Can't connect with my new sensor

Hello, i’am new en I got my first 2.5 sensor.

I have read the installation page and follow the steps but I can’t get the sensor running online.

I have also the problem that mij sensor id already is registered. I deleted my sensor so I can begin a new flashing program and register the sensor again but everything I do it will not work.

Is there somebody who can tel me step by step what tot do?

I have Arduino IDE.

The sensor send an own wifi signal and I can’t get it on my home wifi router.

Welcome!

Please read the official instructions attentively.
You can’t use Arduino IDE.