Duet 2 Wifi MAX31865 bad response

[jphilly]

I've connected a generic MAX31865 board to the spi0 header on my duet wifi but it fails to initialise.

It's connected like this post

When I run

M308 S1 P"spi.cs1" Y"rtd-max31865" R430

it returns "Error: M308: Failed to initialise RTD: bad response from sensor"

I've tried cs1 and cs3 but neither will work. Is there a way to troubleshoot the connection?

[Phaedrux]

What firmware version?

[jphilly]

@phaedrux 3.3

[Phaedrux]

Do you have more specifics on the generic board?

[jphilly]

@phaedrux

It's one of the adafruit clones like this with a 430ohm ref resistor

[Dougal1957]

@jphilly said in Duet 2 Wifi MAX31865 bad response:

@phaedrux

It's one of the adafruit clones like this with a 430ohm ref resistor

How have you got it connect to the Duet?

[jphilly]

@dougal1957

@jphilly said in Duet 2 Wifi MAX31865 bad response:

I've connected a generic MAX31865 board to the spi0 header

It's connected like this post

My wires are about 4in long. 3v3 is connected, vin is not

[jphilly]

Well it seems like the plastic mount I had the board on was somehow shorting it out. Moved the board around/put it on 30mm of standoffs and it kept working as long as it wasn't touching the mount.

[dc42]

@jphilly I'm glad you solved it.