FF_MQTT_Sync

This is an Eclipse Paho C library based Sync MQTT client (subscriber and publisher) plugin for Unreal Engine 5.

THIRD PARTY LIBRARIES

1. Paho C Library: https://github.com/eclipse/paho.mqtt.c
2. OpenSSL 3 Binaries : You can build them by yourself or install pre-built binaries from here. We used v3.6.0. Don't use any other version !. or you have to build Paho C library with that version, again.
   https://slproweb.com/download/Win64OpenSSL-3_6_0.exe

INSTALLATION INSTRUCTIONS

1. If you go with pre-built openssl from the web site that we provide you, make sure that you set binaries location to /bin folder. Install wizard will ask you about this.
2. Open FF_MQTT_Sync.uplugin and remove FF_OpenSSL plugin. (We have centralized and closed source OpenSSL UE5 wrapper that satisfy all of our openssl dependent plugins. To run this plugin, you don't need that. So, just remove it to prevent issues.)
3. Copy libcrypto-3-x64.dll and libssl-3-x64.dll files from OpenSSL v3 installation's /bin folder to plugin's Source/paho_c_sync/Win64/bin folder.
4. Make sure that you don't have any other plugin that use different OpenSSL v3 than v3.6.0. If you have, you either have to build other libraries with OpenSSL 3.6.0; or Paho with your preferred OpenSSL v3 version. Unreal's own OpenSSL module that use OpenSSL 1.1.t is not important. You can use it in other plugins if you want. (unfortunately, UE5 already uses it.)

USAGE HINTS

• I assume that you already know how to connect an MQTT broker.
• You can see a sample blueprint in Content/BPs folder. Just change connection informations based on your broker.
• You need to put on of these protocols before URL mqtt://, mqtts://, ws://, wss://, ssl://
• You need to put port after the URL

DOCUMENTS

https://blueprintue.com/blueprint/tyjl3y62/

ASYNC

https://github.com/FF-Plugins-Active/FF_MQTT_Async

ROADMAP

• Android Platform support

LICENSE

Our custom license allow you to use this plugin in your commercial projects freely, but you can't sell this plugin as a plugin with or without any modification on any marketplace.