kopia lustrzana https://github.com/pimoroni/pimoroni-pico
74 wiersze
2.3 KiB
Python
74 wiersze
2.3 KiB
Python
import time
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import machine
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from gfx_pack import GfxPack
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from breakout_bme68x import BreakoutBME68X, STATUS_HEATER_STABLE
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"""
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GFX temp DEMO
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This demo uses a BME680 or BME688 attached to the QWST connector to
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measure temperature, pressure, and humidity and display it on the GFX display,
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or the internal temperature sensor can be used in place of the
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BME68x breakout. Just change use_bme68x_breakout to False
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"""
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# Settings
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lower_temp_bound = 15
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upper_temp_bound = 30
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use_bme68x_breakout = True
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sensor_temp = machine.ADC(4)
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conversion_factor = 3.3 / (65535) # used for calculating a temperature from the raw sensor reading
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gp = GfxPack()
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gp.set_backlight(0, 0, 0) # turn the RGB backlight off
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display = gp.display
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display.set_backlight(0.4) # set the white to a low value
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bmp = BreakoutBME68X(gp.i2c)
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# If this gives an error, try the alternative address
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# bmp = BreakoutBME68X(gp.i2c, 0x77)
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display.set_pen(0)
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display.clear()
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display.set_font("bitmap14_outline")
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while True:
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# Clear display
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display.set_pen(0)
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display.clear()
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display.set_pen(15)
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display.text("GFXPack Temp demo", 0, 0, scale=0.1)
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if use_bme68x_breakout:
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temperature, pressure, humidity, gas, status, _, _ = bmp.read()
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display.text("Temp: {:0.2f}c".format(temperature), 0, 20, scale=0.2)
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display.text("Press: {:0.2f}Pa".format(pressure), 0, 35, scale=0.2)
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display.text("Humid: {:0.2f}%".format(humidity), 0, 50, scale=0.2)
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heater = "Stable" if status & STATUS_HEATER_STABLE else "Unstable"
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print("{:0.2f}c, {:0.2f}Pa, {:0.2f}%, {:0.2f} Ohms, Heater: {}".format(
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temperature, pressure, humidity, gas, heater))
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else:
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reading = sensor_temp.read_u16() * conversion_factor
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temperature = 27 - (reading - 0.706) / 0.001721
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display.text("Temperature", 25, 15, scale=0.2)
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display.text("{:0.2f}c".format(temperature), 25, 30, scale=2)
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if temperature < lower_temp_bound:
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r = 0
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b = 255
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elif temperature > upper_temp_bound:
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r = 255
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b = 0
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else:
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r = (temperature - lower_temp_bound) / (upper_temp_bound - lower_temp_bound) * 255
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b = 255 - ((temperature - lower_temp_bound) / (upper_temp_bound - lower_temp_bound) * 255)
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gp.set_backlight(r, 0, b)
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display.update()
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time.sleep(0.2)
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