unable to define expansion port heater 3 and thermistor 3

[vaibhav123]

; Configuration file for Duet WiFi (firmware version 1.20 or newer)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Mon Mar 12 2018 17:45:30 GMT+0800

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

;*** The homed height is deliberately set too high in the following - you will adjust it during calibration.
M665 R364.12 L785 B250 H620 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them

; Network
M550 PDeltaSystem500 ; Set machine name
M551 P ; Set password
M552 S1 ; Enable network
M552 P192.168.1.11 ; (0 = DHCP)
M554 P192.168.1.1 ; Gateway
M553 P255.255.255.0 ; Netmask
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

M555 P2 ; Set output to look like Marlin
G21 ; Work in millimetres
G90 ; Send absolute coordinates...

; Drives
M569 P0 S1 D2 ; Drive 0 goes forwards
M569 P1 S1 D2 ; Drive 1 goes forwards
M569 P2 S1 D2 ; Drive 2 goes forwardsM569 P3 S1 ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z80 E415 ; Set steps per mm
M566 X800 Y800 Z800 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 Z18000 E12000 ; Set maximum speeds (mm/min)
M201 X3500 Y3500 Z3500 E4000 ; Set accelerations (mm/s^2)
M906 X1500 Y1500 Z1500 E1000 I40 ; Set motor currents (mA) and motor idle factor in per cent
M84 S60 ; Set idle timeout

; Axis Limits
M208 Z0 S1 ; Set minimum Z

; Endstops
M574 X2 Y2 Z2 S1 ; Set active high endstops

; Z-Probe
M558 P1 I1 H30 B1 F500 T2500 ; Set Z probe type to switch and the dive height + speeds
G31 P800 X0 Y0 Z-0.10 ; Set Z probe trigger value, offset and trigger height
M557 R225 S50 ; Define mesh grid

; Heaters

;Heated chamber

M308 S3 P"e2temp" Y"pt1000" ; configure sensor 2 as thermistor on pin e1temp
M950 H3 C"exp.heater3" T3 ; create chamber heater output on e1heat and map it to sensor 2
M307 H3 B0 S1.00 ; disable bang-bang mode for the chamber heater and set PWM limit
M141 H3 ; map chamber to heater 2
M143 H3 S100 ; set temperature limit for heater 2 to 100C

;--------------------------------BED---------------------------
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B3950 R4700 F30
M143 H0 S150 ; Set temperature limit for heater 0 to 120C
M307 H0 F50 S0.8

;-----------------------------Tool 1 -----------------------------
M307 H1 A570 C140 D5.5 B0
M305 P1 T100000 B3950 R4700 H30 L0 ; Set thermistor + ADC parameters for heater 1
M143 H1 S270 ; Set temperature limit for heater 1 to 280C
;--------------------------tool 2--------------------------------------
M307 H2 A570 C140 D5.5 B0
M305 P2 T100000 B3950 R4700 H30 L0

M143 H2 S270
;--------------chamber heater---------------------------
;M141 H3 ;
;M301 H3 P49.7 I1.280 D483 ; use bang-bang control for the chamber heater
; --------------------------------------Fans---------------------------------------

M106 P0 S1 I0 F2000 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F2000 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F2000 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

;--------------------------------------------------------Tools--------------------------------
M563 P0 D0 H1
M563 P1 D0 H2 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Automatic saving after power loss is not enabled

; Custom settings are not configured

;resume
M911 S21.0 R23.0 P"M913 M104 S0 T0 M104 S0 T1 G91 M83 G1 Z3 F1000"

; Miscellaneous
T0 ; Select first tool
M42 P60 S255

M572 D0 S0.35

M501
;filament sensor
M591 D0 P3 C3 S1 R70:130 L24.8 E3.0

;M591 P3 C"e0stop" S1 D0 ; filament monitor connected to E0 endstop

i am using duet 2 ethernet board
this is my config.g file but the chamber heater is not showing up on the dashboard. i think its a syntax error. It would be great if someone could point out the error

[Phaedrux]

Your config seems to be a mix of RRF2 and RRF3 command syntax. For instance your endstop and probe config is for RRF2, but your heaters etc are RRF3.

What firmware are you actually running?

Please send M122 and M98 P"config.g" in the gcode console and report the results.