Make zoom work

[TheCrazyT]

The buttons on my microscope have no effect on the image input. Although they work when i use my smartphone.

Currently I'm clueless why this is happenning, or does the smartphone-app itself digitally zoom in?(i hope that is not how it is doing it)

[czietz]

From my website:

What about the "status service" port? Pressing a key (take a snapshot, zoom in, zoom out) on the microscope sends a "JHCMD" packet from the microscope to this port on the computer.

I'm pretty sure this is purely a digital zoom in the app. From the decompiled source code:

    @Subscriber(tag = "OnGetGP_Status")
    private void getkey(int nStatus) {
        byte key = (byte) nStatus;
        if (key == 1) {
            paiORlu(0);
        } else if (key == 5) {
            this.scal -= 0.2f;
            if (this.scal < 1.0f) {
                this.scal = 1.0f;
            }
            if (this.scal > 2.0f) {
                this.scal = 2.0f;
            }
            wifination.naSetScal(this.scal);
            showScale("X" + (((float) Math.round(this.scal * 100.0f)) / 100.0f));
        } else if (key == 4) {
            this.scal += 0.2f;
            if (this.scal < 1.0f) {
                this.scal = 1.0f;
            }
            if (this.scal > 2.0f) {
                this.scal = 2.0f;
            }
            wifination.naSetScal(this.scal);
            showScale("X" + (((float) Math.round(this.scal * 100.0f)) / 100.0f));
        }
    }

Thus, the reaction to key presses is to call back to naSetScale(): https://github.com/aivenlau/JH-Libary_N_FFMPEG/blob/f61ec630330918ba2ea16aaed8e0c88f54901d8f/JH-Libary/JH_WifiCamera.m#L9292, which merely sets the variable _nScale which is then used while processing the image. No command is transmitted back to the microscope.

[TheCrazyT]

Thanks. Now it feels like getting scammed. Atleast if digital zoom gets advertised as real zoom. (*cough* they advertised a 50x to 1000x zoom ... guess I didn't activate my braincells before buying). But I guess you can't expect anything like that for the price I paid.

Also means that they put additional resources (like buttons) just to make you believe that you can actually control zoom. But kinda explains the bad quality if you zoom in. I mean why the add those buttons if you could control "zoom level" inside the app directly? (because it would be too obvious inside the app?)

[czietz]

In my microscope the real/optical zoom is adjusted mechanically. (The mechanism feels rather cheap - but YGWYPF.) I have no idea why they included the digital zoom buttons on top.