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docs/pt2-protocol-summary.md
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@@ -432,6 +432,42 @@ Current caution:
LCD behavior
- That suggests `20 D0` may be a more session-like or status-like host payload
pair than `00 80`, even though it still does not by itself wake the panel.
- A later targeted follow-up refined that further:
- `cmd=0x01 @ 20 D0` repeatedly opened `07 80 40 24 DD 64`
- `cmd=0x01 @ 00 80` repeatedly opened `07 80 40 20 D8 65`
- `cmd=0x03 @ 20 D0` also opened a second distinct family:
`07 80 20 12 97 78`
- in both repeated-`cmd=0x01` tests, the panel reportedly stayed out of
`CONNECT NOT ACT` until the script ended
- So the clearest difference between `20 D0` and `00 80` is currently the
**family selected** by repeated `cmd=0x01`, while the timeout-holding effect
may be a broader property of sustained repeated `cmd=0x01` traffic.
- A broader HE35 follow-up then showed that the early `0x00-0x03` command
region under `20 D0` is itself structured:
- `0x00` -> `07 80 40 48 3A EF`
- `0x01` -> `07 80 40 24 DD 64`
- `0x02` -> `07 80 20 12 87 68`
- `0x03` -> `07 80 20 12 97 78`
- All of those still looked one-shot on the serial side, but the user reported
the LCD stayed in the same clear/non-`CONNECT NOT ACT` state while the repeat
scripts were active.
- That makes the low `0x00-0x03 @ 20 D0` area look less like a single magic
wake frame and more like a small session-presence/status surface.
- A broader HE36 pass strengthened that further:
- the active pattern extends at least through `0x1D @ 20 D0`
- and it is mostly the odd commands that answer
- examples:
- `0x05` -> `07 80 41 24 DD 65`
- `0x09` -> `07 80 42 24 DD 66`
- `0x0D` -> `07 80 43 24 DD 67`
- `0x11` -> `07 80 44 24 DD 60`
- `0x15` -> `07 80 45 24 DD 61`
- `0x19` -> `07 80 46 24 DD 62`
- `0x1D` -> `07 80 47 24 DD 63`
- interleaved siblings also appear in `0x10 0x09 D7 ..` and
`0x20 0x12 .. ..` families
- So `20 D0` now looks like a broader low-command maintained surface, not just
a four-command curiosity.
## What We Do Not Know