GPS Module DataSheet
Contents
1. GLL Geographic Position Latitude Longitude This sentence contains the fix latitude and longitude GPGLL 2232 1799 N 11401 1824 E 021513 000 A A 50 Table 3 GLL Data Format Name Example Units Description Message ID GPGLL GLL protocol header Latitude 2232 1799 ddmm mmmm N S Indicator N N north or S south Longitude 11401 1824 dddmm mmmm E W Indicator E E east or W west UTC Position 021513 000 hhmmss sss Fix Status A A data valid or V data not valid Fix Mode A A autonomous N No fix D DGPS E DR Checksum 50 EOL lt CR gt lt LF gt End of message temination GSA GNSS DOP and Active Satellites This sentence contains the mode of operation type of fix PRNs of the satellites used in the solution as well as PDOP HDOP and VDOP GPGSA A 3 26 05 18 15 27 29 5 1 52 1 25 0 87 0F Table 4 GSA Data Format Name Example Units Description Message GPGSA GSA protocol header Mode 1 A See Table 4 2 Mode 2 3 See Table 4 1 ID of satellite used 26 Sv on Channel 1 ID of satellite used 05 Sv on Channel 2 ID of satellite used lt Null gt Sv on Channel 12 Null fields when it is not Used PDOP 1 52 Position Dilution of Precision 5SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM58 series Datasheets HDOP 1 25 Horizontal Dilution of Precision VDOP 0 87 Vertical Dilutio2. x 12 x 4 0 mm Center Frequency 1575 3 MHz Bandwidth 10 MHz min Impedance 509 Axial Ratio 3 dB max Polarization RHCP Mechanical requirements Dimension 20 5mm x12 8mm x 7 8mm Weight 6g Power consumption VCC 3 0 4 2V Current 45mA typical Environment Operating temperature 40 85 C Storage temperature 40 125 C Humidity 95 2SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM58 series Hardware Interfaces Configuration Power Supply Regulated power for the SKM58 series is required The input voltage Vcc should be 3 0V 4 2V current is no less than 150mA Suitable decoupling must be provided by external decoupling circuitry 10uF and luF It can reduce the Noise from power supply and increase power stability UART Ports The module supports one full duplex serial channels UART The serial connections are at Pin Description Datasheets 2 85V LVTTL logic levels if need different voltage levels use appropriate level shifters the data format is however fixed X N 8 1 i e X baud rate no parity eight data bits and one stop bit no other data formats are supported LSB is sent first The modules default baud up 9600bps The RXDO amp TXDO recommended to pull up 10KQ It can increase the rate is set stability of serial data Pin No Pin name VO Description Remark UART Port 1 VCC P Modu
3. SkyNav SKM58 Datasheets SKYLAB Simplify Your System GPS Module DataSheet Name Ultra High Sensitivity and The Smart Antenna GPS Module Model NO SKM58 Revision 001 Revision History Revision Description Approved Date 001 Initial Release to 001 Neil 20110101 Skylab M amp C Technology Co Ltd Address Room 801 Bldg 211 Terra Industrial Park Futian District Shenzhen Phone 86 755 8340 8210 Sales Support Phone 86 755 8340 8130 Technical Support Fax 86 755 8340 8560 E Mail sales skylab com cn Copyright 2011 Skylab M amp C Co Ltd All Right Reserved The information contained herein is subject to change without notice 1SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM58 Series Ultra High Sensitivity and Low Power The Smart Antenna GPS Module General Description The SkyNav SKMS58 Series with embedded GPS antenna enables high performance navigation in the most stringent applications and solid fix even in harsh GPS visibility environments It is based on the high performance features of the MediaTek 3329 single chip architecture Its 165dBm tracking sensitivity extends positioning coverage into place like urban canyons and dense foliage environment where the GPS was not possible before The 6 pin UART connector design is the easiest and convenient solution to be embedded in a portable device and receiver like PND GPS mouse car holder personal locator s
4. ecommended minimum specific GNSS data Y VTG Course over ground and ground speed N ZDA Date and Time N GGA Global Positioning System Fixed Data This sentence contains the position time and quality of the navigation fix See RMC for Fix Status Fix Mode Fix Date Speed and True Course See GSA for Fix Type PDOP and VDOP GPGGA 021514 000 2232 1799 N 11401 1823 E 1 6 1 25 84 0 M 2 2 M 74 Table 2 GGA Data Format Name Example Units Description Message ID GPGGA GGA protocol header UTC Position 021514 000 hhmmss sss Latitude 2232 1799 ddmm mmmm N S indicator N N north or S south Longitude 11401 1823 dddmm mmmm E W Indicator E E east or W west Position Fix Indicator 1 See Table 2 1 Satellites Used 6 Range 0 to 12 HDOP 1 25 Horizontal Dilution of Precision MSL Altitude 84 0 meters Altitude referenced to the Ellipsoid AltUnit M meters Altitude Unit GeoSep 2 2 meters Geoidal Separation GeoSepUnit M meters Geoidal Separation Unit Age of Diff Corr lt Null gt second Null fields when it is not Used 4SKYLAB www skylab com cn DS SKM58 V1 0 110101 SkyNav SKM58 series Datasheets Diff Ref Station ID lt Null gt Null fields when it is not Used Checksum 74 EOL lt CR gt lt LF gt End of message termination Table 2 1 Position Fix Indicators Value Description 0 Fix not available or invalid 1 GPS SPS Mode fix valid 2 Differential GPS SPS Mode fix valid 3 GPS PPS Mode fix valid
5. its Description Message ID GPVTG VTG protocol header Tcourse 148 81 Degrees True Course Reference T T True Mcourse lt Null gt Degrees Magnetic Course Null fields when it is not Used Reference M M Magnetic Null fields when it is not Used Speed over ground 0 13 Knots Nautical Miles per Hour Units N Knots Speed over ground 0 24 Km hr in Kilometers per Hour Units K Kilometer per hour Mode A A Autonomous N No fix D DGPS E DR Checksum 3D EOL lt CR gt lt LF gt End of message termination 7SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM58 series ZDA Date and Time Datasheets This sentence contains UTC date amp time and local time zone offset information GPZDA 023345 000 10 04 2010 50 Table 8 ZDA Data Format Name Example Units Description Message ID GPZDA ZDA protocol header UTC Time 023345 000 hhmmss sss Day 10 UTC time day 01 31 dd Month 04 UTC time month 01 12 mm Year 2010 UTC time year 4 digit year yyyy local zone hours lt null gt Local Time Zone Offset Hours Null fields when itis not Used local zone minutes lt null gt Local Time Zone Offset Minutes Null fields when it is not Used Checksum 50 EOL lt CR gt lt LF gt End of message termination 8sSKYLAB DS SKM58 V1 0 110101 www skylab com cn
6. le Power Supply VCC 3 0 4 2V 2 GND G Module Power Ground Reference Ground 3 VBAT O RTC and backup SRAM power 2 0 4 2V May be connect to Battery 4 TXD O TTL 3 1V gt VOH22 4V 0 3VSVOLS0 4V Strap pin default MUST pull up 5 RXD I TTL 3 6V gt VIH 22 0V 0 3V lt VIL lt 0 8V Leave Open if not used 6 PPS O Time pulse Signal Default 100ms pulse sec Leave Open if not used Mechanical Specification ai i i mt Hanae T ARAARA Figure 3 SKM58 Series Dimensions 3SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM58 series Software Protocol NMEA 0183 Protocol The NMEA protocol is an ASCII based protocol Records start with a and with carriage return line feed GPS specific messages all start with GPxxx where xxx is a three letter identifier of the message data that follows NMEA messages have a checksum which allows detection of corrupted data transfers Table 1 NMEA 0183 Output Messages Datasheets The SkyNav SKG12A supports the following NMEA 0183 messages GGA GLL GSA GSV RMC VTG ZDA The module default NMEA 0183 output is set up GGA GSA RMC GSV and default baud rate is set up 9600bps NMEA Record Description Default GGA Global positioning system fixed data Y GLL Geographic position latitude longitude N GSA GNSS DOP and active satellites Y GSV GNSS satellites in view Y RMC R
7. n of Precision Checksum 0F EOL lt CR gt lt LF gt End of message termination Table 4 1 Mode 1 Value Description 1 Fix not available 2 2D Fix 3 3D Fix Table 4 2 Mode 2 Value Description M Manual forced to operate in 2D or 3D mode A Automatic allowed to automatically switch 2D 3D GSV GNSS Satellites in View This sentence contains the PRNs azimuth elevation and signal strength of all satellites in view GPGSV 3 1 12 15 79 333 42 42 50 127 29 45 263 44 02 36 124 30 7E GPGSV 3 2 12 26 36 226 34 05 35 046 22 27 33 161 29 21 16 319 7D GPGSV 3 3 12 10 15 066 31 18 14 285 45 24 12 319 15 08 09 047 18 7E Table 5 GSV Data Format Name Example Units Description Message ID GPGSV GSV protocol header Number of Message 3 Total number of GSV sentences Range 1 to 3 Message Number 1 Sentence number of the total Range 1 to 3 Satellites in View 12 Number of satellites in view Satellite ID 15 Channel 1 Range 01 to 32 Elevation 79 degrees Channel 1 Range 00 to 90 Azinmuth 333 degrees Channel 1 Range 000 to 359 SNR C NO 42 dB Hz Channel 1 Range 00 to 99 null when not tracking Satellite ID 02 Channel 4 Range 01 to 32 Elevation 36 degrees Channel 4 Range 00 to 90 Azimuth 124 degrees Channel 4 Range 000 to 359 SNR C NO 30 dB Hz Channel 4 Range 00 to 99 null when not tracking Checksum 7E EOL lt CR gt lt LF gt End of message termination Depe
8. nding on the number of satellites tracked multiple messages of GSV data may be required RMC Recommended Minimum Specific GNSS Data This sentence contains the recommended minimum fix information SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM658 series Datasheets See GGA for Fix Quality Sats Used HDOP Altitude Geoidal Separation and DGPS data See GSA for Fix Type PDOP and VDOP GPRMC 023345 000 A 2232 1767 N 11401 1953 E 0 18 151 55 100410 A 6B Table 6 RMC Data Format Name Example Units Description Message ID GPRMC RMC protocol header UTS Position 023345 000 hhmmss sss Status A A data valid or V data not valid Latitude 2232 1767 ddmm mmmm N S Indicator N N north or S south Longitude 11401 1953 dddmm mmmm E W Indicator E E east or W west Speed Over Ground 0 18 Knots Course Over Ground 151 55 Degrees True Course Date UTC 100410 ddmmyy Magnetic variation Null gt Degrees Null fields when it is not Used Magnetic Variation Direction lt Null gt E east or W west Null fields when it is not Used Fix Mode A A autonomous N No fix D DGPS E DR Checksum 6B EOL lt CR gt lt LF gt End of message termination VTG Course Over Ground and Ground Speed This sentence contains the course and speed of the navigation solution GPVTG148 81 T M 0 13 N 0 24 K A 3D Table 7 VTG Data Format Name Example Un
9. peed camera detector and vehicle locator Applications E LBS Location Based Service Vehicle navigation system PND Portable Navigation Device GPS mouse and Bluetooth GPS receiver Timing application Pin Assignment ENWAU gt lt SKYLAB Simplify your systems Figure 1 SKM58 Top View Features Ultra high sensitivity 165dBm 22 tracking 66 acquisition channel receiver WAAS EGNOS MSAS GAGAN support AGPS support NMEA protocols default speed 9600bps One serial port Embedded patch antenna 12 12 4 mm Operating temperature range 40 to 85 C RoHS compliant Lead free Tiny form factor 20 5mm x12 8mm x 7 8mm Figure 2 SKM58 Pin Package 1SKYLAB DS SKM58 V1 0 110101 www skylab com cn SkyNav SKM658 series Performance Specification Datasheets Parameter Specification GPS receiver Receiver Type L1 frequency band C Acode 22 Tracking 66 Acquisition Channel Sensitivity Tracking 165dBm Acquisition 148dBm Accuracy Position 3 0m CEP50 without SA Typical Open Sky 0 1m s Velocity without SA Timing PPS 60ns RMS Acquisition Time Cold Start 36s Warm Start 33s Hot Start Is Re Acquisition lt ls Power Consumption Tracking 40mA 3 3V Typical Acquisition 45mA 3 3V Sleep Standby TBD Navigation Data Update Rate 1Hz Operational Limits Altitude Max 18 000m Velocity Max 515m s Acceleration Less than 4g Antenna Specifications Outline Dimension 12
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