Merge pull request #37 from silviaCC/simpletest_and_color_rgb_update

Update to the test file of the TCS34725 color sensor

Author: jposada202020

adafruit_tcs34725.py

@@ -134,12 +134,18 @@ def color_rgb_bytes(self):
  red, green, blue component values as bytes (0-255).
  """
  r, g, b, clear = self.color_raw
+
  # Avoid divide by zero errors ... if clear = 0 return black
  if clear == 0:
  return (0, 0, 0)
+
+ # Each color value is normalized to clear, to obtain int values between 0 and 255.
+ # A gamma correction of 2.5 is applied to each value as well, first dividing by 255,
+ # since gamma is applied to values between 0 and 1
  red = int(pow((int((r / clear) * 256) / 255), 2.5) * 255)
  green = int(pow((int((g / clear) * 256) / 255), 2.5) * 255)
  blue = int(pow((int((b / clear) * 256) / 255), 2.5) * 255)
+
  # Handle possible 8-bit overflow
  if red > 255:
  red = 255

examples/tcs34725_simpletest.py

@@ -12,11 +12,28 @@
 i2c = board.I2C() # uses board.SCL and board.SDA
 sensor = adafruit_tcs34725.TCS34725(i2c)
 
+# Change sensor integration time to values between 2.4 and 614.4 milliseconds
+# sensor.integration_time = 150
+
+# Change sensor gain to 1, 4, 16, or 60
+# sensor.gain = 4
+
 # Main loop reading color and printing it every second.
 while True:
+ # Raw data from the sensor in a 4-tuple of red, green, blue, clear light component values
+ # print(sensor.color_raw)
+
+ color = sensor.color
+ color_rgb = sensor.color_rgb_bytes
+ print(
+ "RGB color as 8 bits per channel int: #{0:02X} or as 3-tuple: {1}".format(
+ color, color_rgb
+ )
+ )
+
  # Read the color temperature and lux of the sensor too.
  temp = sensor.color_temperature
  lux = sensor.lux
- print("Temperature: {0}K Lux: {1}".format(temp, lux))
+ print("Temperature: {0}K Lux: {1}\n".format(temp, lux))
  # Delay for a second and repeat.
  time.sleep(1.0)