JS1-H PWM - Mismatch between compiled LHX and current OEM firmware

[samuelhj]

Hello.

I recently got a JS1-H PWM joystick. It did not come straight from Danfoss since my client was very tight on time and we had to resort to finding a joystick from OEM instead of Danfoss. I had already prepared the Plus1+ Guide program for it and compiled it, I used the built in template as a starting point.
It was written in 2025.3 version and when I tried uploading the .LHX file this morning I got an error of mismatch. first image named Service_tool

So I updated everything to version 2026.1, updated the HWD in the project and when uploading the compiled code from that I get the same issue. (See picture called guide)

Tried creating a new project and using the template file and same results. Does anyone have an idea why I'm getting "(undefined)" on the new LHS despite it being created from a template for the JS1-H PWM?

Is it because of bootloader version mismatch, but why the "(undefined)" ? (see picture Comparison)

[Lukey]

It's likely undefined as you have not defined it in your new program right ?

[samuelhj]

Thanks for that. Apparently my inspector was hiding and once I enabled it a lightbulb came on in my head. Guess I got stuck in some tunnel vision.