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    Explore Pybytes | Official Documentation | Report a Firmware Bug/Issue | GitHub

    LoPy Bluetooth characteristic buffer size

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    bluetoothlopymobilebleble send data
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    • I Offline
      iber
      last edited by iber

      Seems like the buffer size for sending data over a characteristic is limited to 20 characters.

      chr.value("Didn't understand input {}".format(inputValue));

      On my mobile application the above line results in
      Didn't understand in

      I don't think the buffer limit is on the mobile side.

      Can anybody confirm?

      J 1 Reply Last reply Reply Quote 0
      • J Offline
        jmarcelino @iber
        last edited by

        @iber
        That's normal because it's not really a buffer, Bluetooth LE characteristics are usually restricted to 20 bytes by the protocol - it's what fits in the BLE packet - so unless you negotiate a larger MTU (larger packets than standard) between peers or use Long attributes you are restricted to that amount.

        Neither of those extended techniques are currently supported.

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