You can communicate your Nextion LCD with your Arduino UNO by Software serial ... a liitle tricky but not much :)
by Tamer Savaşcı
You can upload your design to your Nextion LCD with USB UART. No need to use an SD card. Fast and easy.
Wireless room thermostat with LCD screen. Two Arduinos, Pro Mini is master, Uno is slave. Now with Bluetooth accessible.
Project tutorial by Tamer Savaşcı
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