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Simple temperature reading

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This commit is contained in:
Michael Mandl 2016-01-11 12:41:10 +01:00
parent e2592b6454
commit cc5a97ffa4
1 changed files with 29 additions and 1 deletions
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30
i2c/ds1621.py
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@ -1,3 +1,31 @@
#!/usr/bin/env python #!/usr/bin/env python
print 'nothing yet' import smbus
bus = smbus.SMBus(1)
address = 0x49
print 'Start: ' + hex(bus.read_byte_data(address, 0xEE))
tempFull = bus.read_byte_data(address, 0xAA)
print 'Temp (1 deg): ' + str(tempFull)
halfDegreeTemp = bus.read_word_data(address, 0xAA)
tempHalf = halfDegreeTemp & 0x00FF
if halfDegreeTemp & 0xFF00:
tempHalf += 0.5
print 'Temp (0.5 deg): ' + str(tempHalf)
counter = bus.read_word_data(address, 0xA8)
print 'Counter: ' + str(counter)
slope = bus.read_word_data(address, 0xA9)
print 'Slope: ' + str(slope)
tempHi = tempFull - 0.25 + float(slope - counter) / slope
print 'Temp (hi-res): ' + str(tempHi)
print 'End: ' + hex(bus.read_byte_data(address, 0x22))