2d grounded check problem?

[Qhex]

Hi, I’m doing a 2D game and to try and stop the play from spamming jump. I did a grounded check, only problem now is that the player can only jump once. The collision between player and ground is not being deducted.
here’s my code:

public class movment : MonoBehaviour 
{
public float speed = 3.0f;
public float jumpSpeed = 20.0f;
public bool grounded = true;
	
	void Update () 
	{ 
		Vector3 x = Input.GetAxis ("Horizontal") * transform.right * Time.deltaTime * speed;
		transform.Translate (x);

		if(Input.GetButtonDown("Jump"))
		{
			Jump();
		}
	}

	void Jump()
	{
		if (grounded == true) 
		{
			rigidbody2D.AddForce (Vector3.up * jumpSpeed);
			grounded = false;
		}
	}

	void onCollisionEnter2D(Collision hit)
	{
		grounded = true;
		Debug.Log ("I'm standing on the ground.");
	}
}

Thanks in advance.

[Hamdullahshah]

Correct implementation is

 void OnCollisionEnter2D(Collision2D coll) {

}

[Qhex]

nevermind … found my mistake… when I did the changed noted above I forgot to change hit to coll so it didn’t work, but now everything works just fine.
thanks you for assistance.

[Flint_Silver]

It’s not a good idea to make possible jump everytime you get a collision.
(remove “grounded = false” at line 23 i think that it’s the problem you could jump only one time)
So, if you add a second collider trigger on your surface and add at this gameObject with this trigger area the example code below:

 void OnTriggerStay2D(Collision2D trigger)
    {
        if (trigger.tag == "player" )
        {
        trigger.gameObject.GetComponent<NameOfTheScriptAttachedToThePlayer>().jump = true;
        }
    }

or you can do it from the script of the player.

void OnTriggerStay2D(Collision2D trigger)
{
      if (trigger.tag == "ground")
      {
          jump = true
      }
}

Or a second possible way it’s to add a groundCheck (see this video)

Or another possible solution is to use OnCollisionEnter2D similar to OnTriggerStay2D Function I wrote before.