Hi all,

I had the idea to get rid of the cable from Duet to PanelDue (in my case to my own DuetMonitor with a Teensy and 5" RA8875 display), so I can place the Monitor where I want and even take it with me to another room (within reasons).
I didnt want it to connect to my router and have read about the ESPNOW protocol. Its working on 2,4G frequency but is a (multi-)point to (multi-)point data transmission protocol without connection to a network.
So I did some setup on a breadboard, and got a functioning prototype.
Then I ordered some PCBs, soldered the components on and got this:



Its working!! and no cable.

The PCB is 3cm x 4cm. I went with a 18650 LiPo battery holder with charger, so no cable at all other then charging.
Using and charging at the same time is possible with this battery holder.
But you can go with this:

mount it at the case and feed the voltage to the PCB. Power it with a wall wart or powerbank. A good powerbank should last several hours. The PanelDue gets the voltage through a short cable.
The PCB on the printer should be mounted where it can receive and send proper.

Because a panel of 4x4 PCBs was only a little more charge with p&p, now I have roughly 30 PCBs that I dont need.
This is a great community, so if you want you can get them for €0,75 each + €1,50 postage to Europe and US (up to 50g), €3,70 above 50g (from Germany).
The ESP8266 has to be programmed with Arduino IDE with ESP8266 Addon over serial. You can get the source code via email.

Technical Data:
You can choose between 8 IDs (Each pair has to have its own ID).
You can choose between 4 WLAN channels (1,4,7,11).
Set A or B for the ID. (There is no dedicated Master or Slave, each pair has one A and one B on the same ID and channel, and it doesnt matter which is on PanelDue and Duet side).
The serial port can be set to 19200, 38400, 57600 or 115200. Typically set to 57600 for Duet.
Its possible to use one PanelDue for different printers, but not at the same time: Change to another ID (and/or channel) on PanelDue side, press reset and you are connected to the other printer.

If you are unable to solder and program the PCB I can do this, but I dont have the components laying around, so I have to order them.
But it will then be €7 per PCB and I dont make a profit on it (I have no intention to make a profit).
So if someone is interested PM me.

And here is the schematic:
0_1554814774874_SerialBridge_SCH.PDF

With G31

If you are up for an interesting delta design, take a look at this kickstarter campaign:
Zatsit Delta
Its a mechanical kit only.

@deckingman said in Firmware 2.03beta2 available:

May I suggest that this input numbering vs label be included in the Wiki somewhere. Either in the section entitled "connecting end stop switches" or in the section dealing with M574. I don't think I trust myself to edit the Wiki personally but I'll have a go if you like.

I have put it in with M574.

I think it is not possible at the moment, but will be possible with the introduction of conditional execution of gcode in some of the next firmware releases.

I think the 2nd one will be more than adequate.

No, i dont have a PanelDue. I made a little monitor myself. You can see it here https://www.duet3d.com/forum/thread.php?id=222. Its based on a Teensy 3.2 and a 2.8" display with touch.

I adapted some code from the PanelDue source: json-parser (added code to receive no-json data lines), processing received values (only the structure) and sending commands with line-nr and checksum.
It sends M408 with checksum and gets a response. Commands to set temperature are received on the Duet and acted on.
Data in json-message and without json-format are displayed in a console-window.

Yesterday I programmed a window to type in commands on a virtual keyboard and send them. At that time I had a M575 P1 B57600 S1 in config.g and the commands were send with checksum. If I send M140 S50 the bed will heat and G28 will home my delta. So commands are recognised. But M119 will get no response.

For testing I set M575 P1 B57600 S0 in config.g and took out code to send line-nr and checksum.
Behavior stays the same.
I'm confused. Is the PanelDue sending some special characters? I searched in the source code but cound't find anything special.

Some testing:
I connected Duet via USB to my PC and opened a serial console for debugging.
I send with my little Duetmonitor M111 P3 S1 and debugging is on. The message is also received on the Duetmonitor.
Then I send M408 S0. The command is recognised and I have attached a screenshot from the logic analyser.
Direct afterwards I send M119, and attached another screenshot, where you can see, that there is no response. In USB debugging both command are recognised.

USB debugging:

Debugging enabled for modules: GCodes(3)
Debugging disabled for modules: Platform(0) Network(1) Webserver(2) Move(4) Heat(5) DDA(6) Roland(7) PrintMonitor(8) Storage(9)
aux: N14 M408 S0*89
aux: N15 M119*30
Class GCodes spinning.

Send M408 S0:

Send M119:

I attach my config.g so you can have a look if there is something interfering.

; Configuration file for Mini Kossel kit from Think3DPrint3D for Duet WiFi

; Communication and general
M111 S0                             	; Debug off
M550 PMiniKosselWiFi			; Machine name and Netbios name (can be anything you like)
M551 Preprap                        	; Machine password (used for FTP)
;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits
M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED 	; MAC Address
;*** Wifi Networking
M552 S1					; Enable WiFi

M555 P2                           	; Set output to look like Marlin
M575 P1 B57600 S0			; Comms parameters for PanelDue

G21                                 	; Work in millimetres
G90                                	; Send absolute coordinates...
M83                                 	; ...but relative extruder moves

; Axis and motor configuration
M569 P0 S1				; Drive 0 goes forwards
M569 P1 S1				; Drive 1 goes forwards
M569 P2 S1				; Drive 2 goes forwards
M569 P3 S0				; Drive 3 goes backwards (geared Extruder)
M569 P4 S1				; Drive 4 goes forwards
M574 X2 Y2 Z2 S1			; set endstop configuration (all endstops at high end, active high)
;M574 E1 S1

;*** The homed height is deliberately set too high in the following - you will adjust it during calibration
M665 R101.56 L215.0 B85 H227.31		; set delta radius, diagonal rod length, printable radius and homed height
M666 X0.05 Y0.14 Z-0.19			; put your endstop adjustments here, or let auto calibration find them
M350 X16 Y16 E16 I1    			; Set 16x microstepping with interpolation
M92 X80 Y80 Z80				; Set axis steps/mm
M906 X1000 Y1000 Z1000 E800 I60		; Set motor currents (mA) and increase idle current to 60%
M201 X1000 Y1000 Z1000 E1000		; Accelerations (mm/s^2)
M203 X20000 Y20000 Z20000 E7200		; Maximum speeds (mm/min)
M566 X800 Y800 Z800 E1200		; Maximum instant speed changes mm/minute

; Thermistors
M305 P0 T100000 B3950 R4700 H0 L0	; Put your own H and/or L values here to set the bed thermistor ADC correction /H36
M305 P1 T100000 B4388 R4700 H0 L0	; Put your own H and/or L values here to set the first nozzle thermistor ADC correction /H20
M305 P2 T100000 B4388 R4700 H0 L0	; Put your own H and/or L values here to set the second nozzle thermistor ADC correction
;M570 S180				; Hot end may be a little slow to heat up so allow it 180 seconds

; Fans
M106 I0 				; fans are not inverting
M106 S0 				; Turn off Fan 0
M106 P1 F100
M106 P1 H-1 				; disable thermostatic mode for fan 1
M106 P1 S0
M106 P2 I1 H-1 F87			; disable thermostatic mode for LEDs, set PWM frequency, output inverted
M106 P2 S0.15				; LEDs on at 15%

; Tool definitions
M563 P0 D0 H1                       	; Define tool 0
G10 P0 S0 R0                        	; Set tool 0 operating and standby temperatures
;*** If you have a single-nozzle build, comment the next 2 lines
;M563 P1 H2                      	; Define tool 1
;G10 P1 S0 R0                       	; Set tool 1 operating and standby temperatures

M92 E695                       		; Set extruder steps per mm (100 / gemessener Vorschub * aktuelle Steps)

; Z probe and compensation definition
;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command
M558 P5 X0 Y0 Z0			; Z probe is hall sensor and is not used for homing any axes
G31 X0 Y0 Z-0.15 P500			; Set the zprobe height and threshold (put your own values here)

;*** If you are using axis compensation, put the figures in the following command
M556 S78 X0 Y0 Z0                   	; Axis compensation here

M208 S1 Z0.0				; set minimum Z
M207 S3.5 F4500 Z0.1			; set hardware-retraction
M572 D0 S0.15				; set extruder advance

M307 H0 A87.3 C285.3 D8.3 B0		; set bed heater model
;
T0					; select first hot end

Hey, i was writing a ton of text and now had to delete it
Do as @dc42 suggested, should work.
The SS49E has an analog output and is in its raw form not suitable as endstop.

homedelta.g

; Homing file for RepRapFirmware on Mini Kossel
G91				; use relative positioning
M584 P4				; unhide 4th axis
;******* Change 320 in the following to a higher value if your Kossel has taller towers
G1 H1 X340 Y340 Z340 U340 F2000	; move all carriages up 320mm, stopping at the endstops
G1 H2 X-3 Y-3 Z-3 U-3		; move all carriages down 3mm
G1 H1 X6 Y6 Z6 U6 F150		; move carriages slowly up 6mm, stopping at the endstops
M584 P3				; hide 4th axis

G1 Z-5 F2000			; down a few mm so that we can centre the head
G90				; back to absolute positioning
G1 X0 Y0 F2000			; centre the head and set a reasonable feed rate

Relevant parts in config.g

; Axis and motor configuration
M569 P0 S1				; Drive 0 direction
M569 P1 S1				; Drive 1 direction
M569 P2 S1				; Drive 2 direction
M569 P3 S0				; Drive 3 direction (Extruder)
M569 P4 S0				; Drive 4 direction (4th axis)
M574 X2 Y2 Z2 S1			; set endstop configuration (all endstops at high end, active high)
M584 X0 Y1 Z2 U4 E3			; create axes
M574 U2 S0				; 4th axis endstop, high end, active low, connect to E0stop

M665 L215.000:215.000:215.000:130 R101.791 H221.788 B85.0 X0.131 Y0.014 Z0.000
M666 X-0.380 Y0.336 Z0.044 A0.00 B0.00
M669 X-22 Y0				; position of extruder pivot mount relative to machine center

M350 X16 Y16 Z16 U16 E16 I1		; Set 16x microstepping with interpolation
M92 X80 Y80 Z80	U400 E412		; Set axis steps/mm
M906 X1000 Y1000 Z1000 U1000 E750 I60	; Set motor currents (mA) and increase idle current to 60%
M201 X800 Y800 Z800 U400 E2000		; Accelerations (mm/s^2) E1000
M203 X20000 Y20000 Z20000 U3000 E7200	; Maximum speeds (mm/min)
M566 X800 Y800 Z800 U500 E2400		; Maximum instant speed changes mm/minute E1200

M208 S1 Z0.0				; set minimum Z
M208 U0:500				;  set travel of 4th axis

M584 P3					; hide 4th axis
T0					; select first hot end

I had to play with the value of rod length of 4th axis in M665 (its a bit more than the tubes length) and offset value in M669 (its less than actual) so that the bowden tube stays how I want it.

Hope it helps.

I recently installed the 4th axis for the extruder on my delta printer.
DuetWifi with Firmware 2.05.1
See it in action (2min30):

@WillGIam
Take a look here: link
Maybe you can use some of the code.

On a delta there is no fix resolution in XY plane. If one arm is nearly horizontally, the carriage has to move many steps to move the printhead a tiny bit, and is the arm nearly vertically then the printhead moves a 'huge' amount if the carriage move a little bit up or down.

check your config-override.g

From Allegro there are A1120 to A1123. But at the time I bought them, the only source was AliExpress and only A1120. Rare to get.

@Vlad as mentioned in your other thread, your 3.3V hall sensor is a linear output type. A buffer circuit will not help. You need a circuit with an comparator and a pot to form a didgital output.

Hey, i was writing a ton of text and now had to delete it
Do as @dc42 suggested, should work.
The SS49E has an analog output and is in its raw form not suitable as endstop.

@dc42 said in Duet 085 and Fans:

Thanks. Please try the new 1.24RC2 release, which should behave exactly the same 1.24RC1+1.

Tested and its the same.

I also used this line:
M106 P3 S1 I1 F500 H1 T45:100 L0.6 A4
and PWM is working as expected.
Mapping with A3 (Pin 21) and A2 (E1 heater) works also.
A big thank you.

@dc42
Installed:
Firmware Name: RepRapFirmware for Duet
Firmware Electronics: Duet 0.85
Firmware Version: 1.24RC1+1 (2019-05-11b1)
Web Interface Version: 1.22.6

Config.g (bench setup)
; Heaters
M307 H0 A463.6 C845.6 D3.3 S1.00 B0
M307 H1 A432.5 C186.7 D8.1 S1.00 B0
M305 P0 T100000 B4480 C0 R4700 H34 L0; Set thermistor + ADC parameters for heater 0 (4138)
M305 P1 X501
M307 H5 A-1 C-1 D-1 ; Disable Heater, available for M42 P4(4,3) S0.xx, M106 A4 (Pin22)
M307 H4 A-1 C-1 D-1 ; available for M106 A3 (Pin21)
M307 H3 A-1 C-1 D-1

M106 P0 S0 I0 F15000 H-1 ; Tool fan (Fan0)
M106 P1 S0 I0 F500 H-1 ; Bed fan (Fan1)
M106 P2 A5 I1 S0.15 H-1 ; LEDs (Pin23)
M106 P3 S1 I1 F500 H1 T45 A4 ; Thermostatic control is turned on (Pin22)

all working fine. Thank you.