This is my working config , not complete but everything works
Configuration file for Duet 3 (firmware version 3)
; Configuration for Chiron+Titan Aero+Volcano+BlTouch+ SBC Pi4
; executed by the firmware on start-up
; General preferences
G21 ; works in mm
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Chiron" ; set printer name
; Drives
M569 P0.0 S1 ; physical drive 0.0 goes forwards X
M569 P0.1 S0 ; physical drive 0.1 goes backwards Y
M569 P0.2 S0 ; physical drive 0.2 goes bacwards ZL
M569 P0.3 S0 ; physical drive 0.3 goes backwards ZR
M569 P0.4 S1 D2 ; physical drive 0.4 goes forwards E
M584 X0 Y1 Z2:3 E4 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80 Y100 Z400 E400.96 ; set steps per mm
;M566 X1200 Y1200 Z12 E120 ; set maximum instantaneous speed changes (mm/min)
M566 X600 Y360 Z24 E1200 ; in mm/min-Marlin values
;M203 X9000 Y9000 Z180 E1200 ; set maximum speeds (mm/min)
M203 X6000 Y6000 Z1200 E4800 ; set maximum speeds-Marlin values transform to mm/m
;M201 X1000 Y800 Z250 E250 ; set accelerations (mm/s^2)
M201 X350 Y350 Z50 E30000 ; set accelerations-Marlin values
M906 X1100 Y1100 Z1100 E1100 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout
; Axis Limits
M208 X-6.0 Y-9.0 Z-20 S1 ; set axis minima
M208 X400 Y400 Z445 S0 ; set axis maxima-need to remeasure this
M671 X-40:440 Y200:200 ; leadscrews position at right and left of the X axis
; Endstops
M574 X1 S1 P"!io0.in" ; configure active-high endstop for low end on X via pin io0.in
M574 Y1 S1 P"!io1.in" ; configure active-high endstop for low end on Y via pin io1.in
;M574 Z1 S1 P"io2.in+io3.in" ; configure active-high endstop for low end on Z via pin-for original endstop's
M574 Z1 S2 ; endstop set to z-probe
;Stall Detection
;M915 P0 S-5 F0 H200 R0 ; P=drive motor , S= sensitivite , H=motorstep/sec ( check home file)
; Z-Probe
M950 S0 C"io5.out" ; create servo pin 0 for BLTouch
M558 P9 C"^io5.in" H5 F60 T6000 R0.2 A10 ; set Z probe type to bltouch and the dive height + speeds
G31 P25 X41.13 Y2.69 Z1.537 ; set Z probe trigger value, offset and trigger height
M557 X40:400 Y0:400 S72:80 ; define mesh grid
; Piezo Z-probe
;M558 P8 C"io5.in" I1 R0.4 F300 X0 Y0 Z1 ;new piezo
;G31 X0 Y0 Z-0.1 P100 ;new piezo
; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M307 H0 R0.286 C453.000:453.000 D1.10 S0.50 V24.0 B0 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 R1.840 C275.300:275.300 D4.10 S0.50 V24.0 B0 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S285 ; set temperature limit for heater 1 to 285C
; Fans
M950 F0 C"out4" Q25000 ; create fan 0 on pin out4 and set its frequency
M106 P0 S0 H1 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"out5" Q25000 ; create fan 1 on pin out5 and set its frequency
M106 P1 S0 H1 T45 ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"out7" Q25000 ; create fan 2 on pin out7 and set its frequency
M106 P2 S0 H-1 ; set fan 2 value. Thermostatic control is turned off
;M950 F3 C"out8" Q500 ; create fan 3 on pin out8 and set its frequency
;M106 P3 S0 H-1 ; set fan 3 value. Thermostatic control is turned off
; Tools
M563 P0 D0 H1 F0:2 ; define tool 0
G10 P0 X-6.0 Y-7.0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C
; Custom settings are not defined
M572 D0.4 S0.05
; Miscellaneous
;M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
;M564 H0 ; moving axes before/without homing
;M591 P1 C"io4.in" S1 D0 ; filament run out sensor - work in progress
M308 and M950 are not on the same order. Not sure how important is