Error: M956: Accelerometer not found

[cosmowave]

Hi all,
yesterday i've installed an accelerometer (LIS3DH) on my Duet2Ethernet running RRF3.4.1

When i try to collect datas with:

G1 X-50 G4 S2 M956 P0 S1000 A0 G4 P10 G1 X50 F15000

I get the message:

Error: M956: Accelerometer not found

The green LED on the accelerometer is on. And i have double checked my wiring.
Is there something more i can check or measure?

This is my config.g:
config.g

[dc42]

@cosmowave have you used M955 first to configure the accelerometer?

[cosmowave]

@dc42 Yes, in my config.g

M955 P0 C"spi.cs4+spi.cs3"							; create accelerometer

I'm not sure if my cable is to long. I will try with a shorter one...

[dc42]

@cosmowave try running that M955 command from the command line in case it reports an error.

[cosmowave]

@dc42 Yes, it reports:

M955 P0 C"spi.cs4+spi.cs3"
Error: M955: Accelerometer not found on specified port

[cosmowave]

with a very short cable it works.
I try to install the resistor like mentioned somewhere...

[cosmowave]

I've insalled a 560 Ohm resistor on the SDO Port. Now it works.