When we first saw [Jeffrey Nelson]’s G1 based robot we immediately wondered what the transfer for the controls was. The G1‘s hardware supports USB On-The-Go, but it’s not implemented in Android yet. It turns out he’s actually sending commands by using DTMF tones through the headphone adapter. The audio jack is linked to a DTMF decoder that sends signals to the bot’s Arduino. He composed client/server code in Java to issue commands to the robot. You can find that code plus a easy schematic on his site. A video of the bot is embedded below.
[via Engadget]
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