php - 'Trying to get property 'value_type1' of non-object' in laravel

I have the following query running in a function: $sensor = Sensor::where('id', $measurement->sensor_id)->with('sensorType', 'sensorType.valueType1', 'sensorType.valueType2')->first();

This returns the following response:

{
    "id": 1,
    "name": "DHT22 Kantoor",
    "sensor_type_id": 1,
    "active": 1,
    "organisation_id": 1,
    "disabled_until": null,
    "created_at": null,
    "updated_at": "2020-07-15T11:12:33.000000Z",
    "sensor_type": {
      "id": 1,
      "name": "DHT22",
      "value_1_type_id": 1,
      "value_2_type_id": 2,
      "created_at": null,
      "updated_at": null,
      "value_type1": {
        "id": 1,
        "name": "Temperatuur",
        "unit": "?�C",
        "created_at": null,
        "updated_at": null
      },
      "value_type2": {
        "id": 2,
        "name": "Luchtdruk",
        "unit": "Pa",
        "created_at": null,
        "updated_at": null
      }
    }

I am trying to get the 'Temperatuur' that is in this response in the following way:

$affValue = $sensor->sensor_type->value_type->name;

But this gives me the following error: Trying to get property 'value_type1' of non-object

I've tried doing the following: $sensor->name returns DHT22 Kantoor $sensor->sensor_type->id gives the same error as before

Am I trying to access this value wrong? Or is there a diffrent solution?

Solution:

I got it working now. Instead of using sensor_type i needed to use sensorType The same for value_type1, it needed to be valueType1 So instead of using the name that's in the response you need to use the name that is in the App\SensorType.