• Sorry, I should have clarified: 23 bytes includes headers, which means 20 bytes for application payload, which is what Espruino should support. However, in my understanding, even if there is a MTU mismatch I don't think that explains why packets are missing or being received twice.

  • Ah, ok, that explains why I couldn't count 23 bytes on the screenshot :) My guess was the too large MTU somehow confused the Espruino.

    But one more "maybe": remove the console.log statements from the receiving, and print the first 4 packets after receiving is done. Sending that 20 byte DataView in that "nice" format takes several 7.5ms connection intervals. Maybe that interferes. But it's just a guess...


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