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userhead Bart.Braun
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  • Topic: DFPlayer Mini Logic Levels
    You Reply:

    I emailed DFRobot tech support and they got back to me very quickly. It was very impressive. Thank you DFRobot! Here is what they said…

     

    The operating voltage of DFPlayer Mini and the TTL level of it are both 3.3V. So you do not need any resistor/ logic shifter to connect the module onto your 3.3V main board. 

    On the power supply side, we built a voltage regulator circuit, so you can input 3.3-5V voltage to use DFPlayer Mini. We recommend no more than 5.2V 

          

  • Topic: DFPlayer Mini Logic Levels
    You Reply:

    https://picaxe.com/docs/spe033.pdf

  • Topic: DFPlayer Mini Logic Levels
    You Reply:

    This diagram seems to indicate 3V3 logic levels, but does not explicitly say the logic level is 3V3.

    https://picaxe.com/docs/spe033.pdf