在 openSUSE 從 source code 安裝，需要下列的套件：
sudo zypper in erlang erlang-observer
(erlang/otp version 需要 >= R17)
再來是下載 source code 並且編譯：
git clone https://github.com/emqtt/emq-relx.git
cd emq-relx && make
如果要執行的話：
cd _rel/emqttd && ./bin/emqttd console
再來使用 tcl.mqttc 驗證是否可以正確連線，這只是進行簡單的驗證。
Subscribe:
package require mqttc
mqttc client "tcp://localhost:1883" "USERSSub" 1 -cleansession 1
client subscribe "MQTT Examples" 1
while 1 {
if {[catch {set result [client receive]}]} {
puts "Receive error!!!"
break
}
if {[llength $result] > 0} {
puts "[lindex $result 0] - [lindex $result 1]"
if {![string compare -nocase [lindex $result 1] "Exit"]} {
break
}
}
}
client unsubscribe "MQTT Examples"
client close
Publish:
package require mqttc
mqttc client "tcp://localhost:1883" "USERSPub" 1 -timeout 1000
client publishMessage "MQTT Examples" "Hello MQTT!" 1 0
client publishMessage "MQTT Examples" "Exit" 1 0
client close
先執行 Subscribe 的部份，再使用 Publish 發送訊息，確定可以正確執行。
