Connection Failed, Forced Interrupt - Nextion to UART Cable Connection or Upload Error Solution
Channel: AngDoo
Date: 2023-04-29

Error Message is "Connection Failed, Forced Interrupt", during the data upload after compiling between Nextion Display and UART with phone charger USB.
It is very simple. 

Fixed by the followings

GND of TTL to GND Nextion via GND of 2pin connector
TXD of TTL to RXD of Nextion
RXD of TTL to TXD of Nextion
Connect USB Pin of phone charger to 2pin Connector
GND(-) of 2pin connector to GND of Nextion
5V of 2pin connector to VC of Nextion

If you have still issue. Check the UART version and hardware compatibility as well.