RoboticsConnection User Forum / RoboticsConnection Hardware Support / Robot Sensor Support

Ambient Temperature Sensor

acortez — Wed, 11 Jun 2008 13:14:46 GMT

Is there any way of making the temperature readings faster? They are rather slow and I was wondering if it had anything to do with the capacitor in the circuit. Can I speed up the readings from the temperature sensor?

Thanks,
Andres Cortez

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();

I2C Line Following Sensors Help

adilmemon — Tue, 22 Apr 2008 05:33:31 GMT

Hi all,
I currently got the sensors after a long wait but after a lot of reading in the data-sheets, I couldn't know how to use the sensors.
Can anyone help me in reading the output of the sensors.
I use a PIC18F452 microcontroller. I have to follow a white line on a black floor. There are some turns.
The main problem is how to read the byte.
Please give me some example program.
Regards

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:

Problem communication with I2C Line Following Sensor

Me.7koomi — Tue, 25 Mar 2008 04:36:29 GMT

Hi, Everybody

I'm trying to Interface I2C Line Following Sensor with my PIC16F877 and im use CCS compiler.It seems like it should be fairly straightforward. So what im trying to do as a beginnig is to read white line on the black ground.i made the following connection from the the Sensor:

Vcc: connected to the +5V.

Gnd: connected to the same ground of the PIC.

Sda: connected to the Pin_C3.

Scl: connected to the Pin_C4.

Im using built in pullup resistors for Scl and Sda. When i turned the power on, the bi-color red/green LEDs were turned on, so the sensor is functioning perfectly.

I'm using the following statement in my Pic Headers:
[code]#use I2C(MASTER, SLOW,sda=PIN_C3,scl=PIN_C4)[/code]

Then I tried to read from the sensor by issuing the following code:

[code]int read_color()
{
int8 data;

i2c_start();
i2c_write(0x50); // Address of the sensore (default address)
i2c_write(0x00); // I don't want to write any thing to the registers
i2c_stop();
i2c_start();
i2c_write(0x51); // Address plus 1 LSB for Read Mode
data = i2c_read();
return data;
}[/code]

I put the sensor on the black ground, and I run the program. I checked the value of the data and i got 255. i changed the position of the sensor and i put it on the white ground, the reading should be 0 but i got 255 instead of the 0 !! what its mean (255)? is it means there is no connection?

Any ideas about what I need to do to connect the sensor with the Pic? and is there any wrong with the code ?

Thanks

Serializer

cedric71 — Fri, 08 Feb 2008 03:53:57 GMT

Hi Jason,

More than one month ago, I sent you my Serializer back to you because I failed to upgrade the firmware to 1.5. The RMA is 00007.

Could you please confirm me that you receive the box and tell me if you already sent it back yo me?

Thank you,

Cedric.

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?