FAQ Hardware Connection

Included with your Nextion screen you find the connection cable for the screen. It's a 4-wire cable with a Red (5-8v), Blue (TX), Yellow (RX) and Black (GND)lead.

WARNING: If you connect 5V to RX, TX or GND, your screen is total-loss

• Connect the TX (Yellow) lead to the RX on your device (Raspberry, USBtoTTL adapter or Modem board)
• Connect the RX (Blue) lead to the TX on your device
• Connect the GND (Black) lead to the GND of your device
• Connect the 5V (Red) lead to the 5V of your device (minimum voltage should be 5V for a proper working)

USB-to-TTL adapter

You can use a USB-to-TTL adapter (they are cheap: 1 to 2 US$) to connect the Nextion device to your Raspberry or Computer. Be sure its supporting USART / CH340(G) for a proper working.

WARNING

Your Nextion device needs 5V-8V. Less voltage could damage your device in the long run