74 lines
2.1 KiB
Python
Executable File
74 lines
2.1 KiB
Python
Executable File
#!/usr/bin/env python
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import config
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from digitalio import DigitalInOut
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import time
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import datetime
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import busio
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try:
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import board
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except NotImplementedError:
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print("not running a recognized blinka board, exiting...")
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import sys
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sys.exit()
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########################################################################
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#
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# To test your thermocouple...
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#
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# Edit config.py and set the following in that file to match your
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# hardware setup: SPI_SCLK, SPI_MOSI, SPI_MISO, SPI_CS
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#
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# then run this script...
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#
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# ./test-thermocouple.py
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#
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# It will output a temperature in degrees every second. Touch your
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# thermocouple to heat it up and make sure the value changes. Accuracy
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# of my thermocouple is .25C.
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########################################################################
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spi = None
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if(hasattr(board,'SCLK') and
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hasattr(board,'MOSI') and
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hasattr(board,'MISO')):
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if(board.SCLK == config.spi_sclk and
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board.MOSI == config.spi_mosi and
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board.MISO == config.spi_miso):
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spi = board.SPI();
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print("Hardware SPI selected for reading thermocouple")
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if spi is None:
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spi = bitbangio.SPI(config.spi_sclk, config.spi_mosi, config.spi_miso)
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print("Software SPI selected for reading thermocouple")
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cs = DigitalInOut(config.spi_cs)
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sensor = None
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print("\nboard: %s" % (board.board_id))
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if(config.max31855):
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import adafruit_max31855
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print("thermocouple: adafruit max31855")
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sensor = adafruit_max31855.MAX31855(spi, cs)
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if(config.max31856):
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import adafruit_max31856
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print("thermocouple: adafruit max31856")
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sensor = adafruit_max31856.MAX31856(spi, cs)
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print("SPI configured as:\n")
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print(" config.spi_sclk = %s BCM pin" % (config.spi_sclk))
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print(" config.spi_mosi = %s BCM pin" % (config.spi_mosi))
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print(" config.spi_miso = %s BCM pin" % (config.spi_miso))
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print(" config.spi_cs = %s BCM pin\n" % (config.spi_cs))
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print("Degrees displayed in %s\n" % (config.temp_scale))
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while(True):
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time.sleep(1)
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temp = sensor.temperature
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scale = "C"
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if config.temp_scale == "f":
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temp = temp * (9/5) + 32
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scale ="F"
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print("%s %0.2f%s" %(datetime.datetime.now(),temp,scale))
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