ເຕັກໂນໂລຊີໄຮ້ສາຍ Zigbee, WiFi ແລະ 433MHz ລັກສະນະຂອງເຂົາເຈົ້າ

ເຕັກໂນໂລຊີໄຮ້ສາຍ Zigbee, WiFi ແລະ 433MHz ລັກສະນະຂອງເຂົາເຈົ້າ

Zigbee, WiFi ແລະ 433mhz ແມ່ນສາມເຕັກໂນໂລຢີທີ່ແຕກຕ່າງກັນສໍາລັບການສື່ສານໄຮ້ສາຍໄລຍະສັ້ນ. ແຕ່ລະເຕັກໂນໂລຢີມີຂໍ້ດີແລະຂໍ້ເສຍປຽບ.

ZigBee ແມ່ນອໍານາດຕ່ໍາ, ທີ່ເຊື່ອຖືໄດ້ສູງ, ເຕັກໂນໂລຢີເຄືອຂ່າຍຕາຫນ່າງໄຮ້ສາຍ. ໂດຍການນໍາໃຊ້ routers, ບໍ່ພຽງແຕ່ພື້ນທີ່ການຄຸ້ມຄອງເຄືອຂ່າຍສາມາດຂະຫຍາຍໄດ້ງ່າຍແລະດັດປັບ, but also the “blind spot” in wireless communication environment can be eliminated. In addition, Zigbee supports star, tree and mesh topologies. ເພາະສະນັ້ນ, Zigbee is well-suited for both simple and complex built environment. Compared to the WiFi, ແນວໃດກໍ່ຕາມ, 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, ແນວໃດກໍ່ຕາມ, the data exchanged between server and terminals generally are just small amount. ເພາະສະນັ້ນ, 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. ແນວໃດກໍ່ຕາມ, it has some drawbacks which have been noticed by the consumers, such as high power consumption, low reliability, long reconnection time, ແລະອື່ນ.

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. ແນວໃດກໍ່ຕາມ, the data rate of 433MHz is only 9.6kbps, much lower than WiFi and Zigbee’s data rate. ເພາະສະນັ້ນ, 433MHz suits the application in which only small amount of data needs to be transmitted. In addition, 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. ແນວໃດກໍ່ຕາມ, If “always-on” is requested in Zigbee or 433MHz system, a function can be designed in the application software to support this feature.
(ທີ່ມາ: Shehzhen Seabreeze Smart Card Co., Ltd.)