and, within five seconds, if the terminal receives a data packet responded by the server, the connection is considered to be a normal connection. The terminal will begin to send location information (i.e., GPS, LBS information package). A status information package will be sent by the terminal after three minutes to regularly confirm the connection. 2. If the GPRS connection is established unsuccessfully, the terminal will not be able to send the login message packet. The terminal will start schedule reboot in twenty minutes if the GPRS connection is failed three times. Within twenty minutes, if the terminal successfully connects to the server and receives the data packet from the server as the server‟s response to the login message packet sent by the terminal, the schedule reboot will be off and the terminal will not be rebooted; otherwise, the terminal will be rebooted automatically in twenty minutes. 3. After receiving the login message packet, the server will return a response data packet. If the terminal doesn‟t receive packet from the server within five seconds after sending the login message packet or the status information package, the current connection is regarded as an abnormal connection. The terminal will start a retransmission function for GPS tracking data, which will cause the terminal to disconnect the current GPRS connection, rebuild a new GPRS connection and send a login message packet again. 4. If the connection is regarded to be abnormal, and the data packet as a response from the server is failed to be received three times after a connection is established and a login message packet or status information package is sent, the terminal will start schedule reboot and the scheduled time is ten minutes. Within ten minutes, if the terminal successfully connects to the server and receives the data packet responded by the server, the schedule reboot will be off and the terminal will not be rebooted; otherwise, the terminal will be rebooted automatically in ten minutes. 5. In case of the normal connection, the terminal will send a combined information package of GPS and LBS to the server after the GPS information is changed; and the server may set a default protocol for transmission by using commands. 6. To ensure the effectiveness of the connection, the terminal will send status information to the server at regular intervals, and the server will return response data packets to confirm the connection. 7. For the terminal which doesn‟t register an IMEI number, the server will reply the terminal with a login request response and heartbeat packet response, rather than directly disconnect the connection. (If the connection is directly disconnected or the server doesn‟t reply to the terminal, it will lead to a continuous reconnected by the terminal and the GPRS traffic will be consumed heavily. -6Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol Data Flow Diagram Terminal boot & reboot greater than 20min, terminal reboot less than 20min, reconnect establish GPRS connection? greater than 20 min, reboot reconnection time ? fail successful send login message packet send login data packet to server server reply data which is response to the login packet less than 20min, reconnect the reply data from the server is correct? reconnection time? No backend data server Yes connection is successful alarm status alarm packet location data packet send alarm packet to server heartbeat packet interval of heartbeat packet upload regularly send location data packet to the server interval of uploading the location data send heartbeat data packet to the server fail to receive response from the server within 5min upload regularly yes response of heartbeat packet from the server is normal? No server reply data which is response to the heartbeat packet -7Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol iv. Data Packet Format The communication is transferred asynchronously in bytes. The total length of packets is (10+N) Bytes. Format Length(Byte) Start Bit 2 Packet Length 1 Protocol Number 1 Information Content N Information Serial Number 2 Error Check 2 Stop Bit 2 4.1. Start Bit Fixed value in HEX 0x78 0x78. 4.2. Packet Length Length = Protocol Number + Information Content + Information Serial Number + Error Check, totally (5+N)Bytes, because the Information Content is a variable length field. 4.3. Protocol Number Type Value Login Message 0x01 Location Data 0x12 Status information 0x13 String information 0x15 Alarm data 0x16 GPS, query address information by phone number 0x1A Command information sent by the server to the terminal 0x80 4.4. Information Contents The specific contents are determined by the protocol numbers corresponding to different applications. 4.5. Information Serial Number The serial number of the first GPRS data (including status packet and data packet such as GPS, LBS) sent after booting is „1‟, and the serial number of data sent later at each time will be automatically added „1‟. 4.6. Error Check A check code may be used by the terminal or the server to distinguish whether the received information is error or not. To prevent errors occur during data transmission, error check is added to against data misoperation, so as to increase the security and efficiency of the system. The check code is generated by the CRC-ITU checking method. -8Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol The check codes of data in the structure of the protocol, from the Packet Length to the Information Serial Number (including “Packet Length” and “Information Serial Number”) , are values of CRC-ITU. CRC error occur when the received information is calculated, the receiver will ignore and discard the data packet. 4.7. Stop Bit Fixed value in HEX 0x0D 0x0A. -9Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol v.Details about Data Packet sent by Server to Terminal The commonly used information packages sent by the terminal and those sent by the server will be interpreted separately. 5.1. Login Message Packet 5.1.1. Terminal Sending Data Packet to Server The login message packet is used to be sent to the server with the terminal ID so as to confirm the established connection is normal or not. Description Bits Example Start Bit 2 0x78 0x78 1 0x0D 1 0x01 8 0x01 0x23 0x45 0x67 0x89 0x01 0x23 0x45 2 0x00 0x01 Error Check 2 0x8C 0xDD Stop Bit 2 0x0D 0x0 Packet Length Protocol Login Message Number Packet(18 Terminal ID Byte) Information Serial Number 5.1.1.1. Start Bit For details see Data Packet Format section 4.1. 5.1.1.2. Packet Length For details see Data Packet Format section 4.2. 5.1.1.3. Protocol Number For details see Data Packet Format section 4.3. 5.1.1.4. Terminal ID The terminal ID applies IMEI number of 15 bits. Example: if the IMEI is 123456789012345, the terminal ID is 0x01 0x23 0x45 0x67 0x89 0x01 0x23 0x45. 5.1.1.5. Information Serial Number For details see Data Packet Format section 4.5. 5.1.1.6. Error Check For details see Data Packet Format section 4.6. 5.1.1.7. Stop Bit For details see Data Packet Format section 4.7. 5.1.2. Server Responds the Data Packet Description Bits Example Login Start Bit 2 0x78 0x78 Message Packet Length 1 0x05 - 10 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol Packet (18 Protocol Byte) Number 1 0x01 2 0x00 0x01 Error Check 2 0xD9 0xDC Stop Bit 2 0x0D 0x0A Information Serial Number The response packet from the server to the terminal: the protocol number in the response packet is identical to the protocol number in the data packet sent by the terminal. 5.1.2.1. Start Bit For details see Data Packet Format section 4.1. 5.1.2.2. Packet Length For details see Data Packet Format section 4.2. 5.1.2.3. Protocol Number For details see Data Packet Format section 4.3. 5.1.2.4. Information Serial Number For details see Data Packet Format section 4.5. 5.1.2.5. Error Check For details see Data Packet Format section 4.6. 5.1.2.6. Stop Bit For details see Data Packet Format section 4.7. 5.1.3. Examples Examples of the login message packet sent by the terminal to the server and the response packet sent by the server to the terminal are as follows: (in the examples the terminal ID is 123456789012345. Example of data packet sent by the terminal 78 78 0D 01 01 23 45 67 89 01 23 45 00 01 8C DD 0D 0A Explain 0x78 0x78 0x0D Start Bit Length 0x01 0x01 0x23 0x45 0x67 0x89 0x01 0x23 0x45 Protocol Terminal ID No. 0x00 0x01 Serial No. 0x8C 0xDD Error Check 0x0D 0x0A Stop Bit Example of response packet returned by the server 78 78 05 01 00 01 D9 DC 0D 0A Explain 0x78 0x78 0x05 Start Bit Length 0x01 Protocol No. 0x00 0x01 0xD9 0xDC 0x0D 0x0A Serial No. Error Check Stop Bit - 11 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.2. Location Data Packet (combined information package of GPS and LBS) 5.2.1. Terminal Sending Location Data Packet to Server Length(Byte) Example Start Bit 2 0x78 0x78 Packet Length 1 0x1F Protocol Number 1 0x12 6 0x0B 0x08 0x1D 0x11 0x2E 0x10 1 0xCF Format Date Time Quantity of GPS information GPS satellites Information Latitude 4 0x02 0x7A 0xC7 0xEB Information Longitude 4 0x0C 0x46 0x58 0x49 Content Speed 1 0x00 2 0x14 0x8F MCC 2 0x01 0xCC LBS MNC 1 0x00 Information LAC 2 0x28 0x7D Cell ID 3 0x00 0x1F 0xB8 Serial Number 2 0x00 0x03 Error Check 2 0x80 0x81 Stop Bit 2 0x0D 0x0A Course, Status 5.2.1.1. Start Bit For details see Data Packet Format section 4.1. 5.2.1.2. Packet Length For details see Data Packet Format section 4.2. 5.2.1.3. Protocol Number For details see Data Packet Format section 4.3. 5.2.1.4. Date Time Format Length(Byte) Example Year 1 0x0A Month 1 0x03 Day 1 0x17 Hour 1 0x0F Minute 1 0x32 Second 1 0x17 Example: 2010-03-23 15:30:23 Calculated as follows: 10(Decimal)=0A(Hexadecimal) 3 (Decimal)=03(Hexadecimal) 23(Decimal)=17(Hexadecimal) - 12 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 15(Decimal)=0F(Hexadecimal) 50(Decimal)=32(Hexadecimal) 23(Decimal)=17(Hexadecimal) Then the value is: 0x0A 0x03 0x17 0x0F 0x32 0x17 5.2.1.5. Length of GPS information, quantity of positioning satellites The field is 1 Byte displayed by two hex digits, wherein the first one is for the length of GPS information and the second one for the number of the satellites join in positioning. Example: if the value is 0xCB, it means the length of GPS information is 12 and the number of the positioning satellites is 11. (C = 12Bit Lenght ，B = 11 satellites) 5.2.1.6. Latitude Four bytes are consumed, defining the latitude value of location data. The range of the value is 0-162000000, indicating a range of 0°-90°. The conversion method thereof is as follow: Converting the value of latitude and longitude output by GPS module into a decimal based on minute; multiplying the converted decimal by 30000; and converting the multiplied result into hexadecimal Example: 22º32.7658‟=(22X60+32.7658)X30000=40582974, then converted into a hexadecimal number 40582974(Decimal)= 26B3F3E(Hexadecimal) at last the value is 0x02 0x6B 0x3F 0x3E. 5.2.1.7. Longitude Four bytes are consumed, defining the longitude value of location data. The range of the value is 0-324000000, indicating a range of 0°-180°. The conversion method herein is same to the method mentioned in Latitude (see section 5.2.1.6). 5.2.1.8. Speed One byte is consumed, defining the running Speed of GPS. The value ranges from 0x00 to 0xFF indicating a range from 0 to 225km/h. e.g. 0x00 represents 0 km/h. 0x10 represents 16km/h. 0xFF represents 255 km/h. - 13 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.2.1.9. Course & Status Two bytes are consumed, defining the running direction of GPS. The value ranges from 0°to 360°measured clockwise from north of 0°. Bit7 0 Bit6 0 Bit5 GPS real-time/differential positioning Bit4 GPS having been positioning or not Bit3 East Longitude, West Longitude Bit2 South Latitude, North Latitude BYTE_1 Bit1 Bit0 Bit7 Bit6 Bit5 Course Bit4 BYTE_2 Bit3 Bit2 Bit1 Bit0 Note: The status information in the data packet is the status corresponding to the time bit recorded in the data packet. For example: the value is 0x15 0x4C, the corresponding binary is 00010101 01001100, BYTE_1 Bit7 0 BYTE_1 Bit6 0 BYTE_1 Bit5 0 (real time GPS) BYTE_1 Bit4 1 (GPS has been positioned) BYTE_1 Bit3 0 (East Longitude) BYTE_1 Bit2 1 (North Latitude) BYTE_1 Bit1 0 BYTE_1 Bit0 1 BYTE_2 Bit7 0 BYTE_2 Bit6 1 BYTE_2 Bit5 0 Course 332°(0101001100 in Binary, or 332 in decimal) BYTE_2 Bit4 0 BYTE_2 Bit3 1 BYTE_2 Bit2 1 BYTE_2 Bit1 0 BYTE_2 Bit0 0 which means GPS tracking is on, real time GPS, location at north latitude, east longitude and the course is 332°. - 14 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.2.1.10. MCC The country code to which a mobile user belongs, i.e., Mobile Country Code(MCC). Example: Chinese MCC is 460 in decimal, or 0x01 0xCC in Hex (that is, a decimal value of 460 converting into a hexadecimal value, and 0 is added at the left side because the converted hexadecimal value is less than four digits). Herein the range is 0x0000 ~ 0x03E7. 5.2.1.11. MNC Mobile Network Code(MNC) Example: Chinese MNC is 0x00. 5.2.1.12. LAC Location Area Code (LAC) included in LAI consists of two bytes and is encoded in hexadecimal. The available range is 0x0001-0xFFFE, and the code group 0x0000 and 0xFFFF cannot be used. (See GSM specification 03.03, 04.08 and 11.11). 5.2.1.13. Cell ID Cell Tower ID (Cell ID), which value ranges from 0x000000 to 0xFFFFFF. 5.2.1.14. Information Serial Number For details see Data Packet Format section 4.5. 5.2.1.15. Error Check For details see Data Packet Format section 4.6. 5.2.1.16. Stop Bit For details see Data Packet Format section 4.7. 5.2.2. Examples of Packet Sent from Terminal to Server Example of sending by the terminal 78 78 1F 12 0B 08 1D 11 2E 10 CC 02 7A C7 EB 0C 46 58 49 00 14 8F 01 CC 00 28 7D 00 1F B8 00 03 80 81 0D 0A Explain 0x78 0x78 0x1F 0x12 Packet Protocol Length No. 0x0B 0x08 0x1D 0x11 0x2E 0x10 0xCC 0x02 0x7A 0xC7 0xEB Quantity of GPS Start Bit Date Time Latitude information satellites 0x0C 0x46 0x58 0x49 0x00 Longitude Speed 0x14 0x8F 0x01 0xCC 0x00 0x28 0x7D 0x00 0x1F 0xB8 0x00 0x03 MCC MNC LAC Cell ID Serial No. Course Status 0x80 0x81 0x0D 0x0A Error Check Stop Bit - 15 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.3. Alarm Packet (Combined information packet of GPS, LBS and Status) 5.3.1. Server Sending Alarm Data Packet to Server Format Length (Byte) Start Bit 2 Packet Length 1 Protocol Number 1 Date Time 6 Quantity of GPS information satellites 1 Latitude 4 Longitude 4 Speed 1 Course, Status 2 LBS Length 1 MCC 2 MNC 1 LAC 2 Cell ID 3 Terminal Information Content 1 status Voltage Level 1 Information GSM Signal Strength 1 Alarm/Language 2 GPS Information Information Content LBS Information Serial Number 2 Error Check 2 Stop Bit 2 Alarm packet is consisted by adding status information to location packet, so does the encoding format of the protocol. 5.3.1.1. Start Bit For details see Data Packet Format section 4.1. 5.3.1.2. Packet Length For details see Data Packet Format section 4.2. 5.3.1.3. Protocol Number For details see Data Packet Format section 4.3. 5.3.1.4. Date Time For details see Location Data Packet Format section 5.2.1.4. 5.3.1.5. Length of GPS information, quantity of positioning satellites For details see Location Data Packet Format section 5.2.1.5. 5.3.1.6. Latitude For details see Location Data Packet Format section 5.2.1.6. 5.3.1.7. Longitude For details see Location Data Packet Format section 5.2.1.7. 5.3.1.8. Speed - 16 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol For details see Location Data Packet Format section 5.2.1.8. 5.3.1.9. Status and Course For details see Location Data Packet Format section 5.2.1.9. 5.3.1.10. MCC For details see Location Data Packet Format section 5.2.1.10. 5.3.1.11. MNC For details see Location Data Packet Format section 5.2.1.11. 5.3.1.12. LAC For details see Location Data Packet Format section 5.2.1.12. 5.3.1.13. Cell ID For details see Location Data Packet Format section 5.2.1.13. 5.3.1.14. Terminal Information One byte is consumed, defining various status information of the mobile phone. Bit Code Meaning 1: oil and electricity disconnected Bit7 0: gas oil and electricity connected 1: GPS tracking is on Bit6 0: GPS tracking is off 100: SOS 011: Low Battery Alarm Bit3~ Bit5 BYTE 010: Power Cut Alarm 001: Shock Alarm 000: Normal 1: Charge On Bit2 0: Charge Off 1: ACC high Bit1 0: ACC Low 1: Defense Activated Bit0 0: Defense Deactivated Example: 0x44, corresponding binary value is 01000100, indicates that the status of the terminal is: oil and electricity connected, GPS tracking is on, normal without any alarm, charge on, ACC is low, and defense deactivated. 5.3.1.15. Voltage Level The range is 0~6 defining the voltage is from low to high. 0: No Power (shutdown) 1: Extremely Low Battery (not enough for calling or sending text messages, etc.) 2: Very Low Battery (Low Battery Alarm) 3: Low Battery (can be used normally) 4: Medium 5: High 6: Very High Example: 0x02 indicates very low battery and a Low Battery Alarm is sending. - 17 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.3.1.16. GSM Signal Strength Levels 0x00: no signal; 0x01: extremely weak signal; 0x02: very weak signal; 0x03: good signal; 0x04: strong signal. Example: 0x03 indicates the GSM signal is good. 5.3.1.17. Alarm/Language 0x00 (former bit) 0x01 (latter bit) former bit: terminal alarm status (suitable for alarm packet and electronic fence project) latter bit: the current language used in the terminal 0x00: normal 0x01: SOS 0x02: Power Cut Alarm former bit 0x03: Shock Alarm 0x04: Fence In Alarm 0x05: Fence Out Alarm 0x01: Chinese latter bit 0x02: English Examples: No Alarm and Language is Chinese: 0x00 0x01 No Alarm and Language is English: 0x00 0x02 To increase the reliability of alarm information, labeling the alarm information repeatedly; in most cases, the alarm information keeps consistent with information of former terminal, while the inconsistencies are as follows: A．Low Battery Alarm occurred in the information of the terminal B． Fence in and out Alarm in the Alarm/Language information 5.3.1.18. Information Serial Number For details see Data Packet Format section 4.5. 5.3.1.19. Error Check For details see Data Packet Format section 4.6. 5.3.1.20. Stop Bit For details see Data Packet Format section 4.7. - 18 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.3.1.21. Examples Examples of terminal transmission 78 78 25 16 0B 0B 0F 0E 24 1D CF 02 7A C8 87 0C 46 57 E6 00 14 02 09 01 CC 00 28 7D 00 1F 72 65 06 04 01 01 00 36 56 A4 0D 0A Explain 0x78 0x78 0x25 0x16 0x0B 0x0B 0x0F 0x0E 0x24 x01D 0xCF 0x02 0x7A 0xC8 0x87 Quantity of GPS Protocol Start Bit Length Date Time information Latitude No. satellites 0x0C 0x46 0x57 0xE6 0x00 Longitude Speed 0x65 0x14 0x02 0x09 Course LBS Status Length 0x06 0x04 0x01 0xCC 0x00 0x28 0x7D 0x00 0x1F 0x72 MCC MNC LAC Cell ID 0x01 0x01 0x00 0x36 0x56 0xA4 0x0D 0x0A Alarm/Language Serial No. Error Check Stop Bit Terminal GSM Signal Information Voltage Level Strength Content Note: The status information in the data packet is the status corresponding to the time bit recorded in the data packet. 5.3.2. Server responding alarm data packet to terminal（terminal do not check enforcedly） Format Length(Byte) Start Bit 2 Packet Length 1 Information Protocol Number 1 Content Serial Number 2 Error Check 2 Stop Bit 2 Alarm packet is consisted by adding status information to location packet, so does the encoding format of the protocol. 5.3.2.1. Start Bit For details see Data Packet Format section 4.1 5.3.2.2. Packet Length For details see Data Packet Format section 4.2 5.3.2.3. Protocol Number For details see Data Packet Format section 4.3 5.3.2.4. Serial Number For details see Data Packet Format section 4.5 5.3.2.5. Error Check For details see Data Packet Format section 4.6 5.3.2.6. Stop Bit For details see Data Packet Format section 4.7 - 19 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.3.2.7. Examples Example of data packet responded by the server 78 78 05 16 00 36 95 70 0D 0A 5.3.3. Server responding alarm data address packet to Terminal 5.3.3.1. Response package in Chinese The response data packet in Chinese is as follow: Start Bit 2 Length of data bit 1 Protocol Number 1 Length of Command 1 Server Flag Bit 4 Command ALARMSMS 8 && 2 packet sent from the Information Address server to the M Content Command Content Content && terminal 2 (15+M+N Phone Byte) 21 Number ## 2 Information Serial Number 2 Check Bit 2 Stop Bit 2 The Protocol Number of request Chinese address response is 0X17. Command Content: ADDRESS&&Address Content&&Phone Number(All is 0)## (ADDRESS, &&, ## are fixed strings) Chinese address content is sent in UNICODE. Example of Chinese address response information: 7878 // Start Bit 85 // Data Length 17 // Response Protocol Number 7E // Length of Command, i.e., length of the information of the transmitted content 00000001 // Server Flag Bit 414C41524D534D53 // ALARMSMS 2626 //&& Separator 624059044F4D7F6E0028 // Chinese address is sent in UNICODE 004C004200530029003A - 20 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5E7F4E1C77015E7F5DDE 5E0282B190FD533AFF17 FF15FF144E6190530028 004E00320033002E0033 00390035002C00450031 00310032002E00390038 0038002996448FD1 2626 //&& Separator 00000000000000000000000000000000000000000 // Phone Number 2323 //## terminator of content 0106 // Serial No. 3825 // Check Bit 0D0A // Stop Bit 5.3.3.2. Response package in English Considering the address or other foreign address in English is generally longer than that in Chinese, one data bit is not enough, so the data bit is occupied in 2 bytes. Note: only the length of data bit corresponding to the protocol number of response address information is changed into two bytes. Command Start Bit 2 Length of data bit 2 Protocol Number 1 Length of Command 2 Server Flag Bit 4 packet sent ALARMSMS 8 from the && 2 server to the Information terminal Content (15+M+N Address M Command Content Content && Byte) 2 Phone 21 Number ## 2 Information Serial Number 2 Check Bit 2 Stop Bit 2 The Protocol Number of request English address response is 0X97. Command Content: ADDRESS&&Address Content&&Phone Number(All is 0)##(ADDRESS, &&, ## are fixed strings) - 21 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol Example of English address response information: 7878 // Start Bit 00D2 // Data Length 97 // Response Protocol Number 00CA // Length of Command, i.e., length of the information of the transmitted content 00000001 // Server Flag Bit 414C41524D534D53 // ALARMSMS 2626 //&& Separator 0053004F00530028004C // English address is sent in UNICODE 0029003A005300680069 006D0069006E00200046 0061006900720079006C 0061006E006400200057 00650073007400200052 0064002C004800750069 006300680065006E0067 002C004800750069007A 0068006F0075002C0047 00750061006E00670064 006F006E00670028004E 00320033002E00310031 0031002C004500310031 0034002E003400310031 0029004E006500610072 00620079 2626 //&& Separator 00000000000000000000000000000000000000000 // Phone Number 2323 //## terminator of content 0007 //Serial No. 72b5 // Check Bit 0D0A // Stop Bit - 22 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 5.4. Heartbeat Packet (status information packet) Heartbeat packet is a data packet to maintain the connection between the terminal and the server. 5.4.1. Terminal Sending Heartbeat Packet to Server Format Length (Byte) Start Bit 2 Packet Length 1 Protocol Number 1 Terminal Information 1 Content Information Status Content Information Voltage Level 1 GSM Signal Strength 1 Alarm/Language 2 Serial Number 2 Error Check 2 Stop Bit 2 5.4.1.1. Start Bit For details see Data Packet Format section 4.1. 5.4.1.2. Packet Length For details see Data Packet Format section 4.2. 5.4.1.3. Protocol Number For details see Data Packet Format section 4.3. 5.4.1.4. Terminal Information One byte is consumed defining for various status information of the mobile phone. Bit Code Meaning 1: oil and electricity disconnected Bit7 0: gas oil and electricity 1: GPS tracking is on Bit6 0: GPS tracking is off 100: SOS 011: Low Battery Alarm Bit3~ Bit5 BYTE 010: Power Cut Alarm 001: Shock Alarm 000: Normal 1: Charge On Bit2 0: Charge Off 1: ACC high Bit1 0: ACC Low 1: Defense Activated Bit0 0: Defense Deactivated Example: 0x44, corresponding binary value is 01000100, indicates that the status of the terminal is: oil and electricity connected, GPS tracking is on, - 23 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol normal without any alarm, charge on, ACC is low, and defense deactivated. 5.4.1.5. Voltage Level The range is 0~6 defining the voltage is from low to high. 0: No Power (shutdown) 1: Extremely Low Battery (not enough for calling or sending text messages, etc.) 2: Very Low Battery (Low Battery Alarm) 3: Low Battery (can be used normally) 4: Medium 5: High 6: Very High Example: 0x02 indicates very low battery and a Low Battery Alarm is sending. 5.4.1.6. GSM Signal Strength Levels 0x00: no signal; 0x01: extremely weak signal; 0x02: very weak signal; 0x03: good signal; 0x04: strong signal. Example: 0x03 indicates the GSM signal is good. 5.4.1.7. Alarm/Language 0x00 (former bit) 0x01 (latter bit) former bit: terminal alarm status (suitable for alarm packet and electronic fence project) latter bit: the current language of the terminal former bit 0x01: Chinese latter bit 0x02: English Examples: No Alarm and Language is Chinese: 0x00 0x01 No Alarm and Language is English: 0x00 0x02 5.4.1.8. Information Serial Number For details see Data Packet Format section 4.5. 5.4.1.9. Error Check For details see Data Packet Format section 4.6. 5.4.1.10. Stop Bit - 24 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol For details see Data Packet Format section 4.7. 5.4.2. Server Responds the Data Packet Description Bits Example Start Bit 2 0x78 0x78 Login Packet Length 1 0x05 Message Protocol Number 1 0x01 Packet (18 Information Serial Number 2 0x00 0x01 Byte) Error Check 2 0xD9 0xDC Stop Bit 2 0x0D 0x0A The response packet from the server to the terminal: the protocol number in the response packet is identical to the protocol number in the data packet sent by the terminal. 5.4.2.1. Start Bit For details see Data Packet Format section 4.1. 5.4.2.2. Packet Length For details see Data Packet Format section 4.2. 5.4.2.3. Protocol Number For details see Data Packet Format section 4.3. 5.4.2.4. Information Serial Number For details see Data Packet Format section 4.5. 5.4.2.5. Error Check For details see Data Packet Format section 4.6. 5.4.2.6. Stop Bit For details see Data Packet Format section 4.7. 5.4.3. Examples Example of data packet sent by the terminal 78 78 08 13 4B 04 03 00 01 00 11 06 1F 0D 0A Explain 0x78 0x78 0x08 Start Bit Length 0x13 0x4B 0x04 0x03 0x00 0x01 Protocol 0x00 0x11 0x06 0x1F 0x0D 0x0A Serial No. Error Check Stop Bit Reserved bit Information Content No. (Language) Example of response packet returned by the server 78 78 05 13 00 11 F9 70 0D 0A Explain 0x78 0x78 0x05 0x13 0x00 0x11 0xF9 0x70 0x0D 0x0A Start Bit Length Protocol No. Serial No. Error Check Stop Bit - 25 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol vi. Data Packet Sent From Server to Terminal 6.1. Packet Sent by Server Format Length (Byte) Start Bit 2 Packet length 1 Protocol Number 1 Information Content Length of Command 1 Server Flag Bit 4 Command Content M Information Serial Number 2 Error Check 2 Stop Bit 2 6.1.1. Start Bit For details see Data Packet Format section 4.1. 6.1.2. Packet Length For details see Data Packet Format section 4.2. 6.1.3. Protocol Number The Protocol Number of terminal transmission is 0x80. 6.1.4. Length of Command Server Flag Bit + Length of Command Content Example: measured in bytes, 0x0A means the content of command occupied ten bytes. 6.1.5. Server Flag Bit It is reserved to the identification of the server. The binary data received by the terminal is returned without change. 6.1.6. Command Content It is represented in ASC II of string, and the command content is compatible with text message command. 6.1.7. Information Serial Number For details see Data Packet Format section 4.5. 6.1.8. Error Check For details see Data Packet Format section 4.6. 6.1.9. Stop Bit For details see Data Packet Format section 4.7. - 26 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 6.2. Packet Replied by Terminal Format Length (Byte) Start Bit 2 Packet Length 1 Protocol Number 1 Length of Command 1 Information Server Flag Bit 4 Content Command Content M Language 2 Information Serial Number 2 Error Check 2 Stop Bit 2 6.2.1. Start Bit For details see Data Packet Format section 4.1. 6.2.2. Packet Length For details see Data Packet Format section 4.2. 6.2.3. Protocol Number The terminal responds to the command sent by the server. The format of data packet is consistent with “the command sent by the server to the terminal”, but the Protocol Number herein is different and is 0x15. 6.2.4. Length of Command Server Flag Bit + Length of Command Content Example: measured in bytes, 0x0A means the content of command occupied ten bytes. 6.2.5. Server Flag Bit It is reserved to the identification of the server. The binary data received by the terminal is returned without change. 6.2.6. Command Content It is represented in ASC II of string, and the command content is compatible with text message command. 6.2.7. Language A bit indicates the current language used in the terminal. Chinese: 0x00 0x01 English: 0x00 0x02 6.2.8. Information Serial Number For details see Data Packet Format section 4.5. 6.2.9. Error Check For details see Data Packet Format section 4.6. 6.2.10. Stop Bit For details see Data Packet Format section 4.7. - 27 Shenzhen Concox Information Technology Co.,Ltd Copyright Reserved. http://www.cothinking.net/ GPS Tracker Communication Protocol 6.3. Looking Up Location Information Function Description: the command to obtain the positioning information. A mobile phone user or a short message server may obtain the positioning information by this command. In an example, the transmitting and returning strings are converted into ASCII to generate command contents. Sending by the server DWXX# Returned by the terminal if successful, return DWXX=Lat:,Lon:,Course:,Speed:,DateTime: