kopia lustrzana https://github.com/pimoroni/pimoroni-pico
67 wiersze
2.2 KiB
Python
67 wiersze
2.2 KiB
Python
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# This example takes the temperature from the Pico's onboard temperature sensor, and displays it on Pico Display Pack, along with a little pixelly graph.
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# It's based on the thermometer example in the "Getting Started with MicroPython on the Raspberry Pi Pico" book, which is a great read if you're a beginner!
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import machine
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import utime
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# Pico Display boilerplate
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import picodisplay as display
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width = display.get_width()
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height = display.get_height()
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display_buffer = bytearray(width * height * 2)
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display.init(display_buffer)
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# reads from Pico's temp sensor and converts it into a more manageable number
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sensor_temp = machine.ADC(4)
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conversion_factor = 3.3 / (65535)
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# Set the display backlight to 50%
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display.set_backlight(0.5)
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i = 0
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while True:
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# the following two lines do some maths to convert the number from the temp sensor into celsius
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reading = sensor_temp.read_u16() * conversion_factor
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temperature = round(27 - (reading - 0.706) / 0.001721)
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# this if statement clears the display once the graph reaches the right hand side of the display
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if i >= (width + 1):
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i = 0
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display.set_pen(0, 0, 0)
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display.clear()
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# chooses a pen colour based on the temperature
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display.set_pen(0, 255, 0)
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if temperature > 20:
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display.set_pen(255, 0, 0)
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if temperature < 13:
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display.set_pen(0, 0, 255)
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# heck lets also set the LED to match
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display.set_led(0, 255, 0)
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if temperature > 20:
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display.set_led(255, 0, 0)
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if temperature < 13:
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display.set_led(0, 0, 255)
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# draws the reading as a tall, thin rectangle
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display.rectangle(i, height - (temperature * 4), 5, height)
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# draws a white background for the text
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display.set_pen(255, 255, 255)
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display.rectangle(1, 1, 50, 25)
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# writes the reading as text in the white rectangle
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display.set_pen(0, 0, 0)
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display.text("{:.0f}".format(temperature) + "c", 3, 3, 0, 3)
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# time to update the display
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display.update()
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# waits for 5 seconds
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utime.sleep(5)
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# the next tall thin rectangle needs to be drawn 5 pixels to the right of the last one
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i += 5
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