63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
#!/usr/bin/python3
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import board
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import time
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import busio
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import adafruit_ads1x15.ads1015 as ADS
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from adafruit_ads1x15.analog_in import AnalogIn
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from time import sleep, strftime
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from rpi_lcd import LCD
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try:
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lcd = LCD(bus=2)
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except OSError:
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lcd = None
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# Create the I2C bus
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i2c = busio.I2C(board.SCL, board.SDA)
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# Create the ADC object using the I2C bus
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ads = ADS.ADS1015(i2c)
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# Create single-ended input on channel 0
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# tmp36 = AnalogIn(ads, ADS.P0)
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# Attempting to create a single-ended input on channel 1
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depthS = AnalogIn(ads, ADS.P1)
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# Subtract the offset from the sensor voltage
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# and convert chan.voltage * (1 degree C / 0.01V) = Degrees Celcius
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# temperatureC = (tmp36.voltage - 0.5) / 0.01
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# Open the file to write down the results
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timestr = time.strftime("%Y-%m-%dT%H-%M-%S")
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filename = "/home/shared/hydrophonitor/data/depth/" + timestr + "_depth_data.csv"
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#depthM = ((depthS.voltage * 31.848) - 22.93)
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#Attempting to round the figure to a more intelligible figure
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#rounddepth = round(depthM, ndigits)
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#psi = depthS.voltage * 104.1666667 - 75
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#bar = psi * 14.503773800722
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with open(filename, "w", 1) as f:
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f.write("time and date, Voltage of depth sensor (V), Depth (m)\n")
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while True:
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voltage = depthS.voltage
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depthM = ((voltage * 31.848) - 22.93)
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rounddepth = round(depthM, 2)
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# roundtemp = round(temperatureC, 2)
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roundvolts = round(voltage, 3)
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print((str(voltage) + " V ") + (str(depthM) + " m ") + (str(roundvolts) + " V ") + (str(rounddepth) + " m"))
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if lcd:
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lcd.clear()
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lcd.text((str(roundvolts) + " V ") + (str(rounddepth) + " m"), 1)
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f.write(time.strftime("%Y-%m-%dT%H:%M:%S") + ",")
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f.write(str(roundvolts) + "," + str(rounddepth) + "\n")
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time.sleep(3)
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