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Bluetooth Low Energy (BLE) communication is a fundamental requirement for many IoT applications. This guide outlines the technical workflow for establishing a BLE connection, discovering services, and managing bidirectional data transmission using uni-app and Vue 3. The logic described here is applicable to Android apps, iOS apps, and WeChat Mi ...

Introduction to MQTT and Connection Resilience MQTT (Message Queuing Telemetry Transport) is a lightweight, publish-subscribe network protocol ideal for IoT and mobile applications. A critical aspect of building robust MQTT clients is handling connection failures gracefully. Network instability can cause a client to disconnect, and a well-desig ...

Scalability and Topic Limits EMQX does not impose a hard limit on the number of topics. You can scale topics as needed with minimal impact on performance, provided the system has sufficient memory and CPU resources. Data Storage in Open Source vs. Enterprise The Open Source version of EMQX does not include built-in data persistence features. To ...

Integrating Qiniu Cloud services into ARM64 embedded devices necessitates cross-compiling the C SDK along with its dependencies. The following procedure outlines the build process for targets such as the RK1808 core within a Linux host environment. Dependency: libcurl Obtain the libcurl source archive and extract it into the working directory. ...

Ultra-Wideband (UWB) technology marks a pivotal advancement in semiconductor design, distinguishing itself from legacy wireless standards through superior spatial awareness and data transmission rates. Core Operational Mechanisms The technology operates by transmitting very low energy signals across a broad bandwidth. Positinoing accuracy relie ...

Comparing 4G and WiFi Modules 4G modules require a SIM card with active data plan to establish internet connectivity, similar to mobile devices. WiFi modules connect through existing router networks. Key differences: 4G modules provide mboility with cellular coverage WiFi requires fixed infrastructure Both require valid credentials (SIM data p ...

Framework Overview When working with NB-IoT, BLE, or other communication modules that utilize AT command interfaces, a flexible and maintainable AT command framework becomes essential. The framework described here combines a state machine architecture with structured command arrays to handle complex communication sequences efficient. Core Desig ...

What is EMQX? EMQX is an open-source, highly scalable distributed MQTT message broker designed for IoT and real-time communication applications. EMQX 5.0 clusters support up to 100 million concurrent MQTT connections, with single-server throughput reaching millions of messages per second and millisecond-level low latency. It supports multiple p ...

Introduction This guide walks you through building your own IoT platform using an ESP8266 module and the OneNet cloud service. You will learn how to upload sensor data from the ESP8266 to the platform and receive commands issued from the cloud. Refer to the following official documentation: OneNet API referance: https://open.iot.10086.cn/doc/v ...