Lego NXT IRSeeker2

The Lego Mindstorms NXT IRSeeker2 sensor can be used to detect an infra-red beacon or signal or ball and may be connected to a PICAXE using an I2C bus and controlled by appropriate PICAXE I2C commands.

LEGO and MINDSTORMS are registered trademarks of the LEGO Group. I2C is a registered trademark of Philips Semiconductors Corporation.

Related Commands:

Using the Hitechnic NXT IRSeeker V2

This is a sample program for the Hitechnic NXT IRSeeker V2 (part NSK1042) using the AXE216 i2c Explorer Kit with a PICAXE-20X2. Please remember IRSeeker V2 requires 9V power on wire 1 of the NXT jack plug.
' **** Tested using a Hitechnic robocup ball (version RCJ-05) ****

Code Example:

#picaxe 20x2
#no_table

; **** AXE216 i2c Experimenter Board Setup ****
; J1	External Power	Fitted (4.5V)
; J2	SCL Pullup		Not fitted (pullup is in sensor)
; J3	SDA Pullup		Not fitted (pullup is in sensor)
; H2	9V Power		Fitted (9V)

symbol ac_direction = b10
symbol sensor1_ac   = b11
symbol sensor2_ac   = b12
symbol sensor3_ac   = b13
symbol sensor4_ac   = b14
symbol sensor5_ac   = b15

; Wires on NXT jack plug.
; Wire colours may vary. Pin 1 is always end nearest latch.
; 1 White	+9V
; 2 Black	0V
; 3 Red		0V
; 4 Green	V+ (4.5V or 5V)
; 5 Yellow	SCL
; 6 Blue	SDA
; Do not use i2c pullup resistor - already provided within sensor.

init:	; Slave address of IRSeeker2 is $10
	hi2csetup i2cmaster, $10, i2cslow, i2cbyte

	; Optional configuration of IRSEEKER2
 	hi2cout $41,($00)  	; AC mode (1200 Hz) 	RCJ-05 Ball switch pos. D 
 	;hi2cout $41,($01) 	; AC mode (600 Hz) 	RCJ-05 Ball switch pos. C
 	;hi2cout $41,($02) 	; DC mode 		RCJ-05 Ball switch pos. B
 	pause 100

main:	; read values from IRSeeker

	hi2cin $49,(ac_direction,  sensor1_ac, sensor2_ac, sensor3_ac, sensor4_ac, sensor5_ac)	
	
	debug			; debug display
	pause 1000		; wait 1 second then loop
	goto main

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