If you are looking for an application to manage your (DIY) IoT projects using MQTT protocol, then stop searching, here it is :)

With this app, you can easily control any MQTT client devices with very simple configuration steps. Within a minute, you can talk with your best friend Arduino, or you can command your slave ESP8266 to do something...

Highlighted features:
- Many connections
- SSL connection
- Specify your data unit
- Display numeric values in a real-time updating chart
- Customizable publication components:
+ Text
+ Button
+ Switch
+ Seek bar
+ Combo box
+ Color picker
+ Multi buttons

=> HOME SCREEN WIDGETS
+ Button
+ Toggle button (widget version of the Switch component)
+ Color picker

Note:
- You can find the error log in: External storage (SD-card) / mqtt-dashboard / log
- Home screen Widgets are used to publish only! They do NOT subscribe to the topic and reflect their status.

Enjoy publishing!

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To create the BKS keystore, you can follow many articles on the internet ;)
- In case you are lazy, click here: https://www.google.com/search?q=keytool+convert+to+bks
- These articles will mention about the Bouncy Castle library. You should use "bcprov-jdk15on-146.jar".