Andreas Merkle

> Excellent! I think that's one of our major mysteries down. Thank you. You are welcome! :-) Thank you for the long breath, sometimes I get github issues and I...

Enjoy the trip with your family. Didn't know that there are such strange german birds around. *LOL*

PlatformIO recommends using a library.json file (details: https://docs.platformio.org/en/stable/manifests/library-json/index.html#library-json ) which can be additional available in the repository. So you can keep the Arduino libaray.properties in parallel. The PlatformIO team confirmed...

Can you try with: AsyncTcpSock instead of AsyncTcp? https://github.com/yubox-node-org/AsyncTCPSock

104 means connection reset from peer (remote device), which is handled by the AsyncTcpSock. No worry about.

@nischneider Can we close this issue, because its now part of HW v2.1 ?

* https://github.com/Mbed-TLS/mbedtls/issues/1203 * https://github.com/espressif/arduino-esp32/issues/6286 * https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/mbedtls.html#performance-and-memory-tweaks * https://docs.espressif.com/projects/esp-idf/en/v4.4.6/esp32/api-reference/kconfig.html#config-mbedtls-ssl-max-content-len