Sonoff in the garage

I bought this device to control the garage door, with the aim of having more security.

The initial idea was to be able to know whether the gate is open or closed.

So far it has partially worked. I created a routine in Alexa to notify it that it is opening and closing.

However, I would like to know if the gate is open, as it has a sensor, I thought it would be possible to obtain the status of the sensor, but unfortunately I am not able to do this.

The idea would be to create a routine that after a while, Alexa notifies you that the gate is open.

Has anyone ever had this need or can help me with how to obtain the status of the sensor.