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79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
5 years ago
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from dht import DHT11
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from machine import Pin, SPI, ADC
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from ssd1306 import SSD1306_SPI
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from time import sleep
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# Buttons and Knobs Pins
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BUTTON_PIN = Pin(34, Pin.IN)
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POT_PIN = ADC(Pin(35))
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# DHT Sensor
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DHT_PIN = DHT11(Pin(26))
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# SPI PINS
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MISO_PIN = Pin(19)
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MOSI_PIN = Pin(23)
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SCK_PIN = Pin(18)
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DC_PIN = Pin(4, Pin.OUT)
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CS_PIN = Pin(5, Pin.OUT)
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RST_PIN = Pin(2, Pin.OUT)
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# VSPI Hardware channel. 80 MHz signal rate
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vspi = SPI(2, baudrate=2600000, polarity=0, phase=0, bits=8, firstbit=0, sck=SCK_PIN, mosi=MOSI_PIN, miso=MISO_PIN)
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oled = SSD1306_SPI(128, 64, vspi, DC_PIN, RST_PIN, CS_PIN)
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class DisplayWriter:
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def __init__(self, spi):
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self.spi = spi
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self.height = spi.height
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self.width = spi.width
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def msg(self, msg: str, l_offset=0, top_offset=0) -> None:
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"""Writes a message to an OLED display.
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Will wrap text as needed.
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"""
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self.spi.fill(0)
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formatted_msg = self._split_msg(msg, l_offset, top_offset)
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for s, left, top in formatted_msg:
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self.spi.text(s, left, top)
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self.spi.show()
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# Todo make this a generator
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def _split_msg(self, msg, l_offset, top_offset) -> list:
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"""Splits a message at screen width to be used for text wrapping."""
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_top_offset = top_offset
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result = []
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for e in msg.split('\n'):
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result.append((e, l_offset, _top_offset))
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_top_offset += 10
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return result
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def dht_report(dht_pin):
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dht_pin.measure()
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_temp = dht_pin.temperature()
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_hum = dht_pin.humidity()
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return _temp, _hum
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def celsius_to_fahrenheit(celsius: int):
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return (celsius * (9 / 5)) + 32
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display = DisplayWriter(oled)
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while True:
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button_val = BUTTON_PIN.value()
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light_sensor = round(POT_PIN.read() / 4096 * 100)
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temp, hum = dht_report(DHT_PIN)
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report = "Temp: {}C/{}F\nHum: {}%\nButton: {}\nLight: {}%".format(temp, celsius_to_fahrenheit(temp), hum,
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button_val, light_sensor)
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# print(report)
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oled.invert(button_val)
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display.msg(report)
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sleep(0.1)
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