keychron_qmk_firmware/keyboards/minimacro5/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

enum layers {
     _MAIN,
};

bool encoder_update_user(uint8_t index, bool clockwise) {
  if (index == 0) { /* First encoder*/
    if (clockwise) {
      tap_code(KC_1);
    } else {
      tap_code(KC_2);
    }
  } else if (index == 1) { /* Second encoder*/
    if (clockwise) {
      tap_code(KC_3);
    } else {
      tap_code(KC_4);
    }
  } else if (index == 2) { /* Third encoder*/
    if (clockwise) {
      tap_code(KC_5);
    } else {
      tap_code(KC_6);
    }
  } else if (index == 3) { /* Fourth encoder*/
    if (clockwise) {
      tap_code(KC_7);
    } else {
      tap_code(KC_8);
    }
  } else if (index == 4) { /* Fifth encoder*/
    if (clockwise) {
      tap_code(KC_9);
    } else {
      tap_code(KC_0);
    }
  }
    return true;
}

//
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { //buttion closest to usb is first
  [_MAIN] = LAYOUT_ortho_1x5(
     KC_A, KC_B, KC_C, KC_D, KC_E
  )
};