Hi @UMD,
tlstcpclient v0.2.7 library work on firmware 0.6.3(default), but it could not work on the prerelease version firmware because of Photon memory limitation.
In my test on the prerelease firmware 0.7x, 0.8.0, always memory allocation error happen(could not allocate new memory) on TLS RSA certification negotiation with server, even if using any cipher suites. And error message will be “Server Certificates is in-valid.”.
I will update the TLSTcpClient library for the new firmware but it need a time, so please use 0.6.3(default) firmware.
Thank you