Quectel_GNSS_Flash_EPO_Application_Note_V1.0(Quectel_GNSS_Flash_EPO_Application_Note

GNSS Flash EPO Application Note GNSS Module Series Rev. GNSS_Flash_EPO_Application_Note_V1.0 Date: 2017-04-28 www.quectel.com

GNSS Module Series GNSS Flash EPO Application Note Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Email: info@quectel.com Or our local office. For more information, please visit: http://www.quectel.com/support/salesupport.aspx For technical support, or to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx Or email to: Support@quectel.com GENERAL NOTES QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS‟ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. COPYRIGHT THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL CO., LTD. TRANSMITTING, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN. Copyright © Quectel Wireless Solutions Co., Ltd. 2017. All rights reserved. GNSS_Flash_EPO_Application_Note Confidential / Released 1 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note About the Document History Revision Date Author Description 1.0 2017-04-28 Matt YE Initial GNSS_Flash_EPO_Application_Note Confidential / Released 2 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 4 Figure Index ................................................................................................................................................. 5 1 Introduction .......................................................................................................................................... 6 2 Download EPO Files ............................................................................................................................ 7 2.1. Types of EPO Files .................................................................................................................... 7 2.2. Download URL of EPO Files ..................................................................................................... 7 2.3. Recommended Download Strategy of EPO Files ..................................................................... 8 2.4. The Validity Period of EPO Files ............................................................................................... 9 2.5. One SV Format of EPO Files .................................................................................................. 11 3 Format of EPO Files ........................................................................................................................... 12 3.1. GPS Only EPO File Format ..................................................................................................... 12 3.2. GPS+GLONASS EPO File Format ......................................................................................... 13 4 MTK Binary Protocol ......................................................................................................................... 14 5 EPO Binary Packet Format ............................................................................................................... 15 6 EPO Data Transfer Protocol ............................................................................................................. 17 6.1. 6.2. EPO Data Transfer Procedure................................................................................................. 17 Error Handling .......................................................................................................................... 18 6.3. Check EPO Data in GNSS Chip .............................................................................................. 19 7 Pseudo Codes for EPO Data Transfer Protocol ............................................................................. 20 8 EPO Related PMTK Commands ....................................................................................................... 23 8.1. 8.2. 8.3. Packet Type: 253 PMTK_SET_OUTPUT_FMT ...................................................................... 23 Packet Type: 607 PMTK_Q_EPO_INFO................................................................................. 24 Packet Type: 707 PMTK_DT_EPO_INFO .............................................................................. 24 8.4. MTK Binary Packet Types ....................................................................................................... 25 8.4.1. Acknowledge Packet (Packet Type 1) ........................................................................... 25 8.4.2. EPO Acknowledge Packet (Packet Type 2) ................................................................... 25 8.4.3. Change UART Format Packet (Packet Type 253) ......................................................... 26 9 Appendix A References ..................................................................................................................... 28 GNSS_Flash_EPO_Application_Note Confidential / Released 3 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note Table Index TABLE 1: TYPES OF EPO FILES ....................................................................................................................... 7 TABLE 2: DOWNLOAD URL OF EPO FILES ..................................................................................................... 7 TABLE 3: MTK BINARY PROTOCOL FORMAT................................................................................................ 14 TABLE 4: DESCRIPTION OF MTK BINARY PROTOCOL PARAMETERS ...................................................... 14 TABLE 5: EPO BINARY PACKET FORMAT ..................................................................................................... 15 TABLE 6: MTK_BIN_EPO (CONTAINS 2 SAT DATA) ....................................................................................... 15 TABLE 7: MTK_BIN_EPO (CONTAINS 1 SAT DATA) ....................................................................................... 16 TABLE 8: MTK_BIN_EPO (CONTAINS NO SAT DATA) ................................................................................... 16 TABLE 9: ACKNOWLEDGE PACKET OF MTK _BIN_EPO .............................................................................. 16 TABLE 10: 253 PMTK_SET_OUTPUT_FMT .................................................................................................... 23 TABLE 11: 607 PMTK_Q_EPO_INFO ............................................................................................................... 24 TABLE 12: 707 PMTK_DT_EPO_INFO ............................................................................................................ 24 TABLE 13: ACKNOWLEDGE PACKET (PACKET TYPE 1) .............................................................................. 25 TABLE 14: EPO ACKNOWLEDGE PACKET (PACKET TYPE 2) EXAMPLE 1 ................................................ 25 TABLE 15: EPO ACKNOWLEDGE PACKET (PACKET TYPE 2) EXAMPLE 2 ................................................ 26 TABLE 16: CHANGE UART FORMAT PACKET (PACKET TYPE 253) EXAMPLE 1 ....................................... 26 TABLE 17: CHANGE UART FORMAT PACKET (PACKET TYPE 253) EXAMPLE 2 ....................................... 27 TABLE 18: ALMANAC, EPHEMERIS & EPO .................................................................................................... 28 TABLE 19: TERMS AND ABBREVIATIONS ...................................................................................................... 28 GNSS_Flash_EPO_Application_Note Confidential / Released 4 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note Figure Index FIGURE 1: RECOMMENDED DOWNLOAD STRATEGY OF EPO FILES ......................................................... 8 FIGURE 2: ONE SV FORMAT OF EPO FILES ................................................................................................. 11 FIGURE 3: GPS ONLY EPO FILE FORMAT .................................................................................................... 12 FIGURE 4: GPS+GLONASS EPO FILE FORMAT ........................................................................................... 13 FIGURE 5: EPO DATA TRANSFER PROCEDURE ......................................................................................... 18 GNSS_Flash_EPO_Application_Note Confidential / Released 5 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note 1 Introduction EPO (Extended Prediction Orbit) is a free service provided by MediaTek, which can achieve fast TTFF and improve accuracy in weak signal conditions. This document mainly describes EPO file format and EPO data transfer protocol for EPO Management Tool development. This document is applicable to the following Quectel modules:  L26  L70  L76  L76B  L76-L  L80  L86 GNSS_Flash_EPO_Application_Note Confidential / Released 6 / 28 Quectel Confidential

GNSS Module Series GNSS Flash EPO Application Note 2 Download EPO Files 2.1. Types of EPO Files Table 1: Types of EPO Files EPO Type GNSS Type Description Unified QEPO URL GPS only Unified QEPO URL GPS+GLONASS 6-hour prediction orbit (ephemeris) Single file name, always get the latest QEPO file The server auto selects the EPO files valid at the current time, no need to specify the file number 6-hour prediction orbit (ephemeris) Single file name, always get the latest QEPO file The server auto selects the EPO files valid at the current time, no need to specify the file number EPO EPO GPS only 3-30 days prediction orbit (ephemeris) GPS+GLONASS 3-30 days prediction orbit (ephemeris) 2.2. Download URL of EPO Files Table 2: Download URL of EPO Files EPO Type GNSS Type EPO File URL File Name Unified QEPO URL GPS only http://wpepodownload.mediatek.com/ QGPS.DAT?vendorinfo Single name: QGPS.DAT Unified QEPO URL GPS+ http://wpepodownload.mediatek.com/ GLONASS QG_R.DAT?vendorinfo Single name: QG_R.DAT EPO GPS only http://wpepodownload.mediatek.com/ EPO_GPS_3_X.DAT?vendorinfo EPO GPS+ http://wpepodownload.mediatek.com/ GLONASS EPO_GR_3_X.DAT?vendorinfo X = 1~10 EPO_GPS_3_1.DAT ~ EPO_GPS_3_10.DAT X = 1~10. EPO_GR_3_1.DAT ~ EPO_GR_3_10.DAT GNSS_Flash_EPO_Application_Note Confidential / Released 7 / 28 Quectel Confidential

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