[quote user="cb1_mobile "]Are you "absolutely sure" of that? Willing to, "Bet the farm?"[/quote] This is very easy betting, for it's poster's farm we're talking about, not mine. I am giving my opinion, he is free to take it. [quote user="cb1_mobile "]might that "middle device" (which you claim to be "Guilty") have "succeeded" w/ poster's Arduino? [/quote] Absolutely not possible: when he uses Arduino, he certainly does not use the TI's Launchpad ICDI Serial to USB converter, but rather something else - possibly a MAX232 module, or maybe something which is already part of that Arduino board. Still, this is why I've asked (twice) that poster probes the UART transmission which is coming out of the target TM4C with a logic analyzer, DIRECTLY on the exposed pad of the launchpad, so that he sees what is REALLY coming out of the Tiva. Again, my line of reasoning: the ICDI is nothing more than a Tiva chip, which does other things besides receiving UART bytes and converting them to a "virtual USB port" to the PC, and it is to be expected that his short program in the target TM4C starts spitting bytes out much before the ICDI is ready. When the UART Rx of the ICDI finally wakes up, bytes are already flowing, and the receiver can detect a transmission half way through a byte. Bruno
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