[quote author=Andy R link=topic=240470.msg1727619#msg1727619 date=1400362624]
What range does TTL work? Is that just 2 wire Rx & Tx?[/quote]
You usually also have a ground wire with a tx/rx setup.
[quote author=Andy R link=topic=240470.msg1727619#msg1727619 date=1400362624]
What range does TTL work? Is that just 2 wire Rx & Tx?[/quote]
You usually also have a ground wire with a tx/rx setup.