Personal MacOS keyboard firmware override, Karabiner-elements config to set Caps+IJKL to arrows

karabiner.json

{
    "global": {
        "check_for_updates_on_startup": true,
        "show_in_menu_bar": true,
        "show_profile_name_in_menu_bar": false
    },
    "profiles": [
        {
            "complex_modifications": {
                "jaydens_disabled_rules_to_be_experimented_with_later": [
                    {
                        "description": "Jayden's testing6",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "caps_lock",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "caps_lock"
                                    },
                                    {
                                        "set_variable": {
                                            "name": "asdf",
                                            "value": 0
                                        }
                                    }
                                ],
                                "to_after_key_up": [
                                    {
                                        "set_variable": {
                                            "name": "asdf",
                                            "value": 1
                                        }
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    }
                ],
                "parameters": {
                    "basic.simultaneous_threshold_milliseconds": 50,
                    "basic.to_delayed_action_delay_milliseconds": 500,
                    "basic.to_if_alone_timeout_milliseconds": 1000,
                    "basic.to_if_held_down_threshold_milliseconds": 500,
                    "mouse_motion_to_scroll.speed": 100
                },
                "rules": [
                    {
                        "description": "Caps Lock to Fn",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "caps_lock",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "fn"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Caps Lock to Fn",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "caps_lock",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "fn"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + I/J/K/L to Arrow Keys",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "i",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "up_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "j",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "k",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "down_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "l",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_arrow"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + W/A/S/D to Arrow Keys",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "w",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "up_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "a",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "s",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "down_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "d",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_arrow"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + U to Delete",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "u",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "delete_or_backspace"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + Q to Delete",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "q",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "delete_or_backspace"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + E to Enter",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "e",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "return_or_enter"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + O to Enter",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "o",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "return_or_enter"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + p to Page Up",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "p",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_up"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + ; to Page Down",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "semicolon",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_down"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + r to Page Up",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "r",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_up"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Fn + f to Page Down",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "f",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_down"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    }
                ]
            },
            "devices": [],
            "fn_function_keys": [
                {
                    "from": {
                        "key_code": "f1"
                    },
                    "to": [
                        {
                            "consumer_key_code": "display_brightness_decrement"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f2"
                    },
                    "to": [
                        {
                            "consumer_key_code": "display_brightness_increment"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f3"
                    },
                    "to": [
                        {
                            "key_code": "mission_control"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f4"
                    },
                    "to": [
                        {
                            "key_code": "launchpad"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f5"
                    },
                    "to": [
                        {
                            "key_code": "illumination_decrement"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f6"
                    },
                    "to": [
                        {
                            "key_code": "illumination_increment"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f7"
                    },
                    "to": [
                        {
                            "consumer_key_code": "rewind"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f8"
                    },
                    "to": [
                        {
                            "consumer_key_code": "play_or_pause"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f9"
                    },
                    "to": [
                        {
                            "consumer_key_code": "fast_forward"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f10"
                    },
                    "to": [
                        {
                            "consumer_key_code": "mute"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f11"
                    },
                    "to": [
                        {
                            "consumer_key_code": "volume_decrement"
                        }
                    ]
                },
                {
                    "from": {
                        "key_code": "f12"
                    },
                    "to": [
                        {
                            "consumer_key_code": "volume_increment"
                        }
                    ]
                }
            ],
            "name": "Default profile",
            "parameters": {
                "delay_milliseconds_before_open_device": 1000
            },
            "selected": true,
            "simple_modifications": [],
            "virtual_hid_keyboard": {
                "country_code": 0,
                "indicate_sticky_modifier_keys_state": true,
                "mouse_key_xy_scale": 100
            }
        }
    ]
}