Pololu Simple - Manual (Page 65)

To set the motor target speed to approximately half-speed forward (63), we could send the following compact
protocol bytes:
We Send:
Command Byte Data Byte 1
Compact Protocol 0x89 (137) 0x3F (63)
Motor Reverse 7-Bit (Serial/USB input mode only)
Command Format:
Command Byte Data Byte 1 Data Byte 2 Data Byte 3
Compact Protocol 0x8A (138) speed - -
Pololu Protocol 0xAA (170) device number 0x0A (10) speed
Description: This command sets the motor target speed in the reverse direction based on the specified low-
resolution (7-bit) Speed byte. The Speed byte is a number from 0 (motor stopped) to 127 (motor reverse at full
speed). This command has no serial response.
Set Speed Mini SSC (Serial/USB input mode only)
Command Format:
Command Byte Data Byte 1 Data Byte 2
Mini SSC Protocol 0xFF (255) device number speed
Description: This is the Mini SSC Protocol command for setting the motor speed. This command has no serial
response. See
Section 6.2 for complete documentation of this command.
Motor Brake (Serial/USB input mode only)
Command Format:
Command Byte Data Byte 1 Data Byte 2 Data Byte 3
Compact Protocol 0x92 (146) brake amount - -
Pololu Protocol 0xAA (170) device number 0x12 (18) brake amount
Description: This command causes the motor to immediately brake by the specified amount (configured
deceleration limits are ignored). The Brake Amount byte can have a value from 0 to 32, with 0 resulting in
maximum coasting (the motor leads are floating almost 100% of the time) and 32 resulting in full braking (the
motor leads are shorted together 100% of the time). Requesting a brake amount greater than 32 results in a Serial
Format Error. This command has no serial response.
Example:
Pololu Simple Motor Controller User's Guide © 2001–2014 Pololu Corporation
6. Using the Serial Interface Page 65 of 101