Crossbow Technology AHRS400 Series - Commands

AHRS400 Series User’s Manual
Doc# 7430-0004-01 Rev. A Page 11
3.5 Commands
The AHRS has a simple command structure. You send a command
consisting of one byte to the DMU over the RS-232 interface and the DMU
will execute the command.
X NOTE
The DMU commands are case sensitive!
GyroView is a very good tool to use when debugging your own software.
GyroView formulates the proper command structures and sends them over
the RS-232 interface. You can use GyroView to verify that the DMU is
functioning correctly. GyroView does not use any commands that are not
listed here.
X NOTE
Certain combinations of characters not listed here can cause the unit to enter
a factory diagnostic mode. While this mode is designed to be very difficult
to enter accidentally, it is recommended that the following command set be
adhered to for proper operation.
3.5.1 Command List
Command Reset
Character(s) Sent R
Response H
Description Resets DMU to default state
Command Voltage Mode
Character(s) Sent r
Response R
Description Changes measurement type to Voltage Mode.
DMU outputs raw sensor voltage in the data
packet.
Command Scaled Mode
Character(s) Sent c
Response C
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