AHRS400 Series User’s Manual
Doc# 7430-0004-01 Rev. A Page 13
DMU a "G" while it is in Continuous Mode will
place the DMU in Polled Mode.
Command Query DMU Version
Character(s) Sent v
Response ASCII string
Description This queries the DMU firmware and will tell you
the DMU type and firmware version. The
response is an ASCII string that describes the
DMU type and firmware version.
Command Query Serial Number
Character(s) Sent S
Response Serial Number Packet
Description This queries the DMU for its serial number. The
DMU will respond with a serial number data
packet that consists of a header byte (FF), the
serial number in 4 bytes, and a checksum byte.
The serial number bytes should be interpreted as
a 32-bit unsigned integer. For example, the serial
number 9911750 would be sent as the four bytes
00 97 3D C6.
Command Request Auto Baud Rate
Character(s) Sent b
Response -
Description This starts the auto baud rate detection process.
This will allow you to change the DMU baud rate
from its default. This change will not affect the
default settings.
1. Start with communications program and
DMU at same baud rate.
2. Send "b" to the DMU. The DMU will
respond with “B”.
3. Change the baud rate of your
communications program.
4. Send "a" to the DMU. The DMU will
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