Use the Adafruit TCS34725 with a Raspberry PI, in Java
The board we are talking about here is this one.
We will also use a 3-color LED, like this one.
We assume you've enabled I2C on the Raspberry PI.
What this demo does
We want to use the TCS34725 to recognize a color. In the demo, we will put a CD sleeve on its sensor, and see what color it is.
To prove it, we will light up a 3-color LED, showing that the color has been identified.
Attention! Unlike the Arduino, the Raspberry PI cannot emit analog signals! We will turn the 3-color LED to red, blue, or green. Nothing else!
See it as if you were asking the Raspberry PI about the color you show to the TCS34725 a question like
"Is it more blue, more green, or more red?".
We will address that issue in another demo, using a Digital to Analog Converter (DAC), or Pulse Width Modulation (PWM), which is suitable for lights.
You might want to put some resistor between the 3-color led and the Raspberry PI, I'll let you come up with the right one (in other words, don't blame me if you blow out your led).
|TCS34725||Raspberry PI||3-color LED|
|3V3||1. 3V3 VDC Power|
|GND||6. 0V (Ground)||Long pin (ground)|
|SDA||3. SDA0 (I2C)|
|SCL||5. SCL0 (I2C)|
|11. GPIO 0||red pin|
|12. GPIO 1||green pin|
|13. GPIO 2||blue pin||
Launch the script located in the
I2C.SPI directory, named
And here is what it could look like:
Oliv did it