Bluetooth Arduino second try HC-05 [SOLVED]

Buying a HC-05 module solved the issue. https://www.devobox.com/el/bluetooth/738-hc-05-serial-bluetooth-module-for-arduino-gr.html?search_query=bluetooth+&results=33 HC-05 Serial Bluetooth module (for Arduino) Input voltage: 3.6-6V Working current: matching for 30 mA, matching the communication for 10 mA Output Power Class: Class 2 Size: 43mm x 15mm HC-05 is READ MORE