can't find I2c sensor register hex

Using Arduino Networking, Protocols, and Devices
#1

HI,

I’m working with a rev sensor(color sensor-see in description). I know it’s hexa adress, but i can’t figure out the register hex for reading red,blue,green color. They do not provide a datasheet. I tried to do a “for in for”, as from 0 —>0x99 to write and read registers but nothing.
After some research, i’ve found this LINK :http://www.mouser.com/ds/2/588/TMD3782_Datasheet_EN_v2-475385.pdf, where it seems to be a sensor almost like this.
When i try to use that register hex(i tried almost all of them) it does nothing but shows an integer continously.

hex_color.png
hex_color.png632×657 66.5 KB

spec_color.png
spec_color.png994×359 15.2 KB

#2

And this is the way i tried to cover register hex
for (b=0x00;b<=0x99;b++){

Wire.beginTransmission(0x39);
Wire.write(b);//
delay(100);
Wire.endTransmission(0x39);
Serial.println(Wire.read());
delay(150);}

#3

where it seems to be a sensor almost like this.

Does that mean you don't even have a type string or the like from your sensor? What does "almost like this" mean? Does it just look similar? Does it claim to be compatible?

They do not provide a datasheet.

Then don't buy it. You'll never find out where the registers are and what their function is.

And this is the way i tried to cover register hex

Don't post code excerpts, always post complete code! And use code tags!!!

Your code won't work. Wire.read() never returns anything other than -1 if not preceded by a successful call to Wire.requestFrom().

#4

Ask REV robotics for the data sheet.

#5

@jremington: Just out of curiosity: How do you know which device the OP uses? Were the posted PNGs enough to recognize the datasheet?

#6

The OP hinted that he bought the device at REV robotics. Google produced this page and sure enough, the lazy idiots do not provide a data sheet.

REV robotics does, however, provide this totally convincing user review:

THIS THING CHANGED MY LIFE!!! NOW I CAN SEE ALL COLORS, JUST WITH THIS SENSOR!! IT IS AWESOME. I THINK I AM IN LOVE WITH THIS PRODUCT.
COLOR SENSOR LOVER on Oct 12th 2017

What more would anyone need to know?

#7