Mapping out connector J2

On each TJC/Nextion basic panel is a set of 5 pads labeled J2. Nextion has always been cagey about these pads and tend to delete any posts mentioning them (it’s something of a theme with them). Here’s what they look like:

For reference, here’s the STM32

These pads are used to flash the STM32 processor via Serial Wire Debug

Tracing the paths, here’s what we can see:

1	2	3	4	5
GND	RESET	SWCLK	SWDIO	3.3V