Create DB (mysql/maria) with SensorData.sql
Save DB Settings in asset/config.php

Press button on back of co2ampel  2x (all LED are green)

Connect your smartphone with Wifi SSID :co2ampel  
go 192.168.4.1 in Browser

Set Wifi and URL in WiFimanger to sensor.php eg.(www.mywebsite.com/sensor.php) 

importent:
http only  (https not working)
for https you need fingerprint of your SSL Cert.