I have problem finding the right Port,Pin configuration for arduino-nano-33-ble-sense board.
I am using an open-source OS where I want to try a simple LED-ON example on specific pin. What I undestood from the following schemattic is somewhat confusing.
What does it mean GPIO25_A in the following schematic diagram(URL)? Does it mean PortA pin 25? But there is also P0.04 on that pin which would mean Port0 pin 4. I tried several pins from the schematic and it did not work as expected. I need more clerification. Also, I looked at nRF52840 datasheet for further reference.