Create time-light-temp.py

Initial commit

Make_It_Log/time-light-temp.py

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+# Circuit Playground Express Data Time/Light Intensity/Temp
+# Log data to a spreadsheet on-screen
+# Open Spreadsheet beforehand and position to start (A,1)
+# Use slide switch to start and stop sensor readings
+# Time values are seconds since board powered on (relative time)
+
+import time
+from digitalio import DigitalInOut, Direction, Pull
+import analogio
+import board
+from adafruit_hid.keyboard import Keyboard
+from adafruit_hid.keycode import Keycode
+from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
+import adafruit_thermistor
+
+# Switch to quickly enable/disable
+switch = DigitalInOut(board.SLIDE_SWITCH)
+switch.pull = Pull.UP
+
+# light level
+light = analogio.AnalogIn(board.LIGHT)
+# temperature
+thermistor = adafruit_thermistor.Thermistor(board.TEMPERATURE, 10000,
+                                            10000, 25, 3950)
+
+# Set the keyboard object!
+# Sleep for a bit to avoid a race condition on some systems
+time.sleep(1)
+kbd = Keyboard()
+layout = KeyboardLayoutUS(kbd)  # US is only current option...
+
+led = DigitalInOut(board.D13)   # Set up red LED "D13"
+led.direction = Direction.OUTPUT
+
+print("Time\tLight\tTemperature")  # Print column headers
+
+def slow_write(string):   # Typing should not be too fast for
+    for c in string:      # the computer to be able to accept
+        layout.write(c)
+        time.sleep(0.25)  # use 1/4 second pause between characters
+
+while True:
+    if switch.value:    # If the slide switch is on, don't log
+        continue
+
+    # Turn on the LED to show we're logging
+    led.value = True
+    temp = thermistor.temperature  # In Celsius
+    # if you want Fahrenheit, uncomment the line below
+    # temp = temp * 9 / 5 + 32
+    # Format data into value 'output'
+    output = "%0.1f\t%d\t%0.1f" % (time.monotonic(), light.value, temp)
+    print(output)         # Print to serial monitor
+    slow_write(output)    # Print to spreadsheet
+
+    kbd.press(Keycode.DOWN_ARROW)  # Code to go to next row
+    time.sleep(0.01)
+    kbd.release_all()
+    for _ in range(3):
+        kbd.press(Keycode.LEFT_ARROW)
+        time.sleep(0.01)
+        kbd.release_all()
+        time.sleep(0.01)
+
+    led.value = False
+#   Add time.sleep(1.0) to wait more between samples
+#   Change 1.0 to whatever time you need