better names, more documentation
@@ -3,14 +3,20 @@ import math
from adafruit_circuitplayground import cp
brightness = 0
-l10 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-l50 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+# List that holds the last 10 z-axis acceleration values read from the accelerometer.
+# Used for the n=10 moving average
+last10 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+
+# List that holds the last 50 z-axis acceleration values read from the accelerometer.
+# Used for the n=50 moving average
+last50 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-i = 0
+consecutive_triggers = 0
cp.pixels.fill((255, 0, 0))
light_on = False
@@ -19,27 +25,28 @@ while True:
x, y, z = cp.acceleration
# moving average n=10, not super smooth, but it substantially lowers the amount of noise
- l10.append(z)
- l10.pop(0)
- avg10 = sum(l10)/10
+ last10.append(z)
+ last10.pop(0)
+ avg10 = sum(last10)/10
# moving average n=50, very smooth
- l50.append(z)
- l50.pop(0)
- avg50 = sum(l50)/50
+ last50.append(z)
+ last50.pop(0)
+ avg50 = sum(last50)/50
# If the difference between the moving average of the last 10 points and the moving average of
# the last 50 points is greater than 1 m/s^2, this is true
if avg10 - avg50 > 1:
- if i > 3:
+ if consecutive_triggers > 3: # Is true when avg10-avg50 > 1m/s^2 at least 3 times in a row
# Detects shake. Due to the very low shake threshold, this alone would have very low
# specificity. This was mitigated by having it only run when the acceleration
# difference is greater than 1 m/s^2 at least 3 times in a row.
if not cp.shake(shake_threshold=10):
+ # Set brightness to max, timestamp when it was set to max, and set light_on to true
cp.pixels.brightness = 1
start = time.monotonic()
light_on = True
- i += 1
+ consecutive_triggers += 1 # increase it whether or not the light is turned on
# light_on variable is for short circuiting. Not really necessary, just makes things run faster
elif not light_on or time.monotonic() - start > 0.4:
@@ -47,7 +54,7 @@ while True:
# Max brightness can be adjusted with the coefficient.
cp.pixels.brightness = abs(math.sin(brightness)) * 0.5
brightness += 0.05
- i = 0
+ consecutive_triggers = 0
light_on = False
time.sleep(0.02)
