Learning about microcontrollers is a long and somewhat painful process. Especially for beginners, it is difficult to form a systematic learning framework when various types of knowledge are incomplete in the early stages. This article aims to provide a thought process and list some essential foundational knowledge before getting into microcontrollers. 1. There are only … Read more
Click Tech Training Top, delivering to you daily at 7:30 AM What are RS232, RS485, UART, serial ports, COM ports, USB ports, and TTL? Do you understand their relationships? First, we need to distinguish between timing standards and logic level standards. Timing standards refer to the logical values (0 and 1) corresponding to actual voltage … Read more
Click the card above to follow for more information 1. Why Do We Prefer Serial Communication? When working on microcontroller products, the most commonly used method is serial communication. For any microcontroller peripherals, those with serial port functionality are prioritized, such as Bluetooth modules, WIFI modules, 4G modules, electric meters, and displays. Why do we … Read more
Many students learning embedded systems often feel confused by various protocols and can’t distinguish their functions. Today, I will clarify the five commonly used protocols in embedded systems, packed with useful information. Without further ado, let’s get started! 01 UART Communication Protocol 1. Principle The data packet in serial communication is transmitted from the sending … Read more
Many technicians encounter the following problem: why can’t my touch screen communicate with the PLC? For instance, here are two issues: 1. Weintek Touch Screen and Siemens PLC cannot communicate, always prompting that the PLC is unresponsive. How should it be set up? Solution: Set the same baud rate, the same bit count, and the … Read more
For more exciting content, follow “PLC Enthusiast” Often, technicians encounter the issue: why can’t my touch screen communicate with the PLC? For example, here are two common problems: 1. Weintek touch screen cannot communicate with Siemens PLC, always indicating no response from the PLC. How should it be set up? Solution Approach: Ensure you set … Read more
It is common for technicians to encounter the issue: why can’t my touch screen communicate with the PLC? Here are two problems that might occur: 1. Weintek Touch Screen Cannot Communicate with Siemens PLC, Always Prompting No Response from PLC. How Should I Set It Up? Solution approach: You need to set the same baud … Read more
The following example connects the MT6103IP touch screen to a Panasonic PLC; other brands of PLCs can be referenced. 1. Determine the connection scheme as follows: 2. Hardware wiring Below are the wiring terminals of the touch screen, which has 9 pins, allowing for one group of RS232 and another group of RS485. 1) RS232 … Read more
In microcontroller development, protocols such as UART, I2C, and RS485 are commonly used, and understanding them can be somewhat ambiguous. This article organizes these concepts. The reading time is approximately 10 minutes. UART Universal Asynchronous Receiver-Transmitter The UART port refers to a type of physical interface (hardware). UART is an asynchronous, full-duplex serial bus. It … Read more
In the previous article “UART Communication Interface Protocol – UART (I) Protocol Basics”, we briefly and meticulously describedUART configuration items and the signal timing of the communication process. This article will continue to introduce some interface specifications used by theUART interface under different electrical characteristics. 1. Introduction In fact,UART only defines the signal timing without … Read more