HiTechnic Products

HiTechnic NXT Sensor Multiplexer for LEGO Mindstorms NXT

Introduction

The HiTechnic Sensor Multiplexer, (SMUX), allows you to attach up to 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. It uses separate battery box with a standard 9v battery to provide adequate power to each of 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

HiTechnic Compass Sensor

HiTechnic Color Sensor

HiTechnic Gyro Sensor

HiTechnic IRSeeker

HiTechnic Acceleration Sensor

HiTechnic Prototype Sensor

HiTechnic Color Sensor V2 Sensor

HiTechnic IRSeeker V2

HiTechnic IR Receiver

HiTechnic EOPD Sensor

Programming

NXT-G
New versions of NXT-G programming blocks 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
A suite of RobotC drivers to support the SMUX is available from the HiTechnic downloads page.

NXC
NXC support routines can be downloaded from the HiTechnic downloads page.

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 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

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 2.0: This block adds support for the HiTechnic Sensor Multiplexer.

	Description	Version	Release Date	Size
	HiTechnic Compass Sensor Block for Mindstorms NXT Software	2.0	July 29th, 2010	628.16 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

NXC driver for HiTechnic Sensor MUX

This driver suite makes it possible to use the Sensor Multiplexer with NXC programs. Download and expand the suite and keep it to the folder where you keep your NXC programs. Complete with help and sample files. See Xander Soldaat's blog for more information.

	Description	Version	Release Date	Size
	NXC driver for HiTechnic Sensor MUX	0.4	July 29th, 2010	77.23 KB	Download Now

RobotC Drivers for HiTechnic Sensors & SMUX

A suite of RobotC drivers to support HiTechnic sensors and the HiTechnic Sensor Multiplexer. These drivers make it easy to use HiTechnic sensors when programming in RobotC and allow you to maintain control over when and how RobotC accesses the sensors. These drivers are for RobotC version 2.00 or later.

Note: This is the latest version. The previous version was mistakenly referred to as 2.0.

More Info

	Description	Version	Release Date	Size
	RobotC Drivers for HiTechnic Sensors & SMUX	1.5	July 12th, 2010	658.09 KB	Download Now

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HiTechnic Sensor Multiplexer (NSX2020)

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