I love the idea of the GPS Logger 2.4 kit. However, along with logging, I would like to be able to have more outputs on this thing, so, for example, I can connect it to a computer to see myself on a map, or a digital camera to record position information on the EXIF data. I figured if I have extra outputs it can go about its business of logging away into the SD card---in other words, during a road trip, I want this thing on 100% of the time so I have a record of where I went, but if I get lost and need to see a map or want to take a picture to document something, I don't want to buy a second GPS unit.
So there are two ways I thought of doing this. One is to buy the programmer, and change the firmware so that as the messages are logged they are also relayed to some unused serial port(s) on the microcontroller. So the question is:
1. Does this board expose any of the serial ports on the microcontroller, or does this solution require me to solder tiny wires to tiny pins?
The other option I thought of is to simply splice off the transmit lines of the GPS module itself, and run those to either another microcontroller or straight to a level converter (for TTL/RS232 depending on what I need that output for). So the question is:
2. If I just splice out from the transmit line, can I have several outputs in parallel as long as the impedances are high enough that the voltage doesn't drop too much on any single line?