pyMAX31855
This module is a Python3 based interface to a max31855 with k-type thermocouple.
It was tested on a raspberry pi 0 with adafruit breakout board.
The python module from adafruit was apparently broken.
Uses NIST correction for k-type thermocouple.
A simple usage example
Connect the max31855 to spi0.0 and run this example code.
from pprint import pprint as pp
import time
from max31855 import max31855
obj_ = max31855(bus=0,device=0)
try:
while True:
pp(obj_.read_value())
time.sleep(5)
except KeyboardInterrupt:
pass
This will print a value dictionary (manually commented)
{'fault': None,#<-- the fault status
'hexdata': '01781820',#<-- the sensors datagram
't_rj': 24.125,#<-- cold junction temperature
't_tc': 23.5,#<-- thermocouple temperature
't_tc_lin': 23.471984356580563,#<-- linearized thermocouple temperature
'u_rj': 0.9648033405278587,#<-- junction voltage
'u_tc': -0.0257975}#<-- thermocouple voltage