rs485 pinout

the GPRS mobile data communication terminal provided by CCN.3. User Registration: It complies with the regulations of the tap water company.(3) Product FeaturesThe system uses the SG2000 series GPRS wireless transparent data transmission terminal. The product is based on China Mobile's GPRS network and features high performance, high reliability and strong anti-interference ability, provides a standard 232 Data port that can be directly connected to computers, RTU, PLC, GPS receivers, digital c

The quality of life has been greatly improved, mainly depending on the development of science and technology. Many technology products emerge one after another. Here we mainly explain the design of the Remote Monitoring System Based on Embedded Linux. Embedded Linux has many advantages. Due to its excellent portability, Linux has been successfully run on hundreds of hardware platforms. The following describes the design of the Remote Monitoring System Based on Embedded Linux. 1 Introduction Sin

application interface) Plug-In module defined by the company. It will expand its I/O to the carrier board, attach the plates to the green Phoenix industrial I/O connector (marked with "ASIO Out") on the side of the plate, as described in the following figure. Module extension interface of MyPi As described on the Kickstarter page: "We are more willing to connect the same IO signal to another connector than the HAT board with I/O signal connectors at the side of the board, it is directly connec

Abstract: In view of the slow transmission speed and difficult network connection of traditional devices, a Data Conversion System for serial ports and Ethernet is proposed using w5300 and c8051f120 single chip microcomputer. the RS232 and RS485 chips are used to receive and send low-speed serial data, the single-chip microcomputer c8051f120 is used as the core processing chip, and the w5300 chip is used to send and receive Ethernet data. A specific

messages is summarized as follows: Unable to receive data. Cause: 1. Use an oscilloscope to check whether data is sent from the sending pin; 2. Use an oscilloscope to check whether data is received by the receiving pipe foot; 3. baud rate problem-whether the communications port is consistent; The received data is incorrect because: 1. it may be whether the external clock is used correctly. The default external crystal oscillator of stm32 is 8 MHz. If the incorrect connection is 12 MHz, modify

/UDP packet from the data center, it extracts the data and sends it to the User device through the serial port. Two-way communication with multiple gprs dtu is also implemented through a wired data collection center. This is the most common method in the gprs dtu application system. Core functions (1) internal integration of TCP/IP protocol stack Gprs dtu encapsulates the PPP dialing protocol and TCP/IP protocol stack and has an embedded operating system. It can be viewed as a combination of emb

Wireless synchronous data transmission Communication System Development Kit and application solutions The wireless synchronous data transmission system of Fuzhou Development Zone huiju Communication Technology Co., Ltd. is equipped with a wireless networking protocol stack to provide powerful self-formed and self-restored low-power wireless star network networking technology, it can provide high-precision synchronous output signals, and its synchronization performance is close to that of high-p

RS485, with poor reliability and short distance, it is greatly affected by the geographical environment. 3.3 Energy Metering Electric energy metering is an important part of modern power marketing systems. The traditional electricity settlement relies on manual copying of data to the site on a regular basis, which has many shortcomings in real-time, accuracy and applicability. By combining modern communication technology with computer technology and

sent to the LIMS system through WebService. Its users are lab workers. On a remote workstation, they need to observe the experiment, monitor and manipulate the instrument, need the required data, and finally generate the original record of the experiment. In this project, we do not focus on LIMS, but on DPC. We try to make it the best way for users to use it. As for how to deal with a variety of interfaces, and how to automatically collect data from communication ports and protocols such as

files between the client and the server, provides File Transfer services that are not complex and costly. TFTP is carried on UDP and provides unreliable data stream transmission services. It does not provide access authorization and authentication mechanisms, and uses the timeout retransmission method to ensure data arrival.It can be seen from its name that it is suitable for transferring "simple" files. What is different from FTP is that it uses the UDP 69 interface, so it can traverse many fi

temperature in the regulated power supply system exceeds this range, the heat dissipation unit is automatically started. (4) system status detection function The smart cabinet system displays the LED indicators of its working status and data information collection and alarm, and can be visually displayed on the LCD touch screen. The interface is beautiful, generous, and clear. (5) Smart Device Access The smart cabinet system can be used to connect smart devices, including smart power meters or

Lithium battery, the clock can also work after a full power outage. Sound card resources and interface: The sound card has headphones and headset interface, as well as The speaker package for the PIN2 loudspeaker expansion Port three. Thin-code switch and corresponding function: The iTOP-4412 Development Board can control the starting mode and the output of the video card through the thin code switch. For example, XOM2, XOM3,XOM5 for controlling the 4412 Start-up mode, Ap_sleep , XEINT6 used

modification4hardware Full-duplex serial, built-in transceiver buffer, support communication baud rate 50bps~2mbps5Support Common modem contact signals RTS, DTR, DCD, RI, DSR, CTS6RS232, RS485, RS422 and other interfaces via an external level-shifting device7. Support IrDA specification Sir Infrared communication, support baud rate 2400bps to 115200bps8software compatible with CH341, you can use the CH341 driver directly9support 5V supply voltage and

, which usually causes a large current. If the data communication is not in isolation, the data may be lost and worse, the computer will be compromised.2.4.1 Circuit DescriptionThe schematic diagram shown in Figure 9 is a node of a distributed monitoring, control, and management system that is typically used for process control. The data is transmitted through a pair of twisted pairs, and the ground uses a shielding layer. These applications often require low power consumption because many remot

, OpenVG1.0• Supports Sd/mmc/sdio interface memory card, up to 32GB support JPEG hardware codec, maximum support 8192x8192 resolution2.2 Introduction to Core board resources• Memory: 4G bits DDR2 (512MB)· FLASH:8GB EMMC Integrated single chip power management chip• Integrated 100M Ethernet Card• Integrated AC97 Interface HiFi sound card• System Bus Expansion interface2.3 Backplane Resource Introduction• Onboard RTC• Onboard Standard JTAG interface• Onboard 1 Independent camera interfaces• Onboar

pressing when collecting fingerprints. After pressing, the screen displays the employee's work number, accompanied by a machine voice prompt-Thank you ‖. If the press is not successful,Then there is a voice prompt-please re-press your finger and then press your finger again or change another finger.7. In the 6th step above, we only saw the employee's work number, did not see the name, actually can display the employee's name. Please follow the steps below.8. Install the attendance management sy

~ 99999Expansion coefficient setting range ... 0.1000 ~ + x 10-6/ ℃8. Operation ModeContinuous operation9. Communication(1)RS485 modeMODBUS ProtocolBaud rate ... - , 2400 , 4800 , 9600Maximum distance ... 1.2KM(2) Ethernet modeTCP/IP protocolHundreds of km transmission distance by fiberConditions of UseAmbient temperature ... -40 ~ - ℃Air relative humidity ... Not much more than 95% .Explosion rating of gas mixtures of combustible or flammable gas

This article refers to: Http://bbs.ednchina.com/BLOG_ARTICLE_3013784.HTMMSP430F149 has two usart communication ports, the performance is exactly the same, each communication port can be converted through the RS232 and RS485 chip, and the corresponding serial interface circuit communication. The msp430f149 supports serial asynchronous and synchronous communication, each with a separate frame format and independent control registers.Usart Asynchronous c

bus interfaceFor a Layer two switch, it is how the CPU reads and writes the port transceiver buffers. For a three-layer switch, the port transceiver buffer reads and writes the allotted timeslot, as instructed by the hardware bus controller.Two or two-layer switch programmingLayer three switches are hardware-implemented and are not discussed in this article. The storage and forwarding mechanism requires the CPU to manipulate, in fact, we do not need a complex operating system, just a simple int

(VC) Http://www.dzsc.com/data/html/2009-10-20/79533.html Cserialport class Post6:Multi-serial port multi-thread industrial control implementation (cserialport class) Http://bbs.51cto.com/thread-417831-1.html this article is very good to write, it is worth reading. The following two lines of code tell us the timeout setting when multiple serial port Devices round-robin. If (tnow-tlast) * 1000 + (nnowmillsecond-nmillsecond [0])> 800) 9 x * G8 L4 n! R6 S0 Pview-> setcommval (); // s