How to publish a message to a specific client in Mosquitto MQTT
Currently we have an app that controls multiple devices through MQTT. Each device subscribes to a unique topic which is named after their device ID. For example, device A has device ID 123 so it will subscribe to topic 123. Then if the app wants to publish control message to device A, then it will publish a topic named 123, which is the device ID of device A. By doing this, if we have 1000 devices then we will have 1000 topics. This is a really bad design. So we are thinking that maybe we can publish a topic to a specific client by setting the client ID that will receive the topic since each