"The ON button does nothing" has three different causes — the modem-line pulse
was refused, the pulse went out and the amplifier ignored it, or the amplifier
woke and the UI missed it — and the log could not separate them: it recorded
one combined error and never said whether the amp came up.
RTS and DTR are now reported separately (not every USB-serial chip honours the
modem lines, and some refuse them without saying so), alongside the model and
transport. A watcher then logs whether the amplifier answered within 15
seconds, off the caller's goroutine so the click still returns at once.
No change to the wake sequence itself, which is the part that took a long time
to get right on the 1.3K-FA.
rouggy
6aff322be6