@JonB That especific array allows me to read info coming from an arduino connected to my raspberry in where I'm doing all of this so the arduino sents me the dintance from a second sensor it is Just a number for example 11 or 113 or 5 is similar to What I'm trying to do with the ESP8266 but via wifi. The arduino part is always woking no matter how much time I have the gui running so I kinda figured out my mistake must be in the way I get the value from the hmtl page wich brings me to the QNetworkAccessManager.

Need more information, such as Qt version, any messages you may see in the browser console.

@Dariusz
I still don't get how come you said the same URL worked to access the correct content from a web browser but not from QNetworkRequest, which was the important thing....