Can't retrieve wirelink input value

[Mandera]

Describe the bug

Should this not be possible?

# spawn e2 on wire lamp for example
E = entity():isWeldedTo():wirelink()
E["On", number] = 1
print(E["On", number])  # always 0

Thank you.

How to reproduce the bug

• Spawn Wire Lamp
• Spawn E2 on it with the code above
• It always prints 0

[enrico002]

The "on" label is input, not output. So you can't query whether the light is on. Create a variable yourself to check whether you've turned it on.

[Mandera]

Thank you. That's a shame

But no, I'm afraid that doesn't help me, I wanted to dynamically chose an EGP screen that's not wired (by another E2), I'm sure there's another workaround though

Regardless it'd be really neat to be able to query inputs

p.s: It's cool to see how far E2 has come since I was last active 10 years ago, and I'm really glad to see that everything's backwards compatible, kudos

[thegrb93]

That's intended behavior. When you 'retrieve' from a wirelink, you're reading outputs not inputs.

[thegrb93]

You might be able to read what entity the input is attached to and read their output.

[Denneisk]

I don't see why it can't be a feature, though.

[enrico002]

An output on both the Light and the Lamp makes sense.

Let's say I have a warning light on a car dashboard to indicate whether the headlights are on or off.

If I have a circuit with the warning light and the headlight bulbs connected in parallel, when a headlight burns out, the dashboard bulb will still be on and will only indicate that I've turned on the headlights, but it can't tell me that one or both of them are not working.
By connecting all the lights in series (warning light and headlights), if any light burns out, I'll notice it immediately, since none of them will be on.

If I use a variable that tells me whether I've turned on the lights, we're in the first case (parallel).

If Light and Lamp had an output (e.g. "IsOn"), they could function as a series circuit, even without a final variable, because I immediately see the indicator light:

• in (click on the Button)
• out (Out) Button
• in (On) Lamp
• out (IsOn) Lamp
• in (On) Indicator light (Light)
• out (IsOn) Indicator light (to the variable, if applicable)

[Denneisk]

Wiremod is more about logic than simulation, but that's a decent idea. Not really something we can go back to change now, though.