This is an example based on mbed-os cellular APIs that demonstrates a TCP or UDP echo transaction with a public echo server.

Revision:
51:f4b4b186f3a2
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+++ b/SERCOMM.lib	Wed Dec 25 16:18:24 2019 +0000
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+https://github.com/codezoo-ltd/SERCOMM.git/#f0de3044fc2014eaa2422d02cc299a7d83d36c51