LED lights

[cabinfourus]

Can someone tell me if the H520 has a main led like the H480 does under the drone?

Also, what are these two connectors for?

 

[h-elsner]

H520 has no status LED. The LED in the motor arms do the job.
The board looks like one from H Plus. My H520 boards all look different.
#1 is a spare port, I don't know for what. It has +Vbatt, GND and two signal pins, possibly Rx/Tx of a not used UART. Do never connect a GPS module to it. The GPS module will be burnt due to the two pins that have full battery voltage.
#2 could be the debug port of the STM32 but I'm not sure.

 

[cabinfourus]

#2 could be the debug port of the STM32 but I'm not sure.

This is what I was thinking. I might play around with one and see what happens.