Connecting Nextion to a Control Device

Nextion is a 5V TTL Serial HMI device, be mindful
to ensure connecting to an appropriate adapter

The connection between Nextion and control device

Nextion Display -------- Control Device
   5V (Red) ------------------------- 5V
  GND (Black) ----------------------- GND
   TX (Blue) ------------------------ RX
   RX (Yellow)----------------------- TX

Ensure Ground with all used devices is common.
Control device: FOCA, USB-to-TTL, USB-to-UART, PC, MCU, Arduino
Ensure sufficient current supply as per Datasheets (here)