Navilock NL-504ETTL Handleiding

Navilock GPS apparaat NL-504ETTL

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MTK NMEA Packet User Manual

Revision: 0.3

Linked FW Version: 1.902_06

Release Date: 2006/05/02

MediaTek Inc.

MTK NMEA Packet Format

Preamble TalkerID PktType DataField * CHK1 CHK2 CR LF

Packet Length:

The maximum length of each packet is restricted to bytes 255

Packet Contents:

Preamble: One byte character.

‘ $’

TalkderID: Four bytes character string.

“PMTK”

PktType: Three bytes character string.

From “ ” to “ ” 000 999

An identifier used to tell the decoder how to decode the packet

DataField: The DataField has variable length depending on the packet type.

A comma symbol ‘ ’ must be inserted ahead each data filed to help the decoder ,

process the DataField.

*: 1 byte character. The star symbol is used to mark the end of DataField.

CHK1, CHK2: Two bytes character string.

CHK1 and CHK2 are the checksum of the data between Preamble and ‘*’.

CR, LF: Two bytes binary data.

The two bytes are used to identify the end of a packet.

Sample Packet:

$PMTK000*32<CR><LF>

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Navilock Europe

Beeskowdamm 13/15

D-13595 Berlin-Zehlendorf

Phone +49 30 84716503

Email info@navilock.com

Web www.navilock.com

MTK NMEA Packet Protocol:

In order to inform the sender whether the receiver has received the packet, an acknowledge packet

PMTK_ACK should return after the receiver receives a packet.

MTK NMEA Packet List:

Packet Type: 000 PMTK_TEST ..................................................................................... 3

Packet Type: 001 PMTK_ACK ....................................................................................... 3

Packet Type: 010 PMTK_SYS_MSG .............................................................................. 3

Packet Type: 101 PMTK_CMD_HOT_START ................................................................... 3

Packet Type: 102 PMTK_CMD_WARM_START ................................................................ 3

Packet Type: 103 PMTK_CMD_COLD_START ................................................................ 3

Packet Type: 104 PMTK_CMD_FULL_COLD_START ......................................................... 3

Packet Type: 301 PMTK_API_SET_DGPS_MODE .............................................................. 4

Packet Type: 313 PMTK_API_SET_SBAS_ENABLED .......................................................... 4

Packet Type: 314 PMTK_API_SET_NMEA_OUTPUT ........................................................... 4

Packet Type: 320 PMTK_API_SET_PWR_SAV_MODE ........................................................ 4

Packet Type: 401 PMTK_API_Q_DGPS_MODE ................................................................. 4

Packet Type: 413 PMTK_API_Q_SBAS_ENABLED ............................................................. 4

Packet Type: 414 PMTK_API_Q_NMEA_OUTPUT ............................................................. 5

Packet Type: 420 PMTK_API_Q_PWR_SAV_MODE ........................................................... 6

Packet Type: 501 PMTK_DT_DGPS_MODE ..................................................................... 6

Packet Type: 513 PMTK_DT_SBAS_ENABLED ................................................................ 7

Packet Type: 514 PMTK_DT_NMEA_OUTPUT ................................................................... 7

Packet Type: 520 PMTK_DT_PWR_SAV_MODE ............................................................... 7

Packet Type: 604 PMTK_Q_VERSION ........................................................................... 7

Packet Type: 704 PMTK_DT_VERSION ......................................................................... 7

Navilock Europe

Beeskowdamm 13/15

D-13595 Berlin-Zehlendorf

Phone +49 30 84716503

Email info@navilock.com

Web www.navilock.com

PROF E SSI ONA L I N N AV I GATI ON & COM M U NI CATI O N

Packet Type: 000 PMTK_TEST

Packet Meaning:

Test Packet.

DataField:

None

Example:

$PMTK000*32<CR><LF>

Packet Type: 001 PMTK_ACK

Packet Meaning:

Acknowledge Packet

DataField:

PktType: The packet type the acknowledge responds.

Flag: ‘0’ = Invalid packet.

‘1’ = Unsupported packet type

‘2’ = Valid packet, but action failed

‘3’ = Valid packet, and action succeeded

Example:

$PMTK001,101,0*33<CR><LF>

Packet Type: 010 PMTK_SYS_MSG

Packet Meaning:

Output system message

DataField:

Msg: The system message.

‘0’: UNKNOWN

‘1’: STARTUP

Example:

$PMTK010,001*2E<CR><LF>

Packet Type: 101 PMTK_CMD_HOT_START

Packet Meaning:

Hot Restart: Use all available data in the NV Store.

DataField:

Navilock Europe

Beeskowdamm 13/15

D-13595 Berlin-Zehlendorf

Phone +49 30 84716503

Email info@navilock.com

Web www.navilock.com

Product specificaties

Merk:	Navilock
Categorie:	GPS apparaat
Model:	NL-504ETTL
Kleur van het product:	Groen
Breedte:	30 mm
Diepte:	7.5 mm
Hoogte:	30 mm
Capaciteit van de accu/batterij:	70 mAh
Temperatuur bij opslag:	-40 - 85 °C
Aantal kanalen:	32 kanalen
Bedrijfstemperatuur (T-T):	-30 - 85 °C
Acquisitietijden - koud:	45 s
Acquisitietijden - warm:	36 s
GPS-nauwkeurigheid - plaats:	10 m
GPS-nauwkeurigheid - snelheid:	0.1 m/s
Acquisitietijden - heet:	1 s