Further if you use the following command , you will be able to see the available versions for mosquitto.
[email protected]:~# opkg list |grep mosquitto
libmosquitto - 1.4.7-1 - Library required for mosquitto's command line client tools, also for use by any third party software that wants to communicate with a mosquitto server. Should be useable for communicating with any MQTT v3.1/3.1.1 compatible server, such as IBM's RSMB, in addition to Mosquitto This package is built with SSL support
libmosquitto-nossl - 1.4.7-1 - Library required for mosquitto's command line client tools, also for use by any third party software that wants to communicate with a mosquitto server. Should be useable for communicating with any MQTT v3.1/3.1.1 compatible server, such as IBM's RSMB, in addition to Mosquitto This package is built without SSL support
libmosquitto-ssl - 1.4.15-3
lua-mosquitto - 0.1-1 - Lua bindings to libmosquitto
luci-app-mosquitto - trunk+svn+teltonika+u1-1
mosquitto - 1.4.7-1 - Mosquitto is an open source (BSD licensed) message broker that implements the MQTT protocol version 3.1 and 3.1.1. MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This package also includes some basic support for configuring via UCI This package is built with SSL support
mosquitto-client - 1.4.7-1 - Command line client tools for publishing messages to MQTT servers and subscribing to topics. This package is built with SSL support
mosquitto-client-nossl - 1.4.7-1 - Command line client tools for publishing messages to MQTT servers and subscribing to topics. This package is built without SSL support
mosquitto-nossl - 1.4.7-1 - Mosquitto is an open source (BSD licensed) message broker that implements the MQTT protocol version 3.1 and 3.1.1. MQTT provides a lightweight method of carrying out messaging using a publish/subscribe model. This package also includes some basic support for configuring via UCI This package is built WITHOUT SSL support.
mosquitto-ssl - 1.4.15-3
Thanks