In this article, we will learn how to use OpenCV and YOLO object detector to capture/save and detect objects in images every five seconds. We will then convert the image into a byte array and publish it via MQTT, which will be received on another remote device and saved as JPG. We will use the … Read more
1 What is MQTT? MQTT (Message Queuing Telemetry Transport) is an instant messaging protocol developed by IBM, which could become an important part of the Internet of Things (IoT). MQTT is a messaging protocol based on a binary message publish/subscribe programming model, and has now become an OASIS standard. Due to its simplicity, it is … Read more
mqtt_cpp is a powerful C++ library for implementing client functionality of the MQTT (Message Queuing Telemetry Transport) protocol. It supports MQTT 3.1 and MQTT 5.0 protocols, designed with a focus on efficiency, scalability, and ease of use, making it suitable for developing Internet of Things (IoT) applications, embedded systems, or other systems requiring message-pushing capabilities. … Read more
The Era of IoT is Here, Connectivity is Everywhere! Have you ever thought that on this seemingly ordinary day, the Internet of Things (IoT) has quietly integrated into every aspect of life? In the morning, a smart wristband gently vibrates, waking you softly while it syncs last night’s sleep data to your mobile app, providing … Read more
Hello everyone! I am Lao Zhang. Today we will discuss a very important topic in IoT development – the data synchronization solution for edge nodes. In IoT systems, it is often necessary to handle a large amount of scattered sensor data. How to efficiently and reliably synchronize this data to the cloud is a very … Read more
How to develop a smart home status monitoring tool based on MQTT? It sounds very “high-tech”, right? But don’t worry, I will guide you step by step in the simplest language, so even if you are new to Python, you can easily follow along. If you are interested in smart lights, smart thermostats, or smart … Read more
The article on building the ESP Bootloader under Zephyr for ESP32-C3 mentions that Zephyr also supports booting from MCUBoot: ROM-> MCUboot -> Zephyr.bin ( App ) As previously explained about the ROM, this article focuses on analyzing the booting part of MCUboot. Building Using west -v build -b esp32c3_zgp –sysbuild zephyr_sample/ — -DBOARD_ROOT=/mnt/g/project/v3.4.0/zephyr_sample/ -Dmcuboot_BOARD_ROOT=/mnt/g/project/v3.4.0/zephyr_sample/ to … Read more
In Zephyr, there are two boot processes for the ESP32 series SOC: No MCUboot: ROM-> ESP Bootloader-> Zephyr.bin (App) With MCUboot: ROM-> MCUboot -> Zephyr.bin (App) This article focuses on the no MCUboot part. ROM In ESP32C3, the ROM is referred to as the “First stage bootloader”. The ROM is hard-coded into the ESP32C3 and … Read more
If you don’t want to miss my updates, remember to check the public account in the upper right corner and mark it as a star. Send me a star! A development board connected to a screen, mouse, and keyboard becomes a mini PC and can also be used for AI project development. Do you want … Read more
1. Overview OTA (Over-The-Air) is a method for remotely updating device firmware or software through wireless communication technology. This technology is widely used in modern IoT devices, smartphones, cars, embedded systems, etc., providing a convenient update method without physical connections. The core of OTA updates is to enable devices to automatically, reliably, and securely obtain … Read more