Модуль может быть в разном исполнении : либо USB, либо RS-232 c уровнями TTL .
Если Ваш RS-232 c уровнями TTL - Вам нужен еще преобразователь , обычно пользуют FTDI.
какие все-таки уровни у модуля.
Как раз для наладонников или РС. Подключаются Тх Rх и всё обменивается. Полный 232 требует 12в.
Смутил datasheet к жтому модулю, там написано: Electrical level: TTL level, Output voltage level: 0V ~ 2.85V RS-232 level
Тот GPS EM-441 c DealExtreme требует 0 - 2.85В TTL. Я для него паял преобразователь уровней. У людей этот чип держал до 5В.
Спасибо, теперь все понятно
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