Data Sheet

GPS Module
L80 GPS Protocol Specification
L80_GPS_Protocol_Specification Confidential / Released 27 / 41
Field
Description
$
Each NMEA message starts with ‘$’
PMTK
MTK proprietary message
Packet type
300
Fix interval
Position fix interval [msec]. Must be greater than 100.
Reserved
0
Reserved
0
Reserved
0
Reserved
0
*
End character of data field
Checksum
Hexadecimal checksum
<CR><LF>
Each of message
3.17. Packet Type: 301 PMTK_API_SET_DGPS_MODE
This message is used to configure the source mode of DGPS correction data.
Example:
$PMTK301,2*2E<CR><LF>
Field
Description
$
Each NMEA message starts with ‘$’
PMTK
MTK proprietary message
Packet type
301
Mode
DGPS data source mode.
‘0’ = No DGPS source
‘2’ = WAAS
*
End character of data field
Checksum
Hexadecimal checksum
Quectel
Confidential