# v0.7.1 — Scripts stop losing commands to a booting device

## ✨ New features

**`sendlnretry` — send a command, confirm it ran, resend if it didn't**
* New TTL command: `sendlnretry '<text>' '<confirm keyword>' [max attempts]`.
  It sends the text, then **waits for proof the device actually ran it**, and **resends** if that
  proof never arrives. Leave the attempt count out and it retries until it gets through.
* Drop it in wherever you send a command right after a boot — the fragile
  `pause` + `sendln` + `wait` dance becomes one line:

  ```
  wait 'root@(none):/#'
  sendlnretry 'tpm2' 'TPM 2p0'      ; retry until the device really runs it
  wait 'PASS'
  ```
* Cap the attempts and handle the failure yourself — on success `result` is **1**;
  when the attempts run out `result` is **0** and **the script carries on** instead of dying:

  ```
  sendlnretry 'tpm2' 'TPM 2p0' 3
  if result = 0 then
      dispstr 'tpm2 got no response after 3 tries'
  endif
  ```
* Pick the confirm keyword from the command's **own output** (`TPM 2p0`), not its echo (`tpm2`) —
  an echo is produced by the device's tty and doesn't prove the shell ever read the line.
* Each attempt waits **3 seconds** by default, or your `timeout` / `mtimeout` if you've set one.
  (Unlike `wait`, `0` doesn't mean "wait forever" here — that would mean never retrying.)

## 🐛 Bug fixes

**Scripts no longer hang forever when a booting device swallows a command**
* Fixed: a device that is still booting can **silently discard console input** the moment its shell
  takes over the tty. The line you sent is gone — the device never echoes it and never runs it —
  so the `wait` that follows blocks forever and the test rig sits dead until someone notices.
* This is a race, not a delay: adding `pause` before `sendln` only lowers the odds of hitting the
  window, it can never close it. In one overnight 45-cycle power-cycle run, **3 cycles hung this
  way** — and the swallowed sends landed at exactly the same moment as the 42 that worked.
* Use the new `sendlnretry` above to make these sends reliable.

## 📦 Downloads

Two builds are produced:

| Build | Needs .NET 8 Desktop Runtime? | Notes |
|-------|-------------------------------|-------|
| **Standard** (`ETTerms_v0.7.1`) | ✅ Yes | Smaller; for machines that already have the runtime |
| **Portable** (`ETTerms_v0.7.1_portable`) | ❌ No | Runtime bundled — unzip and run, no install / admin needed |

Run `ETTerms v0.7.1.exe`.

## 🔗 Links
* TTL reference (see **送出並確認 / sendlnretry**):
  [docs/ttl-script-reference.md](https://github.com/ETWen/ETTerms/blob/main/docs/ttl-script-reference.md)
* Architecture:
  [ARCHITECTURE.md](https://github.com/ETWen/ETTerms/blob/main/ARCHITECTURE.md)

**Full changelog:** [v0.7.0...v0.7.1](https://github.com/ETWen/ETTerms/compare/v0.7.0...v0.7.1)