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Cherry Pick to 0.29.x: Disable DTR clearing on 1200-bps touch (only on Windows) (#2234)#2990
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The reason why it was originally introduced:arduino/Arduino@a6909bdWhy we are removing it now?* Windows does preserve the state of the RTS/DTR bits on successive opening of the serial port.* The serial library used in the Arduino IDE 1.8.x has a bug when trying to set DTR=false, on successive opening of the port the DTR line is set back high by the USB serial driver. This works differently from the serial library we use in the Arduino CLI, that sets DTR=false for good and this change is preserved on the successive opening of the port.* Having the serial port left in a state with DTR=false may cause problems to tools uploading later.It may probably completely removed, but for now, to reduce the testingsurface, it will be disabled only for Windows.
cmaglie approved these changesSep 1, 2025
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Ignored CI, it will never pass on such an old commit.
20dd7c9 intoarduino:0.29.x 16 of 107 checks passed
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topic: codeRelated to content of the project itself type: imperfectionPerceived defect in any part of project
3 participants
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Cherry pick this fix for the version 0.29.x. This version must be updated since it's used in the
arduino-cloud-cliOriginal PR
The reason why it was originally introduced:
arduino/Arduino@a6909bd
Why we are removing it now?
It may probably completely removed, but for now, to reduce the testing surface, it will be disabled only for Windows.
Please check if the PR fulfills these requirements
Seehow to contribute
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our contributing guidelines
UPGRADING.mdhas been updated with a migration guide (for breaking changes)configuration.schema.jsonupdated if new parameters are added.What kind of change does this PR introduce?
What is the current behavior?
What is the new behavior?
Does this PR introduce a breaking change, and istitled accordingly?
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