Max31865
Joeldar
Posts: 17
Has anyone used the MAX31865 rtd interface with the propeller/spin? I found the 31855 spin object, but it is significantly different.
Joel
Joel
Comments
Welcome to the Propeller Forum (your first post. Yay!).
Personally, I have not seen a piece of Propeller code specific to the MAX31865, but that doesn't mean someone else may chime-in with more.
"RTD" (Resistance-Temperature-Detector) and "Thermocouple" sensor technologies are different. It is basically all about the difference in sensor-materials & physics.
Just do a simple Web search; e.g., "RTD vs Thermocouple".
That said, and since you provided no information about what your application is, there is probably code in the Propeller Object for the Maxim Thermocouple part you found that can be re-used for the Maxim RTD part.
Good Luck, David
P.S., The MAX31855 is a current replacement/upgrade for the earlier MAX6675 part. Also I seem to remember from roughly a year ago, there were some versions of the MAX31855 that had some manufacturing calibration defects. But without more research, I can not say more. Do your own research to understand.
I found Beau Schwabe's SPI Demo Object which seemed to be a good starting point. I haven't gotten to the point of decoding any of the data into meaningful temperatures, but I feel like I have successfully written to the device, configured it and read back the RTD register. I did read about the defects in previous versions. I bought a couple of the Playing with Fusion breakout boards which hopefully don't have that issue.
My target application is a controller for a homebrewing setup. I've attached the Spin code I have so far. I haven't worked with the Propeller or Spin for a few years so it's a re-learning process.
Joel