### Uml diagram:

``` mermaid
classDiagram

namespace Esp {
    class Websockets{
        +webSocket
        +_WiFiMulti
        hexdump()
        websocketSetup()
        loop()
        webSocketEvent()
        sendMyText()
    }

    class NodeReadings{

    +TVOC_base, eCO2_base
    +counter
    +eCO2
    +TVOC
    +interval
    +temperature
    +humidity
    +currentMillis
    +lastMillis
    +errorSGP30
    +errorDHT11
    +noise        

    setup()
    loop()
    resetValues()
    update()
    checkForError()
    displayData()

    }


}
```
