Fixed DFPlayer init issue

[Yukti007]

Links

• Closes Firmware, DFPlayer initializing Failed (DFPlayer not detected). #359

What & Why

• Fix DFPlayer false-negative on init: changed isACK=true to isACK=false
  in dfPlayer.begin() to prevent timing race where unsolicited SD card status
  packets cause begin() to miss the ACK and return false on working hardware.

Validation / How to Verify

1. Flash v0.4.5.0 on a board with DFPlayer + SD card installed.
2. Run test 4 — should report PASS and not DFPlayer not detected.
3. Run tests 5 and 6 — SD file count should be > 0 and speaker should play.

Artifacts (attach if relevant)

• Screenshots / PDFs / STLs
• Logs — attach Serial Monitor output showing DFPlayer detected and responding

Checklist

• Only related changes FactoryTest_wMenu.ino
• Folder structure respected, work directory Firmware/factoryTest/FactoryTest_wMenu/FactoryTest_wMenu.ino

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Re-enable ACK after the DFPlayer init workaround

Passing false here changes more than the startup check: in DFRobotDFPlayerMini, begin(..., false, ...) disables ACK mode on the dfPlayer object for all later commands. In this sketch that means outputDevice() in initDFPlayer() and the volume()/play()/stop() sequence in runTest_Speaker() no longer wait for the module's command ACKs and instead run with only the library's fixed 10 ms pacing. On slower DFPlayers or SD cards this can turn tests 5/6 into intermittent false FAILs even after init succeeds, so the workaround should not leave ACKs disabled for the rest of the session.

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