Despite what was said in the past in the thread linked by Bruce, WEC7 now DOES support TLS 1.2. You need to fully update your WEC7 tree, and then you'll have TLS 1.2 support out of the box.
See this blog post for more information on what you need to do to enable TLS 1.2: https://guruce.com/blogpost/tls-12-support-and-fix-for-rtos-bug-released-for-wec2013
That's valid for both WEC7 and WEC2013.
Good luck,
Michel Verhagen, eMVP
Check out my blog: https://guruce.com/blog
GuruCE
Microsoft Embedded Partner
NXP Proven Partner
https://guruce.com
Consultancy, training and development services.
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