At the moment I'm trying to get my Sony Ericsson working on the Arduino.
So what have I done:
I got a Serial cable for the phone. I plugged it into my PC and connected through the Terminal. At commands work great. The I cuted the cable to see the wires. Ok there were 6 wires. But 3 where useless.
I got now 3 cable to the serial port and it does still work. I found out that one is the RX cable. (To test that I sent the code to turn off the phone. First with this cable connected and the disconnected this cable. Both time it worked but once I didn't get the OK message from the phone so it should be the RX cable
Should be right or did I miss something?)
Now how do I detected the Ground cable and the TX? ok 3 cables so 50:50
But one of the important question:
When I like to connect the phone with those 3 wires to the Arduino do I have to use a Serial to TTL converter? I think so because as I tried to connected my Garmin GPS I had to use this as well
or am I wrong