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MAX31865
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MAX31865

by isuprotein on Wed Aug 28, 2019 11:50 am

I have two MAX31865 boards that I can’t seem to communicate with on my Pi3B+. I have connected them as indicated in https://learn.adafruit.com/adafruit-max ... duino-code. When I run “i2cdetect -y 1” I get
Screen Shot 2019-08-26 at 9.57.45 AM.png
Screen Shot 2019-08-26 at 9.57.45 AM.png (146.96 KiB) Viewed 148 times


I have one of these with the everything soldered on and an RTD1000 connected.
IMG_20190826_100505.jpeg
IMG_20190826_100505.jpeg (98.48 KiB) Viewed 148 times


The other I just have pinned to a breadboard.
IMG_20190826_100434.jpeg
IMG_20190826_100434.jpeg (141.06 KiB) Viewed 148 times


I believe I have everything installed correctly but I cannot get the CIRCUITPY drive to show up. Any ideas?

isuprotein
 
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Re: MAX31865

by franklin97355 on Wed Aug 28, 2019 12:52 pm

You need the soldered connections for sure. Can you post a picture of the board connected to your Pi?

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Re: MAX31865

by isuprotein on Wed Aug 28, 2019 1:42 pm

I thought if there are no soldered connections across the jumper, it would be setup for 4-wire, is that not correct?

Pi picture below
DSC00126.jpg
DSC00126.jpg (282.49 KiB) Viewed 136 times

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Re: MAX31865

by franklin97355 on Wed Aug 28, 2019 1:55 pm

I'm talking about the connections on the header end. You need to solder a header or jumpers to the board. Check this out. https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier/arduino-code#assembly

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Re: MAX31865

by isuprotein on Wed Aug 28, 2019 2:11 pm

I tried it with both boards, the one that is soldered and the one in the picture with the Pi. The soldered one does not give any address with "i2cdetect -y 1" either.

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Re: MAX31865

by isuprotein on Sun Sep 08, 2019 7:41 am

I think the root problem of this is that I don't see a CIRCUITPY drive mounted when I connection the board. How do I troubleshot that issue?

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Re: MAX31865

by franklin97355 on Sun Sep 08, 2019 12:13 pm

Which Circuit Playground are you connecting to and can we see those connections?

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Re: MAX31865

by isuprotein on Fri Sep 13, 2019 8:02 am

I am only connecting the MAX31865 directly to the Pi. I have two MAX31865, one soldered for a three wire sensor and one with only the header pins soldered on. I have tried both of these on two different Pis and can't get either one to show a CIRCUITPY drive.

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Re: MAX31865

by franklin97355 on Fri Sep 13, 2019 4:34 pm

You won't get a CIRCUITPY drive on the Raspberry Pi as that is a drive from the Circuit Playground board which you are not using.

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Re: MAX31865

by isuprotein on Fri Sep 13, 2019 5:29 pm

That makes sense, I was following the CircuityPython instructions. However, I don't see anything when I run 'i2cdetect -y 1'. How would I troubleshoot that? In the instructions (Installing CircuitPython on Raspberry Pi), I am put to the point where i2c and SPI are enabled and then tested.

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Re: MAX31865

by franklin97355 on Sat Sep 14, 2019 1:34 am

When you run that code what do you get?

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Re: MAX31865

by isuprotein on Sat Sep 14, 2019 7:56 am

Screen Shot 2019-09-14 at 6.48.11 AM.png
Screen Shot 2019-09-14 at 6.48.11 AM.png (373.72 KiB) Viewed 27 times

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Please be positive and constructive with your questions and comments.