HiTechnic Sensor Multiplexer (NSX2020)

Price : $57.95

The HiTechnic Sensor Multiplexer extends your NXT and adds extra functionality by allowing up to 4 sensors to be connected to one NXT sensor port. Use any combination of LEGO and HiTechnic sensors to expand your robot's sensor capabilities and leave other sensor ports to connect TETRIX controllers and other devices. Connect more than one HiTechnic Sensor Multiplexer for more connectivity. Programming support for LabVIEW 2009 and RobotC with NXT-G support in development. Note: The Sensor Multiplexer is not supported on the EV3.

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HiTechnic NXT Sensor Multiplexer for LEGO Mindstorms NXT

Introduction

The HiTechnic Sensor Multiplexer, (SMUX), allows you to attach up to four NXT sensors to a single NXT port.

The SMUX connects to an NXT sensor port using a standard NXT wire and uses the digital I2C communications protocol. A standard HiTechnic battery box is provided with the SMUX that uses 6 AA batteries to provide adequate power for the attached sensors. The SMUX supports a wide range of digital and analog sensors.

Supported HiTechnic and LEGO Sensors

LEGO Ultrasonic Sensor

LEGO Light Sensor

LEGO Touch Sensor

LEGO Sound Sensor

HiTechnic Acceleration Sensor

HiTechnic Angle Sensor

HiTechnic Barometric Sensor

HiTechnic Compass Sensor

HiTechnic Color Sensor

HiTechnic EOPD Sensor

HiTechnic Gyro Sensor

HiTechnic IRReceiver

HiTechnic IRSeeker

HiTechnic IRSeeker V2

HiTechnic Magnetic Sensor

Note: The HiTechnic IRLink is not supported because the Sensor Multiplexer only allows read operations from the attached digital sensors. This also implies that certain operations, such as controlling the mode of the Color Sensor V2, is disabled when attached through the multiplexer since this would require a write operation to the sensor.

Programming

NXT-G
New versions of NXT-G programming blocks are required to use the SMUX with the LEGO Mindstorms software. These blocks are very similar to the standard sensor blocks but allow you to specify the SMUX port your sensor is attached to in addition to the NXT port connected to the SMUX. These blocks will be available from the HiTechnic downloads page in coming weeks.

Other Programming Environments

RobotC
To use HiTechnic Sensor Multiplexer with RobotC, HiTechnic recommends the use of the HiTechnic drivers pack developed by Xander Soldaat. With these drivers it is easy to use the sensors connected either directly to the NXT or through the HiTechnic Sensor Multiplexer. To get the latest version of the driver suite, as well as installation and tutroial information, please go to botbench.com.

NXC
Xander Soldaat has developed a driver suite for programming the HiTechnic Sensor Multiplexer with NXC. This driver suite provides functions that let you read sensors connected through the multiplexer. You can find the latest version of the driver suite on botbench.com.

Sensor Multiplexer Register Layout

Address	Type	Contents
00 – 07H	chars	Sensor version number
08 – 0FH	chars	Manufacturer
10 – 17H	chars	Sensor type
18 – 1FH	bytes	Not used
20H	byte	Command
21H	byte	Status
22H	byte	Channel 1 mode
23H	byte	Channel 1 type
24H	byte	Channel 1 I2C byte count
25H	byte	Channel 1 I2C device address
26H	byte	Channel 1 I2C memory address
27H	byte	Channel 2 mode
28H	byte	Channel 2 type
29H	byte	Channel 2 I2C byte count
2AH	byte	Channel 2 I2C device address
2BH	byte	Channel 2 I2C memory address
2CH	byte	Channel 3 mode
2DH	byte	Channel 3 type
2EH	byte	Channel 3 I2C byte count
2FH	byte	Channel 3 I2C device address
30H	byte	Channel 3 I2C memory address
31H	byte	Channel 4 mode
32H	byte	Channel 4 type
33H	byte	Channel 4 I2C byte count
34H	byte	Channel 4 I2C device address
35H	byte	Channel 4 I2C memory address
36H	byte	Channel 1 upper 8 bits
37H	byte	Channel 1 lower 2 bits
38H	byte	Channel 2 upper 8 bits
39H	byte	Channel 2 lower 2 bits
3AH	byte	Channel 3 upper 8 bits
3BH	byte	Channel 3 lower 2 bits
3CH	byte	Channel 4 upper 8 bits
3DH	byte	Channel 4 lower 2 bits
3E, 3FH	chars	Reserved
40 – 4FH	bytes	Channel 1 I2C buffer
50 – 5FH	bytes	Channel 2 I2C buffer
60 – 6FH	bytes	Channel 3 I2C buffer
70 – 7FH	bytes	Channel 4 I2C buffer

Additional information about low level program including examples in both RobotC and NXC is available from the HiTechnic Downloads page and also from http://www.breigh.com/xander/HTSMUX-Tutorial-LATEST.pdf

Downloads

HiTechnic Acceleration Sensor Block for Mindstorms NXT Software

The Acceleration Sensor Block adds support for the Acceleration Sensor features to the LEGO MINDSTORMS NXT Software. This block provides features enabling access to the x axis, y axis and z axis to measure and monitor acceleration and tilt.
New with version 2.0: This block adds support for the HiTechnic Sensor Multiplexer as well as data logging with the LEGO Mindstorms 2.0 Education software.

	Description	Version	Release Date	Size
	HiTechnic Acceleration Sensor Block for Mindstorms NXT Software	2.0	July 29th, 2010	420.43 KB	Download Now

HiTechnic Color Sensor Block for Mindstorms NXT Software

The Color Sensor Block adds support for all Color Sensor features to the LEGO MINDSTORMS NXT Software. This block enables access to Color number, Red, Green and Blue relative color content, and in/out of color range.
New with version 2.0: This block adds support for the HiTechnic Sensor Multiplexer as well as data logging with the LEGO Mindstorms 2.0 Education software.

	Description	Version	Release Date	Size
	HiTechnic Color Sensor Block for Mindstorms NXT Software	2.0	July 28th, 2010	646.03 KB	Download Now

HiTechnic Compass Sensor Block for Mindstorms NXT Software

The Compass Sensor Block adds support for all Compass Sensor features to the LEGO MINDSTORMS NXT Software. This block gives access to features enabling Compass calibration, target heading and in/out of range and others.
New with version 2.1: Fixes a bug preventing entering Calibration mode. You can now tell if calibration succeeded or failed by examining the absolute heading after calibration. This block supports for the HiTechnic Sensor Multiplexer as well as data logging with the LEGO Mindstorms 2.0 Education software.

	Description	Version	Release Date	Size
	HiTechnic Compass Sensor Block for Mindstorms NXT Software	2.1	January 14th, 2011	637.96 KB	Download Now

HiTechnic Gyro Sensor Block for Mindstorms NXT Software

The Gyro Sensor Block adds support for the Gyro features to the LEGO MINDSTORMS NXT Software. This block provides features enabling measurement of the rate and direction of rotation.
New with version 2.0: This block adds support for the HiTechnic Sensor Multiplexer as well as data logging with the LEGO Mindstorms 2.0 Education software.

	Description	Version	Release Date	Size
	HiTechnic Gyro Sensor Block for Mindstorms NXT Software	2.0	July 29th, 2010	430.68 KB	Download Now

LEGO Ultrasonic Sensor Block with support for the HiTechnic Sensor Multiplexer

This block allows you to use the LEGO Ultrasonic Sensor connected via the HiTechnic Sensor Multiplexer (SMUX). This block lets you select the port used to connect the SMUX as well as the port on the SMUX that is used for the sensor.

	Description	Version	Release Date	Size
	LEGO Ultrasonic Sensor Block with support for the HiTechnic Sensor Multiplexer	1.0	July 30th, 2010	470.43 KB	Download Now

LEGO Light Sensor Block with support for the HiTechnic Sensor Multiplexer

This block supports the LEGO Light Sensor connected via the HiTechnic Sensor Multiplexer (SMUX). This block lets you select the port used to connect the SMUX as well as the port on the SMUX that is used for the sensor.

	Description	Version	Release Date	Size
	LEGO Light Sensor Block with support for the HiTechnic Sensor Multiplexer	1.0	July 30th, 2010	434.68 KB	Download Now

LEGO Touch Sensor Block with support for the HiTechnic Sensor Multiplexer

This block supports the LEGO Touch Sensor connected via the HiTechnic Sensor Multiplexer (SMUX). This block lets you select the port used to connect the SMUX as well as the port on the SMUX that is used for the sensor.

	Description	Version	Release Date	Size
	LEGO Touch Sensor Block with support for the HiTechnic Sensor Multiplexer	1.0	July 30th, 2010	371.63 KB	Download Now

LEGO Sound Sensor Block with support for the HiTechnic Sensor Multiplexer

This block supports the LEGO Sound Sensor connected via the HiTechnic Sensor Multiplexer (SMUX). This block lets you select the port used to connect the SMUX as well as the port on the SMUX that is used for the sensor.

	Description	Version	Release Date	Size
	LEGO Sound Sensor Block with support for the HiTechnic Sensor Multiplexer	1.0	July 30th, 2010	430.29 KB	Download Now

LEGO Sensor VIs for LabVIEW 2009

LEGO Sensor VIs and sample program VIs for LabVIEW 2009. Includes support for the LEGO Light, Sound, Touch, and Ultrasonic sensors for use with the HiTechnic Sensor Multiplexer. See included readme.txt file on how to install into LabVIEW 2009.

	Description	Version	Release Date	Size
	LEGO Sensor VIs for LabVIEW 2009	1.0	October 28th, 2010	147.26 KB	Download Now

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