About GPRS communication
GPRS is the abbreviation of General Packet Radio Service. It breaks through the way of thinking that the GSM network can only provide circuit switching, and realizes packet switching by adding corresponding functional entities and partially transforming the existing information base station system. , the investment in this transformation is relatively small, but the user feedback data rate is very impressive. GPRS (General Packet Radio Service) is a data transmission technology based on the Global System for Mobile Phones (GSM), which can be said to be the continuation of GSM. GPRS is not different from the previous continuous channel transmission method. GPRS transmits in a packet (Packet) format, so the cost borne by the user is calculated in the unit of transmission data, not the entire channel used. Theoretically, It’s a bit cheaper than that. модбус Ethernet
The transmission rate of GPRS can generally be increased to 56bps or even 114Kbps. Because there is no longer a need to add a communication intermediary switch to existing wireless applications, both connection and transmission are more convenient and easier. Therefore, users can choose to surf the Internet online, participate in video conferences and other interactive communication, and users on the same video network (VRN), even without dial-up Internet access, and continue to maintain a connection to the network.
GPRS technology embodiment
Wireless packet-switching technology
GPRS general wireless packet service is a wireless packet switching technology based on the GSM system. Packet switching technology, also known as (data) packet switching technology, divides the data transmitted by users into a certain length. A part of a separate area is called a packet, a technique for transmitting information by transmitting packets. It is a kind of exchange technology that realizes the communication between computers and computers through computers and terminals. The quality of transmission routes is not high and the network technology means is relatively simple. There is a packet header (packet header) in front of each packet to indicate which destination address the packet is sent to, and then the switch forwards each packet to the destination according to the address mark of each packet. This process is called packet switching.
packet technology
The so-called packet means that data must undergo some specific processing in the communication system before it can be transmitted in the network. A specific communication protocol is used for data transmission. This process is like packaging and dispatching packages according to classification, which is called packaging.
GPRS transparent transmission module
E840-TTL-GPRS03 is a GPRS transparent transmission module launched by Ebyte. The software has complete functions and covers most of the conventional application scenarios. With simple settings, two-way data transparent transmission from the serial port to the network server can be realized. The module uses 2.0mm pin headers to facilitate the integration of user equipment and uses a wide voltage of 5V to 20V for power supply. It supports mobile and China Unicom 2G cards. конвертировать ethernet в wi-fi The communication and LED indication use compatible levels. The default 3.3V can be applied to the 5V level. It has the anti-interference ability and can be used in some environments with strong electromagnetic interference, such as in some power industries.