The ATiD 870 Hand-Held UHF RFID Reader has been designed to provide long range reading for UHF ISO18000-6 B/C tags and labels. It has an outstanding reading performance with reading distances of up to 2m. Support WIFI, Bluetooth, GPS+BDS and other functions. Send Inquiry. Product Details. One USB 2.0 port(OTG supports U Flash Disk, Mouse, 100M ethenet), one charging mouth, one TF card(128G), one SIM card. SR176, SRIX4K (TYPE-B), I- Code2, TI RFID label-it HF-I, EM4034, Mifare Classic ETC. Identification distance. Designers have many choices when it comes to wireless connectivity in applications ranging from human interface devices (HIDs) to remote sensors for the Internet of things (IoT). One of the more fundamental decisions that need to be made, and one that many designers still wrestle with, is whether to go with a standards based RF interface such as Wi-Fi, Bluetooth, or ZigBee, or a proprietary RF physical layer (PHY) design and protocol. The reasons for choosing one over the other are many, but so too are the relative tradeoffs in terms of cost, security, power consumption, interoperability, design time, robustness in the face of interference, coexistence, latency, and certification requirements. Many of these tradeoffs are interrelated so designers must first determine the design requirements, then optimize accordingly. This article will discuss the factors to be considered when choosing between a standard Bluetooth interface and a proprietary RF protocol. It will then introduce a Bluetooth 5 module, followed by a silicon solution upon which a proprietary protocol can be implemented, with appropriate guidelines for each on how to quickly get up and running. Proprietary RF pros and cons The case for proprietary PHY and protocol is strong if a design requires optimization in the direction of security, low power, small footprint, and performance. Security is critical for many applications, from garage door openers to IoT devices. With proprietary radios, it is addressed in a number of ways. To start, proprietary designs ensure “security-through-obscurity,” in that an RF interface that isn’t well known is harder to hack. Torrent como crackear power dvd 12 activation key. There’s also the tendency for proprietary interfaces to be point-to-point, or to operate in closed systems that don’t connect to wider networks, and so stay hidden. Finally, designers of proprietary interfaces are free to develop their own advanced encryption algorithms or tweak established ones, without having to be interoperable with security algorithms from other manufacturers. Just being different is, in itself, a security advantage. Proprietary radio designs can be advantageous when it comes to ensuring a robust connection in the face of interference from Wi-Fi networks, microwave ovens, cordless phones, and other low-power wireless networks. Without being tied to a standard, designers have the flexibility to make better use of the spectrum using techniques such as direct-sequence spread spectrum (DSSS) and frequency hopping spread spectrum (FHSS). In addition, they can adopt their own preferred coding scheme based on their expected link budget to get higher throughput or lower power consumption. This flexibility also applies to the data packet structure. Without the packet overhead required to ensure interoperability with standards based wireless devices, the packet structure can be streamlined according to the needs of the application. From a hardware design point of view, well-understood performance requirements and assurance that those requirements will not change at a later stage, allows designers of a proprietary RF interface to be optimized for space, power, and performance. They can do so by again including only those functions required to meet the application’s needs. While proprietary RF has many advantages, there are a number of factors that must be taken into consideration. The first is cost: to justify the non-recurring engineering (NRE) cost of a custom RF IC design and associated software, especially for low-cost devices, the expected volume should be >100,000. Tightly coupled with cost is the design time, especially given the vagaries of RF design and the well-documented scarcity of RF expertise, as well as the time taken to develop the firmware and software required for a successful design. Bluetooth widely adopted, always adapting On the other extreme is Bluetooth. Originally designed as a straightforward point-to-point cable replacement technology for HIDs and other devices that were entangling users, it soon became a wireless audio and device-to-device connectivity solution.
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