将unsigned int拆分成两个unsigned char的程序怎么写
时间: 2024-05-24 08:10:35 浏览: 9
App Inventor is a visual programming environment that allows users to easily create mobile apps without requiring knowledge of traditional programming languages. MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol that facilitates communication between devices over a network.
In App Inventor, you can use the MQTT extension to create apps that can send and receive messages using the MQTT protocol. This extension allows you to connect to an MQTT broker, subscribe to topics, and publish messages to those topics.
To get started with using the MQTT extension in App Inventor, you will need to follow these steps:
1. Download and install the MQTT extension from the App Inventor Gallery or import it into your project using the "Import Extension" feature.
2. Connect your app to an MQTT broker by specifying the broker's IP address or hostname, port number, and credentials (if required).
3. Subscribe to one or more topics that you want to receive messages from.
4. Publish messages to the topics that you want to send messages to.
With the MQTT extension, you can create apps that can communicate with other devices over a network using the MQTT protocol. This can be useful for IoT (Internet of Things) applications, where devices need to exchange data with each other in real-time.