Holux M-93 SPECIFICATION V1.0, Спецификация

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M-93
GPS Module series
THE PRO NAME IN GPS
HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)
TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw http:www.holux.com.tw
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5.3 MTK NMEA Packet Format
Preamble TalkerID PktType Datafield * CHK1 CHK2 CR LF
Maximum packet length is restricted to 255 bytes
Field Length Type D
Preamble 1 byte Character “$”
TalkerID 4 byte Character string “PMTK”
PktType 3 byte Character string
“000”to “999”, an identifier
used to tell the decoder how
to decode the packet
DataField Variable
“, ”must be inserted ahead
each data filed to help the
decoder process the Data
Field
* 1 byte Character
The star symbol is used to
mark the end of Data Field
CHK1
CHK2
2 byte Character string
checksum of the data
between Preamble “, ”and
“*”
CR, LF 2 byte Binary data
used to identify the end of a
packet