PJLink not accepting password to PT-EW650U Projector

[logancof]

We have tried changing every password on the projector to make it work. We used the default password (panasonic) and even created a service password. Our companion connects to the projectors ip, but when we hit a button, it says the password is incorrect.

instance(pjlink): Authentication error. Password not accepted by projector

[josephdadams]

I'm going to transfer this to the PJ Link module repository since it sounds restricted to functionality within that. Thanks!

[dali01]

We're experiencing the same issue with another Panasonic model. Is anyone looking at these issues?

[haakonnessjoen]

If someone else than me could look at the API spec and the code for password with fresh eyes, that would help a lot. I am blinded by my own code, as I cannot see reason it does not work.

[istnv]

I looked into this. I think the API spec has a typo. The digest example states that 498e4a67 JBMIAProjectorLink should generate 5d8409bc1c3fa39749434aa3a5c38682 but it doesn't. Remove the space between: 498e4a67JBMIAProjectorLink then it does result in 5d8409bc1c3fa39749434aa3a5c38682

[dali01]

@istnv is definitely on to something here. And the API spec says:

The password string “JBMIAProjectorLink” is added to the end of the random sequence “498e4a67” issued by .the Projector/Display

It doesn't say that it should be added with a space. So there is for sure a typo in the next sentence:

The digest of the resultant string “498e4a67 JBMIAProjectorLink” is carried out with the MD5 algorithm.

[haakonnessjoen]

Great research guys! I hate when specs are wrong on so important stuff. If anyone could test the latest 2.0 build now, that would be awesome! I still have a possible update if the projector is not responding for a second command within a second.

[dali01]

I will test it tonight.

[istnv]

I looked into this because I'm adding companion control to a few things in the theater, one being the projector that is upstairs from my primary position. I finally got the chance to wire it up and the new build works on a NP-PX750U with the password set.

[haakonnessjoen]

Closing this as this seems to have been the issue all along, and it should be working for everyone now.

[dali01]

@haakonnessjoen I've now tested it on my Panasonic PT-VZ580, and unfortunately the issue remains. Since companion doesn't output much debugging info, it's hard to see what happens. I've tested with a generic pjlink client, and that works fine with my projector. I did try to uninstall companion before installing the latest version, to make sure that I have the latest version of the pjlink plugin.

[istnv]

This page has PJLink specifications and testing utilities: https://pjlink.jbmia.or.jp/english/dl_class2.html

[dali01]

@haakonnessjoen When can Dan's fix be merged in to 2.0 beta?