3.2 JSON Parse error: Unrecognized token '<' Password bug

chrishamm

I'm sorry but I'm having trouble reproducing this issue. It's all working as expected on Windows (Firefox), Linux (Chromium), and OS X (Safari). Can you confirm that you are using RRF 3.2 and DuetWiFiServer 1.25?

xenon2008

@chrishamm
Yes i can Confirm:
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.2 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2021-01-05

Tested with Google Chrome in Windows 10 x64 & on a Android Phone.

fcwilt

Hi,

I'm running 3.2 on a Duet 3 Mini 5

I didn't have M551 so I added it and rebooted.

DWC came up, asked for PW, entered PW - no issues.

I removed M551 and rebooted.

DWC came up - no issues.

Using most recent Chrome.

Frederick

Phaedrux

@xenon2008 can you provide the actual config.g that provokes the error? Maybe there's a special character or something in there.

xenon2008

Sure, should i PM this?

Phaedrux

if you're concerned about sharing the password, sure. You can zip it up and email it to jason@duet3d.com

xenon2008

Hi, i am again!

Is it possible that its a PrusaSlicer issue?
I send the GCODE direct from PrusaSlicer to the Duet, and then i get this error if i click on "Jobs".

I also tried to give a simple Name like Test.gcode to Upload to the DWC, with no other caracters...

xenon2008

Hi i am again,

It really looks like the Error comes from PrusaSlicer....
I have now updated to the latest Version from PrusaSlicer (2.3.0) but it is the same.
If i upload the Gcode direct from the Slicer i get the Error on the Webinterface.
BUT if i see this right, i get this error only then when the Passwort for the DWC is active, without i get no error until yet.

So we have now to find out, if this is a PrusaSlicer or a DWC behavior.

Each time i upload a Gcode, also i have a dissconnect and a reconnect on the DWC, but without a Passwort dialog, even when the Password protection is enabled:

Hope this helps a little bit.

Kind Regards from Austria

EDIT:
maybe this also would be helpful:
https://forum.duet3d.com/topic/20992/prusaslicer-dwc-disconnect-on-upload-test/6

xenon2008

Hello together!

Is there any Update?
I made also a Thread on Github on the PrusaSlicer Page.
Link to the Thread:
https://github.com/prusa3d/PrusaSlicer/issues/5877

Kind Regards

xenon2008 created this issue in prusa3d/PrusaSlicer

open JSON Error when Uploading Gcode to Duet 2 Wifi #5877

dc42

I have just tested this. I find that if I upload from PrusaSlicer 2.3.0 and I have DWC open to the printer on the same PC, It reports "JSON.parse: unexpected character at line 1 column 1 of the JSON data", disconnects briefly, and reconnects immediately.

I will look into the reason for the disconnection.

dc42

This is fixed in DWC 3.2.1RC2.

xenon2008

@dc42 thank you!