PlatformIO Upload: Improve error handling/logging, fix typos.

ayushsharma82 / ElegantOTA

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PlatformIO Upload: Improve error handling/logging, fix typos. #195

Closed gongloo closed 4 months ago

gongloo commented 5 months ago

PlatformIO assumes successful upload if there's no return value. This PR returns error messages for several error conditions so that PlatformIO correctly reports upload failures as such, rather than as successful uploads.