dc43693f17
To "clean up" the Learn System repo, we need to move groups of guides into subdirectories. This PR duplicates the CLUE guides into the CLUE subdirectory so guides may be changed prior to deleting redundant project repos to make more space.
109 lines
3.4 KiB
Python
109 lines
3.4 KiB
Python
# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
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# SPDX-License-Identifier: MIT
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import time
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import board
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import simpleio
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import adafruit_bmp280
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import pwmio
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import displayio
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from adafruit_motor import servo
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import terminalio
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from adafruit_clue import clue
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from adafruit_display_text import label
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# pwm setup for servo
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pwm = pwmio.PWMOut(board.D0, duty_cycle=2 ** 15, frequency=50)
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gauge = servo.Servo(pwm)
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# bmp280 sensor setup
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i2c = board.I2C() # uses board.SCL and board.SDA
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# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
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bmp280 = adafruit_bmp280.Adafruit_BMP280_I2C(i2c)
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# change depending on your location's elevation
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NOMINAL_PRESSURE = 1005.94
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PRESSURE_RANGE = 40 # hPa, expected pressure range variance caused by local weather
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PRESSURE_LOW_LIM = NOMINAL_PRESSURE - PRESSURE_RANGE
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PRESSURE_HIGH_LIM = NOMINAL_PRESSURE + PRESSURE_RANGE
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# board display
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# scaling for terminalio font
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display = board.DISPLAY
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group = displayio.Group(scale=3)
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# text elements
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temp_header = "Temperature:"
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press_header = "Pressure:"
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temp_text = " ºC"
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press_text = " hPa"
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font = terminalio.FONT
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blue = 0x0000FF
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red = 0xFF0000
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# temperature text elements
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temp_label = label.Label(font, text=temp_header, color=red, x=5, y=10)
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temp_data = label.Label(font, text=temp_text, color=red, x=5, y=25)
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# pressure text elements
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press_label = label.Label(font, text=press_header, color=blue, x=5, y=50)
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press_data = label.Label(font, text=press_text, color=blue, x=5, y=65)
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# adding text to display group
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group.append(temp_label)
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group.append(press_label)
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group.append(temp_data)
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group.append(press_data)
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display.root_group = group
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# function to convert celcius to fahrenheit
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def c_to_f(temp):
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temp_f = (temp * 9/5) + 32
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return temp_f
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# function to convert hPa to inHg
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def hpa_to_inHg(hPa):
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inches_mercury = hPa * 0.02953
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return inches_mercury
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# time.monotonic clock
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clock = 0
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# units state
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metric_units = False
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while True:
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# non-blocking 2 second delay
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if (clock + 2) < time.monotonic():
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# map servo range to barometric pressure range
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servo_value = simpleio.map_range(bmp280.pressure,
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PRESSURE_LOW_LIM, PRESSURE_HIGH_LIM, 180, 0)
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# set servo to pressure
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gauge.angle = servo_value
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# print data for debugging
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print("\nTemperature: %0.1f C" % bmp280.temperature)
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print("Pressure: %0.1f hPa" % bmp280.pressure)
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print(servo_value)
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# if metric units...
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if metric_units:
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# update temp & pressure text in celcius and hPa
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temp_data.text = "%0.1f ºC" % bmp280.temperature
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press_data.text = "%0.1f hPa" % bmp280.pressure
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# if imperial units...
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else:
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# convert celcius to fahrenheit
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temp_fahrenheit = c_to_f(bmp280.temperature)
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# convert hPa to inHg
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pressure_inHg = hpa_to_inHg(bmp280.pressure)
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# update temp & pressure text
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temp_data.text = "%0.1f ºF" % temp_fahrenheit
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press_data.text = "%0.1f inHg" % pressure_inHg
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# reset time.monotonic() clock
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clock = time.monotonic()
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# if a button is pressed, metric_units is True, show metric
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if clue.button_a:
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metric_units = True
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# if b button is pressed, metric_units is False, show imperial units
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if clue.button_b:
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metric_units = False
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