pointToViomiString(point) {
        const roundedX = Math.round((point.x + Number.EPSILON) * 100) / 100;
        const roundedY = Math.round((point.y + Number.EPSILON) * 100) / 100;
        return `${roundedX}_${roundedY}`;
    }
Rounds and formats a point for use in viomi params.

@param {object} point
@param {number} point.x
@param {number} point.y