What are the advantages and disadvantages of equipment inspection, property patrol, common QR code, NFC and Bluetooth?

QR code: It must be used in conjunction with photography or GPS, otherwise it is easy to cheat. Small areas or buildings such as residential areas, factories, hospitals, schools and office buildings cannot use GPS, so the cost of QR code patrol is low, but it is not practical.

NFC: Not all smartphones only have NFC function. Only certain grades of mobile phones have NFC function. Generally, only those above 1.500 yuan have NFC function. Some brand mobile phones have NFC function, and the price is more than 2000 yuan. In addition, NFC card reading distance is very close, only a few millimeters, and the NFC coil position of different mobile phones is different, and the sensitivity of card reading keys is also different, so it is often impossible to read. So NFC is not practical.

Bluetooth: All smart phones have Bluetooth function, and the Bluetooth card has a long reading distance. The reading distance of conventional Bluetooth patrol card is about 5 meters, and the longest reading distance can reach 30 meters. Patrol personnel can read the Bluetooth patrol card as long as they walk within a corresponding distance with their mobile phones. Moreover, Bluetooth cards cannot be copied and cheated. Bluetooth cards need batteries, and generally a battery can be used for more than 5 years.

Fuzhou Kaihe electronic mobile phone patrol is well done, and the software is very easy to use. Reading Bluetooth patrol card is very sensitive. After reading the card, you can take photos, input events, voice, video, upload location and other functions, support multipolar management, intelligent scheduling, unlimited number of mobile phones and computers. Perfect function.