The GPIO pins are like P0.00, P0.01, P1.01, P1.02 and so on. I didnt know how to use this. I would like to know, how to use the GPIO pins in nRF52840 for simple LED and push button circuit? It would be really helpful.
The GPIO pins on the nRF52840 development kits are mapped as follows:-
In other words, P0.01 is SIO1, P1.01 is SIO33, P1.02 is SIO34 and so on. The macro mapping can be found in Nordic_SDK/modules/nrfx/hal/nrf_gpio.h (Line 71).