<p>Nice! I am using this device since some in my kids record player. Although its running on Arduino at the moment, the kids still love it :-)</p>
<p>When I got my devices, I of course started also to write a RIOT driver on my own: <a href="https://github.com/haukepetersen/RIOT/tree/add_driver_dfplayermini">https://github.com/haukepetersen/RIOT/tree/add_driver_dfplayermini</a>. But as always, I did not get to PRing it, mainly as I was missing the time to add all the missing doc.</p>
<p>On first sight, it seems like both drivers offer a very similar interface. The main difference I could find is code size, the driver in this PR takes ~1300 byte ROM, while mine takes ~700 (both @ nrf52dk). The question is, if this is due to some additional features or maybe there is room for improvement.</p>
<p>But anyhow, I would be totally fine with merging this PR as is, and I might PR mine as a leight-weight alternative at some point.</p>

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