A5023/24
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4.5 Set-up suggestions
When the device is fixed in place and connected it can be calibrated as
described above. Choose a calm day and a region of water where there
are no currents. Set the boat turning to left or right at a slow rate and fix
the wheel or tiller. Then, when the turning is steadily under way, press
the auto-calibrate button and watch the LED.
When calibration is completed the boat can be on its way and the next
task is to set North. This is best done by identifying transits on a chart
and heading the boat on the transit. Again, this should be done in the
same conditions so that the heading can be lined up on the transit and
maintained while the set-zero button is pressed.
5
NMEA-0183 commands
The compass can be configured by sending various proprietary sentences
to its NMEA-0183 input. Once configured, the compass will remember
those settings every time it is powered up.
Response:
When any of the input sentences are received the A5023 and A5024 will
reply with an ‘acknowledge’ output sentence of the
format:
$PATC,HCHDG,ACK<CR><LF>
Unless the command results in response which contains data.
