It is very easy to add Nextion LCD for Nano hotSPOT(BlueBox),components:
1) USB to TTL (Suggest CP2102 or CH340)
2) OTG with MicroUSB Cable power supply
HS RXD to Nextion TXHS TXD to Nextion RX
HS 5V to Nextion 5V
HS GND to Nextion GND
Find the component in AliExpress:
https://fr.aliexpress.com/item/CP2102-USB-2-0-to-UART-TTL-5PIN-Connector-Module-Serial-Converter-New-WAVGAT/32796844759.html
https://fr.aliexpress.com/item/Micro-USB-Host-OTG-Cable-HDD-mobile-hard-disk-with-additional-extra-power-charge-microUSB-cable/32811155296.html
https://www.bi7jta.org/cart/index.php?route=product/category&path=68
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