Overview of EMMC Protocol Whether EMMC V4.5 or V5.1, the protocol can be quite extensive, making it difficult for newcomers to grasp the key points or analyze effectively. This article mainly summarizes some important and commonly used aspects of the EMMC protocol. 1. Basic Understanding of EMMC 1.1 Physical Lines: Card Concept (eMMC) Physical Interface … Read more
Abstract: This design guide discusses several important aspects of the RS-485 standard, aimed at helping engineers design data transmission circuits correctly. 1 Introduction In 1983, the Electronic Industries Association (EIA) approved a new balanced transmission standard known as RS-485. It has been widely praised and applied in industrial, medical, and consumer products, making RS-485 a … Read more
Among various solutions for medium to long-distance communication between MCUs, RS-485 is widely used in factory automation, industrial control, community monitoring, and water resources automatic reporting due to its simple hardware design, ease of control, and low cost. However, the RS-485 bus still has defects in anti-interference, adaptability, and communication efficiency. Improper handling of some … Read more
Currently, common serial interfaces include UART, 232, 422, 485, CAN, etc., but for beginners, it is generally difficult to understand their differences and when to use them. In industrial applications, not all serial interfaces are the same. For instance, the RS-485 serial interface meets the requirements of high speed and industrial robustness, making it a … Read more
RS-485 belongs to wired transmission, so it requires a hardware transmission medium, which can actually be just two wires. The signal transmitted over these two wires is the same; the sender splits this signal into two, but the receiver restores it to the original signal. The advantage of this method can be compared with RS-232; … Read more
Compressor Technology Report Editor: Lu Sanbian Legal Advisor: Cui Daodao A gentleman has three transformations: he appears dignified from a distance, is warm upon approach, and speaks with authority. Understanding the RS-485 Communication Protocol Introduction In this article, we will delve into the world of the RS-485 communication protocol. If you are already familiar with … Read more
Welcome to the Chip Talent Network to search for chip talents and positions. Source: EETOP compiled from allaboutcircuits Bluetooth LE (BLE) is a Bluetooth protocol designed specifically for ultra-low power applications. In this article, we will learn how BLE has become an energy-efficient short-range wireless connectivity technology. Before diving into the details of BLE, let’s … Read more
Hello everyone, this article introduces the MQTT protocol and how to use the MQTT client and develop it in the OpenWrt system, along with relevant example code. Introduction to MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight communication protocol designed for transmitting messages in low bandwidth and unstable network environments. It was originally developed … Read more
The MQTT protocol, which stands for Message Queuing Telemetry Transport, is a lightweight messaging protocol based on the publish/subscribe model, designed for the Internet of Things. Here’s a detailed introduction: Protocol Basics Protocol Overview: MQTT was originally developed by IBM to provide a simple and efficient messaging communication method for resource-constrained devices and low-bandwidth, high-latency … Read more
The previous two articles discussed the basic decomposition process of the MQTT protocol. This chapter mainly discusses the implementation of specific messages. Since the message handling specifications are quite similar, we will introduce the Connect and Publish messages, which are relatively complex in the MQTT protocol. Understanding the protocol analysis of these two messages will … Read more