Data Sheet

GPS Module
L80 GPS Protocol Specification
L80_GPS_Protocol_Specification Confidential / Released 25 / 41
run time
‘0’:Disable
>=’1000’:Enable (Range: 1000~518400000)
sleep time
(Range:1000~518400000)
Second run time
‘0’:Disable
>=’1000’:Enable (Range: 1000~518400000)
Second sleep time
(Range:1000~518400000)
*
End character of data field
Checksum
Hexadecimal checksum
<CR><LF>
Each of message
The unit of run time or sleep time is msec, the second run time should larger than first run time when
non-zero value.
3.14. Packet Type: 251 PMTK_SET_NMEA _BAUDRATE
This message is used to set NMEA port baud rate. Using PMTK251command to setup baud rate setting,
the setting will be back to default value in the two conditions.
1. Full cold start command is issued.
2. Enter standby mode.
Example:
$PMTK251,38400*27<CR><LF>
Field
Description
$
Each NMEA message starts with ‘$’
PMTK
MTK proprietary message
Packet type
251
Baud rate
Baud rate setting:
9600 – default setting
4800
9600
14400
NOTE
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