1. First thing you need to do is identify your module. It can be either HC05 or HC06. Both the modules are same in functionality except the pinout. Also HC05 ... 2. PINS: The pins found on the breakout board are, KEY: This pin has to be pulled high to enter AT mode.VCC: Indicated range is 3.6 to 6 volt. To be on safer ... 3. Only for HC05: As stated earlier, some models of the breakout board do not have the key pin, instead they have an EN (enable) pin or WAKE UP pin which may ...
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