What components are full duplex communication

As long as the hardware channel is sufficient, and the transport protocol itself allows it.

422, 232, etc.

1. Simplex communication refers to the working mode in which messages can only be transmitted in one direction.

Features: In simplex communication, the communication channel is one-way, and the sender and receiver are fixed, that is, the sender can only send information, but cannot receive information; The receiver can only receive information, not send information. In this case, the data signal is sent from one end to the other, and the signal flow is unidirectional.

2. Half-duplex communication can achieve two-way communication, but it cannot be carried out in both directions at the same time. It has to be done alternately.

Features: This method can convert the sender to the receiver; Correspondingly, the receiver can also be converted to the sender. But at the same time, information can only be transmitted in one direction. Therefore, half-duplex communication can also be understood as directional switch simplex communication.

Features: Full-duplex communication allows data to be transmitted in both directions at the same time, also known as two-way simultaneous communication, that is, both parties can send and receive data at the same time. In full-duplex mode, there is a transmitter and a receiver at each end of the communication system, which allows data to be transmitted in both directions simultaneously.

1. Different definitions.

1. Simplex communication refers to the working scum buried type where messages can only be transmitted in one direction, and there can only be communication in one direction without interaction in the opposite direction;

2. Half-duplex communication means that data can be transmitted in two directions, but a half-duplex bus structure channel at the same time is only allowed to be transmitted in one direction, so it is also called two-way alternating communication;

3. Full-duplex communication is called two-way simultaneous communication, that is, the two sides of the communication can send and receive information at the same time.

Second, the way of working is different.

1. In simplex communication, the communication channel is one-way, and the sender and receiver are also fixed, that is, the sender can only send information, but cannot receive information; The receiving end can only receive information, but cannot send information, based on this situation, the data signal is transmitted from one end to the other end, and the signal flow is unidirectional; Examples: TV, radio.

2. Half-duplex communication can realize two-way communication, but can not be carried out at the same time in two directions, and must be carried out alternately in turns. Correspondingly, the receiver can also be transformed into the sender. But at the same time, information can only be transmitted in one direction, so half-duplex communication can also be understood as a simplex communication that switches directions; Example: Walkie-talkie.

3. Full-duplex communication refers to the two-way signal transmission of A to B and B to A on the line at any time of communication, and full-duplex communication allows data to be transmitted in two directions at the same time, also known as two-way simultaneous communication, that is, both sides of communication can send and receive data at the same time, in full-duplex mode, each end of the communication system is provided with a transmitter and a receiver, therefore, the data can be controlled to be transmitted in two directions at the same time; Example: Communication.

Third, the application field is different.

1. Simplex communication only supports signal transmission in one direction (forward or reverse), and the transmission direction of the signal cannot be changed at any time. This method is suitable for data collection systems, such as the collection of meteorological data, the centralized calculation of ** fees, etc.;

2. Half-duplex communication allows signals to be transmitted in two directions, but only one-way transmission of signals on one channel at a time. Therefore, half-duplex communication is actually a simplex communication that can switch directions. This method is suitable for data communication systems such as inquiry, retrieval, and scientific computing;

3. Full-duplex communication allows data to be transmitted in two directions at the same time, that is, there are two channels, so two-way transmission is allowed at the same time. Full-duplex communication has high efficiency and simple control, but high cost. Communication between computers is full-duplex.

The general electric and mobile phones are also full-duplex systems, because they can also hear each other's voices when speaking.

When talking about communication, we consider the direction in which the message will be traveled, and when and when it will be received. Gongtong half-work communication and full-duplex communication refer to different transmission methods.

1.In simplex communication, data is transmitted in only one direction, with one device acting as a transmitter (or transmitter and another device acting as receiver). The transmitter can only send data, and the receiver can receive data at the time of the proceeds.

This means receiving data at the same time. A typical example is wide-vision or line-to-radio. In this case, the information is only sent from the tower to the receiver, and the receiving device cannot send the message back to the tower.

Semi-dual communication: In semi-communication, data can be transmitted in both directions and cannot be done at the same time. A device is a transmitter that executes one at any given moment.

The signaling device is switched so that it can be switched between sending and receiving. Walkie-talkie is a common example of part-time communication, when one is talking, one must be received, and vice versa, it is also planted in a single party upload can be alternated.

3.Full-duplex communication: In full-duplex communication, data can be transmitted simultaneously in two squares. The device can act as both transmitter and receiver without the need to switch.

This type of communication allows the device to send and receive data at the same time, enabling true communication to the public. Our common call is a typical example of full-duplex communication. When two people are on a call, they can talk and listen at the same time, while waiting for the completion of the summary - simplex communication allows for a party, such as a view.

Industrial communication two upward transmission, but not at the same time, such as the machine Qingchun.

Full communication allows data to be transmitted simultaneously in the direction to achieve true communication, such as ** call.

Hopefully, the above explanation will help you better understand the zone between single-, dual-, and full-duplex communications.

Simplex communication: Data information is always transmitted in one direction on the communication line. Data information is always transmitted from the sender to the receiver.

For example, radio and television are simplex transmission methods, and radio and television sets can only receive signals from radio and television stations separately, and cannot transmit information in the opposite direction.

Half-duplex communication: The data message can be transmitted in both directions, but it must be carried out alternately, and only one-way transmission is allowed on one channel at the same time. Half-duplex communication requires a B end to have a sending device and a receiving device, if you want to change the transmission direction of information, there is a switch K1 K2 to switch, and then at any time to ensure that the A end of the sending device and the B end of the receiving device A end of the receiving device and the B end of the sending device intervene in the channel.

Half-duplex communication is efficient due to the reversal of the direction of the channel in the communication. For example, walkie-talkie communication is a typical half-duplex communication mode, when one party speaks, the other party can not speak, but it can be switched by opening and collapsing the letter standby switching, which can change the fairy tale mode.

Duplex communication: Simultaneous two-way communication in two directions, both channels and two-way data transmission can be carried out at the same time. It is equivalent to combining two simplex communication methods in opposite directions.

Full-duplex communication has high efficiency, easy control, and communication between taxis and computers, ordinary ** is a typical full-duplex communication.

Simplex: Broadcasting - information can only be transmitted from the radio station to the radio, unidirectional irreversible.

Half-duplex: walkie-talkie-information can be exchanged with each other, so it can be called duplex, because information can be obtained in both directions, but at the same time can only be transmitted by one party and received by the other party, and the transmission and reception cannot be carried out at the same time, so it is called half-duplex.

Duplex: ** - Both parties can send and receive messages at any time during communication.

Simplex communication: the pager can only accept information half-duplex communication: the walkie-talkie can send and receive messages from both sides but cannot send full-duplex communication at the same time: both sides of the mobile phone can send messages or receive messages at the same time.

Simplex communication: the signal can only be transmitted in one direction, and the transmission direction of the signal cannot be changed at any time;

Half-duplex communication: the signal can be transmitted in both directions, but it must be alternate, and it can only be transmitted in one direction at a time;

Full-duplex communication: Signals can be transmitted in both directions at the same time.

1) Simplex communication refers to the working mode in which messages can only be transmitted in one direction. Only one of the two communicating parties can send, and the other can only receive.

2) Half-duplex communication refers to the working mode in which both sides of the communication can send and receive messages, but cannot receive and receive messages at the same time.

3) Full-duplex communication refers to the working mode in which both parties can send and receive messages at the same time.

Half-duplex data transfer allows data to be transmitted in both directions, but at a certain point, data is only allowed to be transmitted in one direction, which is actually a simplex communication that switches directions; Only one party can receive or send information at the same time, and two-way communication can be achieved. Example: Walkie-talkie.

Full-duplex data communication allows data to be transmitted in both directions at the same timeTherefore, full-duplex communication is a combination of two simplex communication methods, which requires both the sending device and the receiving device to have independent receiving and transmitting chain capabilities, and can receive and send information at the same time to achieve two-way communication. Example: Communication.

Standard. RS-485 standard is a half-duplex communication protocol, RS-485 is suitable for both sending and receiving morning travel to share a pair of lines for communication, and also suitable for sharing a pair of lines between multiple points for bus networking.

RS-485 interface chips have been widely used in many fields such as industrial control, instruments, meters, multi-** networks, mechatronics products, etc. There are also more and more types of chips that can be used for RS-485 interfaces. How to find the most suitable chip among a wide variety of interface chips is a problem in front of every user.

The RS-485 interface has different requirements for chips and usage methods in different use occasions. What factors should users consider in the selection of chips and the design of circuits, due to the inherent characteristics of some chips, some faults in the communication of land calls and sales even need to be adjusted accordingly in the software. The RS-485 interface can be connected to both half-duplex and full-duplex communication modes.