user35070: I need a module for ARDUINO that can both detect Voltage (12V) and Control current between 2 pins (12V), like a relay on another device
I have found relay modules to control pins and another module for 4-channel Voltage detection, but it seems like a lot of components and wiring.
Is there any module that can do both?

user69592: You don't need another module to detect voltage on an Arduino.  The UNO, which I assume you are using, has 6 analog inputs (A0-A5) that can directly read voltage.  The only problem is that you want to measure a voltage up to 12V and the Arduino can only handle 5V.  So the solution is to DIVIDE that using two resistors in a voltage-divider configuration so that you only see 5V at the Arduino when there is 12V on the signal.
From here: https://www.electroniclinic.com/what-is-a-voltage-divider-or-potential-divider-formula-and-practical-uses/
you can see how to make one:

As far as controlling a "current" that is usually done with a relay.  There are no on-board relays but there are the digital outputs that can drive a small relay or can be connected via some other circuitry like a couple of transistors to drive just about any size relay.

35070: <p>I need a module for ARDUINO that can both detect Voltage (12V) <strong>and</strong> Control current between 2 pins (12V), like a relay on another device</p>
<p>I have found relay modules to control pins and another module for 4-channel Voltage detection, but it seems like a lot of components and wiring.</p>
<p>Is there any module that can do both?</p>
 69592: <p>You don't need another module to detect voltage on an Arduino.  The UNO, which I assume you are using, has 6 analog inputs (A0-A5) that can directly read voltage.  The only problem is that you want to measure a voltage up to 12V and the Arduino can only handle 5V.  So the solution is to DIVIDE that using two resistors in a voltage-divider configuration so that you only see 5V at the Arduino when there is 12V on the signal.</p>
<p>From here: <a href="https://www.electroniclinic.com/what-is-a-voltage-divider-or-potential-divider-formula-and-practical-uses/" rel="nofollow noreferrer">https://www.electroniclinic.com/what-is-a-voltage-divider-or-potential-divider-formula-and-practical-uses/</a></p>
<p>you can see how to make one:</p>
<p><a href="https://i.stack.imgur.com/84WFx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/84WFx.png" alt="enter image description here" /></a></p>
<p>As far as controlling a &quot;current&quot; that is usually done with a relay.  There are no on-board relays but there are the digital outputs that can drive a small relay or can be connected via some other circuitry like a couple of transistors to drive just about any size relay.</p>
