Thanks for the replys,
I just wasn't sure how you would go getting the sensor to send all the saved data. As with all the examples i have tried, it grabs data from a sensor and then sends it straight away. Is there anything on here i could look at that would show getting data from a file and then sending it. As what i have read the controller could ask for something from the sensor if not there. wait x amount of time then ask again until it gets a reply. then sensor would then offload any stored data.

Wanting to know if it is possible to have gps data saved to sd-card while unit is away from home, Then when unit comes back within range of controller this data then transferred over mysensors network to controller?