RoyalTek rdr-3100 用户手册
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RDR-3100 User Manual
8.3.2 GPS antenna detection output Message
This sentence contains the GPS antenna detector information which read from
GPS module and send to the CAN bus.
The protocol is illustrated as follows:
Example:
$PSRF 122,1*3B<CR><LF>
GPS antenna connected
Check sum= 0x3B.
Item
Field
Description
1
$
Beginning of sentence
2
PSRF122
Message Header
3
GPS antenna status
1: antenna connected
0: antenna not connected
4
*CC<CR><LF>
Check Sum and sentence termination delimiter.
The algorithm of checksum calculation is same
With the one to calculate NMEA checksum.
The algorithm of checksum calculation is same
With the one to calculate NMEA checksum.