Upsert embedded object in mongoDB

Given this Person collection:

{
    "_id" : ObjectId("4f8e95a718bcv9c74da1e6511a"),
    "name" : "John",
    "hobbies" : [{
        "id" : 001,
        "name" : "reading",
        "location" : "home"
    },{
        "id" : 002,
        "name" : "sport",
        "location" : "outside"
    }]
}

and these new/edited Hobby objects:

{
    "name" : "walking",
    "location" : "outside"
}

and

{
    "id" : 001,
    "name" : "reading",
    "location" : "outside"
}

If I know the Person that I want to manage, what is be the best way to upsert embedded objects?

Currently my approach is to find the Person object, make the required modifications to it in my code, and then save it back to the DB. This works. But I'd like to simplify and reduce the number of round trips to the database.