qmk_firmware/keyboards/1upkeyboards/sweet16v2/keymaps/default/keymap.json

{
    "keyboard": "1upkeyboards/sweet16v2",
    "keymap": "default",
    "coonfig": {
        "features": {
            "encoder_map": true
        }
    },
    "layout": "LAYOUT_ortho_4x4",
    "layers": [
        [
            "KC_P7", "KC_P8", "KC_P8",   "KC_PMNS",
            "KC_P4", "KC_P5", "KC_P6",   "KC_PPLS",
            "KC_P1", "KC_P2", "KC_P3",   "KC_PSLS",
            "MO(1)", "KC_P0", "KC_PDOT", "KC_PENT"
        ],
        [
            "RM_TOGG", "RM_HUEU", "RM_SATU", "RM_VALU",
            "RM_NEXT", "RM_HUED", "RM_SATD", "RM_VALD",
            "RM_SPDD", "RM_SPDU", "_______", "_______",
            "_______", "_______", "_______", "QK_BOOT"
        ]
    ],
    "encoders": [
        [{"ccw": "KC_VOLD", "cw": "KC_VOLU"}, {"ccw": "RM_VALD", "cw": "RM_VALU"}],
        [{"ccw": "_______", "cw": "_______"}, {"ccw": "_______", "cw": "_______"}]
    ]
}