Thank you very mcuh for the fast answer Felix!
You are right, got one relay working with GIPO19 and digitalWrite(19, HIGH)
But no succes with GPIO27, voltage does not change to 3.3V with digitalWrite(27, HIGH)... strange
There is only 2 free GPIO to use? because I have 2 relays to connect but also one line with DS18B20 sensors and another with a water flowmeter.