Step 4: Connect iPhone Cable to Logic Level Board
The next step is to wire the cable into the LOW level side of the Logic level board. Again, you need only solder the Live, RX and GND but you may do the TX as well. The iPhone should be receiving from the TX-O pin on the board whereas the ID-12 is sending to the TX-I on the board. It can be useful to practice this on a breadboard first to make sure you get it right.
Once this is all soldered together, you can place it all in a box and begin testing. I used a custom built FTDI USB TTL adaptor and read the the values being sent with my laptop.
Once this is all soldered together, you can place it all in a box and begin testing. I used a custom built FTDI USB TTL adaptor and read the the values being sent with my laptop.
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