For future reference,

I was checking the myconfig.h file and found some variable definition regarding the NRF24 radio.

There were two variables referencing the CE and CS pin.

/**
 * @def MY_RF24_CE_PIN
 * @brief Define this to change the chip enable pin from the default.
 */
#ifndef MY_RF24_CE_PIN
#define MY_RF24_CE_PIN (DEFAULT_RF24_CE_PIN)
#endif

/**
 * @def MY_RF24_CS_PIN
 * @brief Define this to change the chip select pin from the default.
 */
#ifndef MY_RF24_CS_PIN
#define MY_RF24_CS_PIN (DEFAULT_RF24_CS_PIN)
#endif

I have set these two variables in my sketch for my MRKZERO and got the radio working.

Problem Solved :+1: