Pretty new to this! but Im trying to connect my Arduino to an Android app (That I would develop) through bluetooth and use a google maps API or something else to send turn by turn directions and light up arrows when a person needs to make a turn. I don't know if Google maps give access to real time turn by turn directions on their API. Not sure but you guys may be able to help. I just need a way for my Arduino to know that there is a turn coming and light up an arrow accordingly.