Linx Technologies RXM-GPS-FM - Manual (Page 13)

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220 – Position Fix Interval
This command sets the position fix interval. This is the time between when
the module calculates its position. This is the same as write message 300.
Ival = the interval time in milliseconds.
The interval must be larger than 100ms. Faster rates require that the baud
rate be increased, the number of messages that are output be decreased
or both. The module automatically calculates the required data bandwidth
and returns an action failed response (Flg = 2) if the interval is faster than
the module can output all of the required messages at the current baud
rate. The following example sets the interval to 1 second.
$PMTK220,1000*1F<CR><LF>
101 – Hot Re-start
This command instructs the module to conduct a hot re-start using all of
the data stored in memory. Periodic mode and static navigation settings are
returned to default when this command is executed.
$PMTK101*32<CR><LF>
102 – Warm Re-start
This command instructs the module to conduct a warm re-start that does
not use the saved ephemeris data. Periodic mode and static navigation
settings are returned to default when this command is executed.
$PMTK102*31<CR><LF>
103 – Cold Re-start
This command instructs the module to conduct a cold re-start that does
not use any of the data from memory. Periodic mode and static navigation
settings are returned to default when this command is executed.
$PMTK103*30<CR><LF>
104 – Restore Default Configuration
This command instructs the module to conduct a cold re-start and return
all configurations to the factory default settings.
$PMTK104*37<CR><LF>
161 – Standby Mode
This command instructs the module to enter a low power standby mode.
Any activity on the RX line wakes the module.
$PMTK161,0*28<CR><LF>
The module outputs the startup message when it wakes up.
$PMTK010,001*2E<CR><LF>
Position Fix Interval Command and Response
Command
Start Msg ID Interval Checksum End
$PMTK 220 ,Ival *Cksum <CR><LF>
Response
Start Msg ID CMD Flag Checksum End
$PMTK 001 ,220 ,Flg *Cksum <CR><LF>
Figure 22: Position Fix Interval Command and Response