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What is the maximum theoretical limit for bluetooth transfer rate from a raspberry pi zero W to Raspberry pi 3 using RFCOMM?

They both have bluetooth 4.1, which, on wikipedia saids can reach speeds of 25Mbps (bits per second).

Ive only managed to reach 0.3 Mbps, which I measured by sending some bytes from the pi zero to a raspberry pi 3 using the python package PyBluez.

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    Can you describe your tests, such as the filesize and commands used for transfer?
    – earthmeLon
    Commented Sep 16, 2018 at 20:10
  • As implied in Miz's answer, bluetooth 4.1 does not work at speed anywhere close to 25 Mbps, nor does wikipedia claim that. I think if you look around you'll find it is more like 1 Mbps (or less), making your results expectable.
    – goldilocks ♦
    Commented Sep 19, 2018 at 14:26

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Bluetooth 4 does not have the same speed capacities as bluetooth 3 + HS. The high speeds were deprecated after bluetooth 3. As written on this article.

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