RoboticsConnection User Forum / RoboticsConnection Hardware Support / Robot Sensor Support

Problem with sensor compass in Proteus

Gltx — Wed, 21 Sep 2011 15:38:38 GMT

Hello :)

I have a problem with a compass CMPS03

For my school project I need to do a simulation in Proteus some components but nowhere to find a CMPS03 Compass, and I need the compass for his connection i2c, can you help me with this or some similar compass that can be used for the Proteus, Please.

regards

Truth or Lie????????????

AaronRiley — Thu, 12 Jan 2012 02:59:45 GMT

The technology had had such a waste move in recent year , what ever we think had come true.
Robotic science had Made such a great move it's beyond every one expectation .
now thier is nothing which a robot can do what a man can do , except feeling robot is capable to do each and every thing we suppose to do ..

Is this really happening ???

guys keep on updating with your view on Robotics science:)

i2c line following sensor analog mode arduino

Clphipps — Tue, 22 Nov 2011 14:16:41 GMT

I using the arduino mega to interface with the line following sensor. I have gotten the sensor to work in the digital mode. I however want the sensor to work in the analog mode. I think I am having a problem with the send command.

byte linefollowing[];

wire.beginTransmission(0x28);
wire.send(1);
wire.send(2);
wire.endTransmission();

Wire.requestFrom(0x28,7);
while(wire.available() != 7);
for (int i=0;i<7;i++){
linefollowing[i] = wire.receive();
Serial.print(linefollowing[i]);
}

I am not quite sure but when I run it I think that it hangs up at the while(wire.available() !=7);
So I am thinking that it never getting 7 bytes of information from the sensor.

any help would greatly be appreciated.
Casey

Line Following Sensor V3 on Arduino - change address issue

michael — Thu, 25 Aug 2011 15:53:36 GMT

Hello,

Just bought two Line Following Sernsors v.3

Single sensor with the default address works just fine on Arduino over I2C.

But I can't change the address for the second one. Looks that the following code deosn't work:

Wire.beginTransmission(0x28);
Wire.send(0x00);
Wire.send(0xA0);
Wire.send(0x00);
Wire.send(0xAA);
Wire.send(0x00);
Wire.send(0xA5);
Wire.send(0x00);
Wire.send(0x58);
Wire.endTransmission();

Could you please let me know what I'm doing wrong.

I have also tried the serial interface .. looks like it doesn't work. Could you please provide an example if possible.

Regards

Michael

I2C Sensor - Change address

naifatt — Fri, 30 May 2008 18:11:19 GMT

I have successfully used the I2C line sensor with the PICDEM 2 Plus board. The performance is very good but my only feedback is that should be an eight sensors version instead of the present 5. I am thinking of using two sensor boards. So I have been trying to change the sensors' default I2C address from 0x50 to 0X58. However, the change does not seems to happen. Am I missing something here?

i2c_start();
i2c_write(0x50);
i2c_write(0xA0);
i2c_write(0xAA);
i2c_write(0xA5);

i2c_write(0x58);

i2c_stop();

Rangewizard V1.1

MG25x4x — Thu, 03 Mar 2011 12:08:37 GMT

Hello All,

I fried a chip on my Rangewizard V1.1. I just bought a new hot air rework system and would like to try to replace it. The chip says "DT 1R" on it. It is located under neath the X-Bee port. The power supply I had attached to it malfunction. It gave the 7.2 dc instead of 5 over the I2C connection. After 5 to 10 minutes, I smelled smoke and it bulged like a baby budda.

If anyone can give me details of this chip and/or a schematic of this board, I would appreciate it. If this is private company info. I can respect that too. I saw in the forums that this board has been discontinued. Sad, this was a great idea.

Also, I was using a different microcontroller with the Rangewizard. It would talk to the BS2px from Parallax. I had a Ping))) connected to different ports on the board. I could see the sensor turn on and off via the Rangewizard but now I get no response. I am using a 3.9 k pull-up resistors on the SDA and SCL lines. If anyone could help I would appreciate it.

quadrature encoder

sam — Sun, 08 May 2011 05:04:24 GMT

hey,

for a project, we've bought two Dc-motors like this: http://www.robotshop.com/pololu-12v-100-1-gear-motor-encoder.html.

A motor like this has an quadrature encoder which provides 64 counts per revolution if the controller has the possibility to count the rising and falling edges of channel A and B. Can the serializer do this or does the serializer only counts rising edges?

Regards

Sam

I2C Line Following sensor help

N0M4dIC — Tue, 26 Apr 2011 22:18:55 GMT

Hi everyone (if there is anyone on this site), I just received my RC I2C Line Sensor and well... Things doesnt go as expected...
I am actually building an autonomous robot which will use, among other sensors, this line detector. This robot is based on the Parallax BASIC Stamp 2p24 microcontroller, so it includes I2C-specific commands like I2CIN.

So, to test the device, I made a testing program which retrieve the data from the sensor and display it on a serial LCD then repeat all over again. This program doesn't work. The only data the program show is always 255, which is only a full byte. I used the BASIC Stamp Manual and Syntax examples and I'm not sure to understand every parameters in this command (I'm an I2C noob, actually. I only have a basic understanding of this protocol).

Here it is (Mostly in french, sorry):

[quote]'************ DÉBUT D'ENTÊTE ******************************************
' Nom : I2Ctest
' Créé le : 12 avril 2011
' Modifié le : N/A
' Créé par : Dany B. Drolet
'
' Commentaires:
' Première tentative d'utilisation du protocole I2C.
'
' But:
' Recevoir et afficher graphiquement les données reçues du senseur détecteur de lignes.
'
'
'************** FIN D'ENTÊTE ********************************************

' {$STAMP BS2p}
' {$PBASIC 2.5}

'***************[ IDENTIFICATION I/O ]************************************
FollowerSerin PIN 0
FollowerCLK PIN 1
LeftEncoder PIN 2
RightEncoder PIN 3
MCserin PIN 4
MCreset PIN 5
RightPing PIN 6
CenterPing PIN 7
LeftPing PIN 8
LCDSerin PIN 9
Piezo PIN 10
SW1 PIN 11
SW2 PIN 12
SW3 PIN 13
SW4 PIN 14

'*************[ CONSTANTES ]********************************************

BaudRate CON 240 ' Baud Rate: 9600 = [ bs2 = 84 ] [ bs2p = 240 ]

CmConstant CON 904 ' 2260 for BS2 ; 904 for BS2P
InConstant CON 356 ' 890 for BS2 ; 356 for BS2P

'**************[ VARIABLES ]*********************************************

LFValue VAR Byte

'=======================================================================

'****************[ INITIALISATION ]****************************************

PAUSE 20

SEROUT LCDSerin, BaudRate, [ 22, 17, 12 ]

PAUSE 5

SEROUT LCDSerin, BaudRate, [ 148, "***INITIALISATION***" ]

GOSUB StartSound

SEROUT LCDSerin, BaudRate, [ 12 ]

PAUSE 5

SEROUT LCDSerin, BaudRate, [ 128 ]

'##### DÉBUT DE LA BOUCLE PRICIPALE ####################################

SEROUT LCDSerin, BaudRate, [ 128, "Test suiveur ligne:", 168, "Valeur:" ]

DO
I2CIN 0, $50, 0, [ LFValue ]
SEROUT LCDSerin, BaudRate, [ 177, "%", BIN LFValue ]
LOOP

'########## FIN DE LA BOUCLE PRICIPALE ##################################

GOSUB EndSound
END

'=====================================================================

'###### SOUS-ROUTINES ##############################################

'*************[ SOUS-ROUTINES CONSTANTES ]******************************

ResetMC:
LOW MCReset
PAUSE 2
HIGH MCReset

StartSound:
PAUSE 100
FREQOUT piezo, 566, 796
FREQOUT piezo, 566, 875
FREQOUT piezo, 566, 955
FREQOUT piezo, 566, 849
FREQOUT piezo, 472, 1000
PAUSE 200
RETURN

EndSound: 'A besoin d'être refait
PAUSE 250
FREQOUT piezo, 566, 796
FREQOUT piezo, 472, 875
FREQOUT piezo, 566, 955
FREQOUT piezo, 566, 849
FREQOUT piezo, 472, 1000
RETURN[/quote]

Thanks anyone for the help!

READ BEFORE YOU BUY I2C LINE SENSOR

draconis4756 — Wed, 16 Mar 2011 13:10:50 GMT

Well,

After two posts for support and much testing of this sensor. I am ditching it. I feel like it is the copy machine from the movie office space. Robotics connection provides no data sheet and zero support for their sensor. Do not be fooled by them telling you that its easy to use. They dont even have their most updated sensor on display on their website.

Found ttl support on the back of the sensor but guess what, they guy who designed this thing made the ports so small you cant solder them to the microcontroller. DO NOT BUY THIS SENSOR

I ended up getting a parallax line sensor. This thing is great! It comes with all the jumpers needed, data sheets, pot for adjusting filtering, full ttl, and guess what? you think posting a cad of some blinders was convenient for us? this sensor comes with them built in!!!!

Just go to parallax.com and order one. thank you robotics connection for an out dated website, no support, making this sensor harder than it should be, and frankly poor engineering and customer support.

I2C sensor programming help

draconis4756 — Tue, 08 Mar 2011 13:41:19 GMT

Hey guys,

I posted before to get help on my code but no one replied, i still cant get the sensor to work and thinking about ditching it, But i thought that id see if i can get help if i clean up my code a bit more. It is commented and im using an HCS12 develpoment board. Any help would be great.

#include

#define TERMINAL_TIMEOUT 100

#define IBDR _P(0xE4)

int dummy=0;

int line_sensor_data=0;

void main()

{

while(1)

{

IBFD=0x27; //baud rate=16.66 kHz,

IBCR=0xB0; //enable IIC bus, interrupt disable, master-transmit mode

IBCR |= 0x30; //sets as controller as Master, sets Tx - transmit mode

IBDR = 0x50; //sends slave address out, with write bit

while((IBSR&0x02)!=0x02){}; //waiting for transfer complete

IBSR |= 0x02; //clear IBIF flag

IBCR &= 0xEF; //sets Rx, recieve mode

while((IBSR&0x01)==0x01){}; //wait for ack.

dummy=IBDR; //dummy read

IBCR |= 0x10; //sets Tx, transmit mode

IBDR = 0x01; //sends slave internal address out

while((IBSR&0x02)!=0x02){}; //waiting for transfer complete

IBSR |= 0x02; //clear IBIF flag

IBCR &= 0xEF; //sets Rx, recieve mode

while((IBSR&0x01)==0x01){}; //wait for ack.

IBCR |= 0x12; //sets Tx - transmit mode, generate repeat cycle

IBDR = 0x51; //sends slave address out, with read bit

while((IBSR&0x02)!=0x02){}; //waiting for transfer complete

IBSR |= 0x02; //clear IBIF flag

IBCR &= 0xEF; //sets Rx, recieve mode

while((IBSR&0x01)==0x01){}; //wait for ack.

line_sensor_data=IBDR; //pull data

IBSR |=0x02; //clear the IBIF interupt flag

IBCR &= 0xDF; //generates stop by switching from master to slave

}

I2C line following sensor

draconis4756 — Wed, 26 Jan 2011 17:55:30 GMT

Im trying to get my line sensor to communicate to my HCS12. But i cant get anything out of the data register. I was hoping that i can get help with the programming. I looked at other threads but i couldnt figure out their code because everything is a subprogram and they didnt post what they wrote in that subprogram. Here is the code i have so far.

#include /* common defines and macros */
#include /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dg256b"

void init_I2C(void);
main(void){
DDRE= 0xFF; //setting port E as outputs
init_I2C();

while(1) {
if(IBDR == 0x00)
PORTE =0x0C; // set of 4 leds and when the sensor sees all black half light up
else if (IBDR == 0x7F)
PORTE = 0x03; // if all white is there then the other half of the LEDs light up.
else
PORTE = 0xFF; Otherwise they all 4 LEDs stay on

return(0);
}
}
void init_I2C(void){
IBCR = 0xB4; // 10110100
IBFD = 0x1F; // 240 (24mhz/100khz) -- 100kbit/s transfer rate
IBAD = 0x50;// address of the sensor
IBSR |= 0x02; //IBIF=1 - clears INT flag}

Thanks

I2C -- Many sensors

bergeon — Mon, 10 Jan 2011 11:45:40 GMT

Hi,

I need to put multiple sensors on the I2C bus (CMP03, MSU10, ...).

Can I connect directly them on the serializer ?

If I have no connection card for multiple I2C sensors, may I put them in parallel ??

Thanks a lot.

Goupil

I2C Line Following Sensor with MikroC

raiva — Tue, 14 Dec 2010 11:08:50 GMT

Hi!

We are developing a project with a robot and we use the I2C line following sensor with a 18F4685 PIC.

We've got a lot of problems to communicate with this sensor using I2C protocol specifically using c with a MikroC developpment kit.

The sensor does'nt write or read anything, the code in c that we use is the following:

[quote]

/*
* Copyright
(c) Mikroelektronika, 2005
* Description:
This is a simple 'Hello World' project. It turns on/off diodes connected to
PORTB
* Test configuration:
MCU: P18F4685
Dev.Board: EasyPIC4
Oscillator: HS, 08.0000 MHz
Ext. Modules: -
SW: mikroC v7.0
* NOTES:
None.
*/

char test;

void main()
{
TRISB = 0; // PORTB is output
TRISD = 0; // PORTD is output
PORTB = 0x00;
PORTD = 0x00;

Delay_ms(1000);

// I2C Settings
I2C_Init(100000);
PORTD.F0 = 1;
I2C_Start(); // Issue I2C start signal
PORTD.F1 = 1;
I2C_Wr(0x51);
PORTD.F2 = 1;
test = I2C_Rd(0u);
PORTD.F3 = 1;
I2C_Stop();
PORTD.F4 = 1;

PORTB = test;
PORTD.F5 = 1;

while(1)
{
}

}//~!

[/quote]

==> The programm stops at "test = I2C_Rd(0u);".
==> LEDS on PORTB are always switched off, in any case.

It's that correct?
Thanks for your attention.

CMUCAM2 OR 3 and sensors

DMacd — Fri, 22 Oct 2010 04:57:17 GMT

I need assistance to build a turret to track humans and use an airsoft gun - I know absolutly nothing about what I am doing however I know what I want to get done. I can manage a soldering iron but have never built a robot before and know nothing about writing code/sketches.

I have scouted numerous sites and have come to this conclusion. Please feel free to correct me

I need

1 x CMUCAM2 or 3

1 X TPA81 Thermopile

2 x servos

1 x Power supply

1 x Need to build a turret (this is not a problem)

Looking at some sites I see that one could buy a turret from CMUCAM and put all the sensors on it but it is discontinued from the manufacturer. Doe anyone know if someone has stock on this?

What I need to know is.

What sensor do you use to trigger the gun.

Would I need to get code for the camera to control all of this or can I hook all of this stuff up to the CMUCAM as it comes?

Are there other components that I may need to purchase?

Can someone give me a shopping list? I am in South Africa so everything is 3 weeks away by post, I want to purchase all the components I need once.

Once I can get this built, the next step is to put it onto a mobile platform

Any help will be greatly appreciated.

about using serializer with roborealm

robot maker — Fri, 08 Oct 2010 17:16:06 GMT

looking to use roborealm with serializer module and have a few questions about using sensors

one is how do i setup to use SRF04 or maxsonar on the digital I/O pins,only need the code help or setup

another question is using analog sensors like GP2D12 on the analog port,hooking not a problem ,but setup is what i need

other question is using TPA81 on the I2C BUS

12. Direct Serial Command Variable - As the serializer has many additional capabilities not reflected in the GUI the direct serial command variable will send the text contained in the specified variable to the serializer and place the returned results back into that same variable. Thus you can specify a variable (or type a new one) into the provided textbox and set the value to any of the serial commands that the serializer understands. For example, you can use

SetVariable "my_command", "i2c r 4 1"

in a VBScript module to query the line following sensor

what api commands do i use ,mostly to read the 8 temperatures

any examples on these questions will help me alot

5 sensor line follower

kbrad1 — Sun, 19 Sep 2010 22:33:39 GMT

Hi,

I just received a 5-sensor line follower board that appears to have a new connector (GND, 5V, TX, RX). Before I begin to play, I thought I should ask what this is for and how it works.

Thanks,
Ken.

XL Maxsonar

Tyler — Mon, 27 Sep 2010 19:12:48 GMT

I have been using the Maxsonar for quite some time with good results. I recently switched to the XL maxsonar with the exact same wiring and am not getting results. Does this sensor require different firmware or code? Thanks in advance!

MaxSonar EZ1 and analog pin

cloud_skyblue — Fri, 03 Sep 2010 15:05:21 GMT

Greetings,

I recently hooked up the MaxSonar EZ1 to my serializer board and it works quite well. I'm using pretty much the standard way of connecting these guys (for instance, GPIO pin 0 used for RX trigger, pin 1 used for Vcc, Gnd, PW). However, since I might be hooking up more sensors to the board, I was wondering if there is a way to retrieve sensor data via the analog pins instead of the GPIOs? Or even, perhaps there is a way to use analog pins for trigger and GPIO for PW? I was hoping not to saturate all my GPIO pins in case some other sensor might need them...

I2C line following sensor - can't read

johnb — Fri, 11 Jun 2010 04:43:01 GMT

Hello I have been trying for 2 days to read the sensor but without success.
I'm using a pic18f248 with 1.8k pull up on sda & scl and the c18 compiler

here is my code maybe you guys can find anything wrong ?
I don't know if my I2C_read routine is correct.
Maybe my initialization isn't correct ? I've read many topics on internet and there was sometimes " #pragma config BOR = ON " but I didn't see anything about that on the 18f248 datasheet.

#include
#pragma config OSC=HS
#pragma config WDT=OFF
#pragma config LVP=OFF

void I2C_idle(void)
{
int boucle;

while(boucle == 0)
{
if((SSPCON2bits.ACKEN == 0) && (SSPCON2bits.SEN == 0) && (SSPCON2bits.RSEN == 0) && (SSPCON2bits.PEN == 0) && (SSPCON2bits.RCEN == 0) && (SSPSTATbits.R_W == 0))
boucle=1;
}
}

void I2C_start(void)
{
I2C_idle();
SSPCON2bits.SEN = 1;
}

void I2C_write(char donnee)
{
I2C_idle();
SSPBUF = donnee;
}

void Ack_slave_master(void)
{
I2C_idle();
while(SSPCON2bits.ACKSTAT==1);

}

void Repeated_start(void)
{
I2C_idle();
SSPCON2bits.RSEN = 1;
}

void I2C_read(void)
{
I2C_idle();
SSPCON2bits.RCEN=1;
while(SSPCON2bits.RCEN==1);
}

void Ack_master_slave(void)
{
I2C_idle();
SSPCON2bits.ACKDT = 0;
SSPCON2bits.ACKEN = 1;
}

void I2C_NOACK(void)
{
I2C_idle();
SSPCON2bits.ACKDT = 1;
SSPCON2bits.ACKEN = 1;
}

void I2C_stop(void)
{
I2C_idle();
SSPCON2bits.PEN = 1;
}

void pause(void)
{
unsigned int time = 0;

while(time < 10000)
time++;
}

void main(void)
{
unsigned char test;
SSPSTATbits.SMP = 1;
SSPSTATbits.CKE = 0;
SSPADD = 0x31; //master mode
SSPCON1 = 0x28; //SCL ~100k
TRISB = 0x00;
TRISC = 0x18;
I2C_start();
I2C_write(0x50);
I2C_read();
I2C_stop();
PORTB=SSPBUF; //display the result
while(1);

}

with this code the only thing displayed is the value inside write

I2C sensor....What colors it can see???

e.dr.sami — Fri, 24 Apr 2009 09:17:23 GMT

Hi.......
Is there any one can tell me how to detect colors using the I2C line following sensor...
Same with Single line following...???

Please I need An answer ASAP.....!!!!!!

Hamamatsu P5587 Encoder Module

Dexter Griffith — Fri, 09 Apr 2010 15:00:25 GMT

Does anyone know the best website from which to buy a Hamamatsu P5587 Encoder Module, since Robotics Connection no longer sells them? Is this the best Encoder to use with Robotics Connection electronics?

P5587 Encoder Module

eustace — Sat, 26 Jan 2008 18:52:27 GMT

Can someone point me to the datasheet/docs for the Hamamatsu P5587 Encoder Module? I just bought two sets, and the package says "Pinout can be found online." Where? It doesn't show up under sensors (discontinued? out of stock?). Is there a missing link on the site?

Help with Single Line Followin Sensors

In6thGear — Sat, 17 Apr 2010 18:11:04 GMT

Hello, our group has purchased 3 of the single line following sensors to create a basic line following robot.

The problem is I can't seem to get these sensors to output 5V on the "sig" pin. There are 3 pins on these sensors GND, Vcc, and Sig. The way I understand is that the Signal pin outputs 0v or 5v, depending on if it sees white or black, respectively.

I have tried various combination of a black line on a white background with different materials, and I've had the same results. I get about a 0.02 V difference from 0.11 for white and about 0.13 for black. I just can't get 5V. I've tried orienting the sensor at various angles, moving the sensor closer; same result.

Am I missing something here? Thanks.

Line following sensor v.2.0 problem

ZephyrTR — Sat, 27 Mar 2010 10:57:38 GMT

Hi all,

I am a last year student in electrical engineering and I recently decided to add I2C line following sensor module of Robotics Connection to my robot project.Well I was very exited when I firstly saw the module on the web,but things got very problematic for me.After strugling with 0x50 or 0x51 addres confusion due to the lack of the datasheet provided,soon I get the module working by changing the reading adress to 0x51.

To test the module I connected it to PIC 16f877 via built in I2C pins and connected 5 LED's to port B and wrote the following code in CCS C. I associated each LED with a sensor.

Sensor1->LED1 (port b0)
Sensor2->LED2 (port b1)
Sensor3->LED3 (port b2)
Sensor4->LED4 (port b3)
Sensor5->LED5 (port b4)

At the beginning all LED's are ON since module returns 11111111 value.When I put my finger in front of any of the sensors,the LED that is associated goes OFF.So when I put my hand in front of the first sensor,then the first LED connected to port_b0 goes OFF.When I put my hand in front of the second sensor,then the second LED connected to port_b1 goes OFF.It goes like this.

But when things come to sensing black electrical tape of a white course,then I realized that [b]this module is not sensing white and black at all![/b] When I put the line follower on the white course all LED's go blank.But when I put in on a black course,again all LED's go blank.
:(
Am I doing something wrong or this $29 module is totally useless?

*******************
byte renk_oku() // I2C reading function
{
byte veri; // 8 bit variable to hold sensor data
i2c_start(); // protocol start
i2c_write(0x51); // call the line follower module
veri = i2c_read(0); // read the data from linefollowermodule
i2c_stop(); //protocol stop
return veri;
}

void main ()
{

set_tris_b(0x00); // Port B all output
output_b(0x00); // Port B all to 0V

start:

byte data=0;
data=renk_oku();
delay_ms(10);
output_b(data);
delay_ms(10);

goto start;
}
****************

Parallax Ping))) Update Frequency

dizzy — Mon, 29 Mar 2010 22:01:44 GMT

Hi,

Here are some numbers from the Parallax Ping)))'s datasheet:

•Input Trigger: positive TTL pulse, 2 µs minimum, 5 µs typical
•Echo Pulse: positive TTL pulse, 115 µs to 18.5 ms
•Echo Hold-off: 750 µs from fall of trigger pulse
•Burst Frequency: 40 kHz for 200 µs

I'm wondering what does Ping.UpdateFrequency refer to as far as the .net API is concerned and what is the minimum value that can be used.

Thanks

Difference in GP2D12 and Ping))) readings

dizzy — Mon, 29 Mar 2010 01:34:46 GMT

Hi, have 3 IR sensors and one Parallax Ping))) sonar on my traxster. I'm seeing some significant disparity in readings from the Ir sensors vs those from the Ping sonar. The readings from the IR sensor appear to be double that of Ping (i.e. a reading of 10 inches from the Ping sonar is read as ~20in for the GP2D12 sensors. The Ping reading appears to be correct based on manually checking the readings using a measuring tape.

Is there a reason why these readings are so different?

I2C line following sensor with cubloc cb220

faren22 — Tue, 02 Dec 2008 10:27:18 GMT

hi everybody

ok first i'm french sorry for my bad language i've ridden the two post concerning the i2c line following sensor problems and i have the same problem than Me.7koomi . When i try to connect the cubloc with the sensor i have 255 as a value and it never change , I put 2 pullups resistors of 4.7k on sda and scl

my program is in cubloc basic you can see the doc of cubloc here : http://cubloc.com/download/cubloctouchmanual.pdf

Const Device = CB220 'it says that the cubloc is a cb220
Dim data As Byte
Dim resp As Byte
Set I2c 9,8 'set scl=8 and sda=9 i have tried to switch the pins but it doesnt workDo
I2cstart
resp = I2cwrite(0x50)
data = I2cread(0)
I2cstop
Debug resp 'this command prints to the screen the value of resp
Debug data 'this command prints to the screen the value of resp

is this code wrong ?

thanks

I2C Line Following Sensor V2.0 Blinders

jsummerour — Wed, 03 Jun 2009 20:34:45 GMT

For those customers wishing to use blinders on their I2C Line Following Sensors (v2.0), here is a dimensioned drawing for making your own. You need 4 of them, and they will slide in between each of the 5 ir emitter/receiver sensor pairs. We're going to start including them w/ the sensors, but until they arrive, you can make your own. This basically prevents ir light from adjacent sensors from affecting ir receivers.

Be sure to use material that is opaque to infrared light. Plastic that's between 0.050" and 0.063" thick, such as black ABS should work fine. Do not use metal, as it will damage the line following circuit board when you slide the blinders on.

Blinder Dimensions 3D Blinder Image

Best Regards,

I2C Line Following Sensor V2.0 get exact values

marc — Wed, 02 Dec 2009 04:28:42 GMT

hello robot friends,

only one question...

i have the serializer 3.0 and line following sensor 2.0.
i programming on c++ platform with code from James Y. Wilson.
is it possible to get exact values from sensor or there are only two values true and false.

because, when i put my robot on floor all 5 sensors says me they have detect a line.
i have tried to build my own blinders but whithout success.

best
marc

Maxbotix MaxSonar-EZ1 Pins used to interface the Serializer and RangeWizard

jsummerour — Wed, 02 Apr 2008 19:49:43 GMT

Note to self...

We use the RX pin for trigger, and the PW pin for echo on the MaxSonar-EZ1 sensors when using the Serializer and upcoming RangeWizard...

Now if I forget, I'll know where to look, and I won't have to keep asking Ringo! :satisfied:

MaxEZ1 Sensors not returning value on pins 0,3 or 8,9

Xphile1999 — Thu, 27 Nov 2008 19:41:02 GMT

Hello

I'm having some issues with ranging from a MaxEZ1 sensor.

When hooked to pins 0,3 (trigger and output) it never returns a value (from hyper terminal i get a NACK)

same with 8,9.

4,5 work as well as 6,7.

When hooked to 0,3 or 8,9 the sensor is firing (i can hear it pulsing at the specified update frequency)

I am using the following:

serializer = new Serializer();

serializer.PortName = "COM3";

serializer.BaudRate = 19200;

maxEZ = new MaxSonarEZ1(serializer);

maxEZ.UpdateFrequency = 50;

maxEZ.DistanceChangedThreshold = 1;

maxEZ.TriggerPin = GpioPinId.Pin0;

maxEZ.OutputPin = GpioPinId.Pin3;

maxEZ.DistanceChanged += new SerializerComponentEventHandler(maxEZ_DistanceChanged);

serializer.Run();

the distance changed routine is never called.

any ideas?

Many thanks,

-Xphile1999

Question about the ultrasonic ranger

beni1255 — Sat, 19 Dec 2009 11:00:27 GMT

I wanted to ask if you sending the pulse every 50 ms?

If I have 2 sensor does it's waiting 50 msec?

and does the sensor reads are paralles or one after one

Thanks

Benjamin

Big problem with srf05 Help please

beni1255 — Sun, 13 Dec 2009 10:45:01 GMT

Hi every body,

Im new with the sirializer and I tryed to read srf05 in C#

In the putty software I can read the sensor and get good value

But when I'm using the sample code in c# the event is not responfing the sensor get trigger and even send echo

but there is no event and the sensor value is 0

Please help me it's really big issue

More one question is if the pid alogrihtem will work with 90 ticks encoder?

Please Its important

I bought 2 ver 3 boards the same problem in both of them

Problem changing I2C Line Following Sensor Address

Electron — Mon, 09 Nov 2009 19:58:14 GMT

Hi,

I'm trying to change the address of an I2C Linefollowing sensor with no luck.

I send the following data onto the I2C bus

0x50, 0xA0, 0xAA, 0xA5, 0x54

i.e. device address specifying a write, command, command, command, new address

The line sensor acknowledges the address and write, and I can confirm on an oscilloscope that address and data are sent, and that a I2C stop condition is transmitted but the device address does not change.

I've tried this on several line sensors with no success.

Reading the I2C sensor on the other hand, has been successful.

I2C bus setup is as follows;

100Khz, Buffered mode (i.e. 330 ohm pullups installed on SCL and SDA lines) and a bidirectional I2C bus buffer chip, Phillips 82B715.

I2C sensor is the only device on the bus.

Any advice would be appreciated.

Ultrasonic Sensor

Mohammad Al-Shamsi — Mon, 25 Aug 2008 12:54:39 GMT

Hi All,

How can i use PING)))™ Ultrasonic Distance Sensor from Parallax in C# console application?

Thanks.

Sharp IR Sensors

nrm002 — Tue, 18 Nov 2008 11:14:21 GMT

What is the precision of the GP2Y0A700K? How precise is it when measuring something 8 ft away as opposed to measuring something 17 ft away? Within what percentage of the actual length is the measured value?

Thanks!

CMUCam2+ camera

vladibo — Wed, 10 Jun 2009 16:35:42 GMT

On CMUCam2+ camera there is that message:

IMPORTANT NOTE: Since the board is designed to work with microcontrollers, it has a serial interface using TTL voltage levels (0-5V). When using the CMUcam2+ with an RS-232 serial port, such as on a PC or USB-to-serial adapter, you will need a level-shifter to convert TTL signals to RS-232 signals. You can purchase a Serial Interface Connector to convert the signals.

Does this mean that I have to buy this:

http://www.roboticsconnection.com/p-74-serializer-rs232-module.aspx

And if not can you point to the right Serial Interface Connector?

IO Wizard Analog Woes

electronguy — Sat, 07 Mar 2009 12:02:25 GMT

Greetings,

Using the I/O Wizard V1.0 through the Serializer board, since my I2C is currently occupied on my mothership (oops--motherboard :D).

When issuing a "i2c r 100 20" command, I get the following values with nothing connected to the analog ports (ordered as pairs): 0,11 0,58 0,45 0,30 0,18 plus the digital I/O which I'll ignore.
These are the correct values for the little bit of noise on the lines with nothing connected (i.e., all about 0V).

When I put 5V to AD0, I get:
3,253 3,167 2,43 1,140 0,251

5V to AD1 gives:
0,45 0,84 0,64 0,44 0,27

5V to AD2 gives:
0,229 3,255 3,174 2,43 1,88

5V to AD3 gives:
0,10 0,58 0,44 0,29 0,16

Finally, 5V to AD4 gives:
1,40 0,241 3,247 3,255 1,188

I wouldn't expect so much bleed-through on the even-numbered ports, and the odd-numbered ports don't seem to respond. With 5V on AD0, I get the correct value of around (3*256)+253=1021. I don't expect to see that value on AD1. In fact, grounding the signal at AD1 has no effect whatsoever, and I still get a response like full value.

Since I'm not connected directly to I2C and am using the Serializer's generic I2C command, will someone please confirm if there is a bug in the serializer's firmware or if the I/O wizard actually returns these types of values on odd-numbered ports?

Thanks,
--Scott

IOWizard not working with a Basic Stamp controller

modemman — Mon, 11 May 2009 21:56:26 GMT

Hi,

I bought an IOWizard board with the thought of expanding my Basic Stamp I/O ports (BS2P) as this was advertised as a generic I2C board. I was able to communicate with the board, but I'm having the following issues:

1. The analog input readings are jittery ("dancing numbers") and don't make too much sense. I hooked up a few Sharp IR rangers and the readings have no pattern, and make no sense - it seems like just random numbers.

2. I am able to change the state of the GPIO pins to Output/Low and Output/High - they change to all 0 or all 1. I tried LEDs for test, etc. That part works.

However, when I switch them all to Input, GPIO 0, 8 and 9 turn 1, the rest turn 0. I attach digital IR sensors (that should be at 1 when no detection and switch to 0 when detecting object) and GPIO 0, 1, 2 and 3 all switch GPIO 0 from 1 to 0 and back, but the bytes corresponding to 1, 2, 3 don't change ever!! Then, 4, 5 and 6 don't react to any kind of input. 7 seems to work intermittently. Only 8 and 9 work as expected.

Here's a reading I'm getting, with an analog ranger on port 1 ADC and digital sensors on ports 0, 1, 2, 3 GPIO:

analog pin 0: 01055
analog pin 1: 00546
analog pin 2: 00403
analog pin 3: 00409
analog pin 4: 01176
-----------------------
digital pin 0: 00000001
digital pin 1: 00000000
digital pin 2: 00000000
digital pin 3: 00000000
digital pin 4: 00000000
digital pin 5: 00000000
digital pin 6: 00000000
digital pin 7: 00000000
digital pin 8: 00000001
digital pin 9: 00000001

The analogs should have some meaning and not dance randomly, and for GPIO - 0, 1, 2, 3 should be 1s, the rest should be 0 (the way I had the sensors at the time the snapshot was taken).

4. After a few minutes of fiddling with the board, all of a sudden everything turns to 1s and there is no way to reset other than cutting the power completely.

Do I have a defective board, or there is no way to interface this with a BS2P?

Thank you.

I2C Dimensions

e.dr.sami — Sun, 15 Feb 2009 03:46:39 GMT

Hi,

I have to use the I2C for my robot as a line follower , but i need to know all dimensions of the circuit of the kit and the distance between adjacent channels (for 5 channel I2C).;)

please i need a respond from any one here ASAP.

Regards,

Sami