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Compact automatic weather station convenient and fast data networking function Small automatic weather station, professional for the collection of air temperature, humidity, light intensity, wind speed, direction, rainfall and other meteorological parameters. We will implement automatic monitoring of comprehensive ecological information on facility agriculture, automatic control and intelligent management of the environment. Provides wired transmission and wireless transmission in two ways:
1. Wired transmission mode: Through standard RS232/RS485/USB communication interface, it is wired to the PC of the monitoring center, the longest cable communication distance can reach 1000 meters, real-time transmission of collected data, and a center-to-many network interface Real-time monitoring of the site;
2. Wireless transmission mode: According to the different communication distances, it can be divided into three types: short-range wireless data transmission, medium-range wireless data transmission, and long-distance wireless data transmission.
(1) Short-distance wireless data transmission mode: It adopts advanced microwave radio frequency communication transmission module and the communication distance is within the range of 0 to 300 meters. It is mainly suitable for data transmission in short distances on campus, in the field, without any communication. cost.
(2) The medium-distance wireless data transmission method: The data transmission is performed by using the radio method, and the communication distance is within the range of 0 to 2000 meters, which is mainly suitable for the remote location of the weather monitoring station and the weather monitoring center and is not suitable for the communication of the cable. In case of use, it does not charge any communication costs. Data transmission is stable.
(3) Long-distance wireless data transmission: using GSM network/GPRS network communication technology, combined with Internet network communication protocol, equipped with wireless communication controller can realize monitoring center for real-time monitoring of various sites, remote collection of meteorological data at each monitoring site, Not limited by distance, reliable data transmission.
The GSM communication mode uses the short message mode to transparently transmit data. As long as the network signal coverage area can carry out data transmission and is not limited by the geographical environment, the current environment meteorological parameters can be sent to the user according to the specified interval. For mobile phone numbers set by the user, the communication fee is calculated based on the information service fee, which is suitable for systems with less sites and less data.
The GPRS wireless communication mode is a new wireless data transmission service developed on the existing GSM system. The purpose is to provide Chinese mobile users with high-speed wireless IP or X.25 services. The theoretical bandwidth of GPRS can reach 171.2 Kbit/s. The TCP/IP connection is provided on this channel and can be used for applications such as INTERNET connection and data transmission. GPRS allows users to send and receive data in the end-to-end packet transfer mode without the need to utilize circuit switched mode network resources. GPRS is always online, according to traffic accounting, thus providing an efficient, low-cost wireless packet data service. Especially suitable for intermittent, sudden and frequent, multi-disperse, small and medium-sized data transmission, but also for occasional large data transmission.
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