I have a couple of questions about what hardware to pick up for my first project. The final implementation of what I'm planning will probably have the following features, and I just want to make sure that the stuff that I pick up initially will at least support what I'm wanting to do. What I'm wanting to do is read from a serial connection NMEA 0183 (from a depth finder + GPS)(Assuming I need to convert from RS232 to TTL) Buffer the data to an SD card Use bluetooth to connect to a phone/tablet when a connection is established with the Arduino.
So what I'm wondering is: 1) Most of the bluetooth shields/modules that I've been reading about seem to want to be connected to the RX/TX lines, but I'm thinking that those need to be connected to the NMEA line; do I need to get a Mega2560 in order to get the additional serial line(one for reading serial, one for BT comms)? 2) SD card stuff seems fairly straight forward from what I can tell; 3) Is there anything that I should be watchful for with respect to wanting to connect the Bluetooth to a phone/tablet (I'm thinking of connecting to a PlayBook because that's what I've currently got. (And I will hopefully be able to get bluetooth stuff working there)) Intent is that the BT connection should be compatible with Apple, Android, BlackBerry phones/tablets (but intents aren't necessarily reality)
Many thanks for any advice :)