Frequently Asked Questions - Kauai Labs VMX-pi User Manual

Overview
Hardware Reference Manual
The VMX-pi Hardware Reference Manual
resources in detail.
Which Raspberry Pi board versions are compatible with VMX-pi?
Raspberry Pi 3 Model B+
Raspberry Pi 3 Model B
Raspberry Pi 2 Model B
Raspberry Pi Zero/W
Raspberry Pi Zero
Can VMX-pi be used with the National Instruments RoboRIO™?
Yes, in several ways.
1. Ethernet. In this configuration, by using the WPI NetworkTables library, vision
processing detection events performed on the Raspberry Pi can be exchanged
with the RoboRIO. Additionally, VMX-pi's battery-backed real-time clock and
Network Time Protocol Daemon (NTPD) can be used to synchronize timestamps
between RoboRIO and VMX-pi, ensuring log file timestamps on both systems
are the same.
2. USB. The VMX-pi USB port is compatible with navX-MXP and navX-Micro;
therefore, by connecting a USB cable from VMX-pi to RoboRIO, VMX-pi's IMU
data can be accessed via existing navX-FRC Libraries.
3. CAN. The VMX-pi can connect to the same CAN bus as the RoboRIO; although
there is currently no direct CAN communication with RoboRIO, this connection
does allow a FRC CAN bus to be monitored.
Please see the instructions for
Can VMX-pi be used to control devices (e.g., motors, servos and relays) on a FRC
competition robot?
VMX-pi is not legal for competition FRC actuator control.
However VMX-pi is definitely legal for vision and motion processing, and can also be
used to monitor the CAN bus.
describes all VMX-pi hardware components and

Frequently Asked Questions

installing VMX-pi on a FRC Robot for more details.
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