EMQ 2.2.0 is available now! EMQ R2.2 supports CoAP(RFC 7252), MQTT-SN protocols completely, and it is extensible with Web Hook, Lua Hook and Elixir Hook.
Feature: Add 'listeners restart/stop' CLI command (emqttd#1135)
Bugfix: Exit Code from emqttd_ctl (emqttd#1133)
Bugfix: Fix spec errors found by dialyzer (emqttd#1136)
Bugfix: Catch exceptions thrown from rpc:call/4 (emq-dashboard#128)
Bugfix: Topic has been decoded by gen-coap, no conversion needed (emq-coap#43)