Connecting two Pt100 sensors to single daughterboard

[HeidiH]

Hi,

I have read your provided instructions (Temperature connecting PT100) on how to connect Pt100 sensors using temperature board on Duet mainboard 6HC.

Is the possible number to stack daughter boards limited to two? Howabout, is the number of Pt100 sensors that can be connected to the daughter board only one or two? Also, should the temperature board work without having the 100Ohm resistor added to the second connector when measuring the temperature with another connector in use (not for test purposes)?

I am asking this because I would need to connect three Pt100 to my system, and got an impression that the resistor would not be needed and I could use both connectors of the daughter board for measuring temperature ?

BR, Heidi

[T3P3Tony]

@HeidiH You can connect a total of 4 PT100 sensors using SPI daughterboards to the 6HC. that's two sensors per board, two boards stacked.

Using the 100R resistor is just for testing.

[HeidiH]

@T3P3Tony Hi Tony, and thank you for your help. I got it now working well. I think I had an issue previously when I had configured my first sensor to have

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

instead of having it

M308 S1 P"spi.cs0" Y"rtd-max31865"

based on the naming on the daughter board. But now I got all my three sensors working with two daighter boards.

BR; Heidi