Tignoolajiyada wireless-ka Zigbee, WiFi iyo 433MHz astaamahooda

Tignoolajiyada wireless-ka Zigbee, WiFi iyo 433MHz astaamahooda

Zigbee, WiFi iyo 433mhz waa saddex teknoloji oo kala duwan oo loogu talagalay isgaarsiinta wireless-ka oo gaaban. Tiknolojiyad kasta waxay leedahay faa'iidooyinkiisa iyo qasaasadeeda.

ZigBee waa awood yar, si aad ah loogu kalsoonaan karo, Teknolojiyadda shabakadda ee Mesh ee Wireless. Adigoo adeegsanaya wadooyinka, Kaliya maaha goobta daboolka shabakadda si fudud ayaa loo ballaarin karaa oo la hagaajin karaa, but also the “blind spot” in wireless communication environment can be eliminated. Intaa waxaa dheer, Zigbee supports star, tree and mesh topologies. Sidaa darteed, Zigbee is well-suited for both simple and complex built environment. Compared to the WiFi, si kastaba ha ahaatee, Zigbee’s data rate is 250kbps, lower than WiFi’s 11Mbps-54Mbps. That makes Zigbee inappropriate for high data rate applications, such as internet surfing, large file downloading or uploading. For restaurant and catering industry, si kastaba ha ahaatee, the data exchanged between server and terminals generally are just small amount. Sidaa darteed, Zigbee is a quite suitable technology for ordering application.

WiFi can support high-data-rate applications. It also supports “always-on” feature, which makes the WiFi attractive for some applications. Si kastaba ha ahaatee, it has some drawbacks which have been noticed by the consumers, such as high power consumption, low reliability, long reconnection time, iwm.

433MHz technology has been widely used in China for restaurant ordering application. Since it uses relatively low frequency band, its wireless signal can be transmitted further than Zigbee and WiFi, which operates in 2.4GHz band. Si kastaba ha ahaatee, the data rate of 433MHz is only 9.6kbps, much lower than WiFi and Zigbee’s data rate. Sidaa darteed, 433MHz suits the application in which only small amount of data needs to be transmitted. Intaa waxaa dheer, same as WiFi, 433MHz supports star topology only, which may cause “blind spot” within the wireless network coverage area.

Different from the WiFi’s “always-on” feature, in Zigbee and 433MHz system, the wireless link is established only when there is data need to be transmitted. This mechanism can dramatically reduce the interference to other devices in the network. The power consumption of the device is also reduced. Si kastaba ha ahaatee, If “always-on” is requested in Zigbee or 433MHz system, a function can be designed in the application software to support this feature.
(Xigasho: Shehzhen Seabreeze Smart Card Co., Ltd.)