Set API key and sender ID values in this file which defined as macros.
Compile rebar project:
./rebar3 compile
Run Erlang console with our compiled beam files:
erl -pa _build/default/lib/*/ebin/
In Erlang console, run commands below. There will be messages displayed.
gcm_xmpp:start_link().
gcm_xmpp:send("hello", "device-token-here").