An IQRF intelligent wireless technology and MESH networks can be successfully utilized in a record short time, even with only basic electronic skills. Intelligent houses, data transfer, remote switching of lighting, these are only few examples of usage of modern technology called IQRF. A wireless data transfer usable for example to control various devices, can be in general reached by four basic ways:
1) RF chip, microcontroller, development of your own SW
2) RF module
3) RF module with an operating system
4) RF module with an intelligent super-structure (layer)
Time and knowledge necessary to reach a final product at above-mentioned ways are illustrated in the following pictures:
The IQRF technology enables to use third and fourth from the above-mentioned possibilities. Probably the most interesting is the 4-th alternative, which is practically immediately usable with a minimal effort by means of a so called PDA protocol (Direct Peripheral Addressing). DPA is a protocol enabling to create, control and modify even large wired and wireless networks and bi-direct data transfer without a (classic) programming. DPA protocol consists of 4 bytes (3+1) containing an address in a network (NAdr), peripheral number (PNum), a command specific for a given periphery (PCmd) – for example switching of an LED and alternatively also the 4-th byte – data (up to 58 bytes/1 packet). For various peripherals, it is possible to define a so called Hardware profile (HWP), which translates a given DPA packet to a specific action of a given device (for example after pressing a push-button a packet will be sent to a destination device with information to switch on the light).
The basis of the whole IQRF system is the miniature RF transceiver modules working on the 868 MHz frequency (alternatively 916 MHz) with an ultra low power consumption and adjustable RF power. All setting and routing of the IQMESH network runs automatically, literally by “one click” and the data transfer itself functions on the principle of transmission from one module to another, until the given information reaches a destination transceiver (Node).
Detailed information can be found in the forthcoming SOS webinar about the IQRF , in the documents IQRF_Technical_Guide, IQMESH and on the www.iqrf.org website. In case of interest, please contact us at firstname.lastname@example.org.
IQRF – a wireless technology which breaks barriers – [Link]
by Publitek European Editors:
Near-Field Communication (NFC) is an evolution of radio frequency identification (RFID) tag technology that allows objects to respond to the tap of a mobile device. Although the tags are being used for making payments from a wireless bank card or a mobile phone, there are many more applications. NFC takes the identification and low cost capabilities of RFID and extends them with processing and authentication within the NFC tag. This transforms the already dynamic mobile user experience in a way that enables the “Internet of Things”. Tags in “smart posters” or location based check-in signs, games or media content on a friends’ tablet, and ticketing or payment terminal contactless readers can now interact with your mobile device in a secure yet simple way. NFC technology is even being used in secure access systems to replace locks and to provide information on the label of a wine bottle.
Getting Started With NFC - [Link]
by Publitek European Editors:
In today’s wireless, connected world, ambient Radio Frequency (RF) energy is everywhere. Technically, this free-flowing energy can be captured, converted and stored for use in other applications. In fact, it is already in use in a number of ultra-low-power, battery-free applications, such as RFID tags, contactless smart cards, and wireless sensor networks. As a result of technological advances, harvested RF energy is just beginning to realize its wider potential, including charging batteries in smartphones and other portable devices. These enabling technologies include RF transceivers, power conversion circuits, and ultra-low-power microcontrollers, all of which are becoming ever more efficient.
Tune In, Charge Up: RF Energy Harvesting Shows its Potential - [Link]
RFID reader / writer SL500F gladly communicates with any 13,56MHz RFID card.
For a concrete application we usually need only one type of an RFID communication. For the sophisticated devices or for devices intended for configuration of various RFID cards, a reader handling all common protocols can be very convenient.
SL500F, a novelty in our offer, handles ISO ISO14443A, ISO14443B as well as ISO15693, what practically means a support of all common RFID systems working on the frequency of 13,56 MHz. Similarly like SL500A, which we introduced to you in our article – „Plug´n´play“ desktop RFID modules with a USB interface, also for the SL500F there´s a free-to-download software including a DLL library and examples. Detailed description can be found in the SL500 datasheet.
In case of interest, please contact us at email@example.com.
SL500F – a „full-featured“ RFID device – [Link]
This article shows you how to build a very simple FM transmitter from thirteen components, a Printed Circuit Board (PCB) and a 9v battery. This project was designed to be mounted on a PCB, however you don’t have to. You could construct the project on Vero board (strip board) or any other 0.1” pitch style of project board. If you just want to experiment with this circuit, you don’t even need a board; you can just solder the component s together and let the completed project just rest on the work top. No matter which style you choose, try to keep all component leads nice and short. You could also make the PCB much smaller than the one shown here which is approx. 3 cm square. This is a good size to keep the unit small but nicer to work on for beginners. If you wanted to make one really small, you could use all SMT parts.
Simple FM Transmitter - [Link]
Guan Yang of HackManhattan writes about his efforts working with a Bluetooth low energy component:
This amazing component is the Nordic nRF51822 that was released last year and is now available for order from Mouser. It’s a Bluetooth Low Energy system-on-chip that includes a transceiver and a Cortex-M0 microcontroller.Here’s a breakout board I made for it, using a Johanson balun and chip antenna. It takes a little help from the Internet, but I got it to work with Nordic’s SDK and the gcc-arm-none-eabi toolchain. Haven’t tried debugging yet.
HackManhattan’s Nordic nRF51822 breakout board - [Link]
VHF FM Aircraft receiver:
VHF FM Aircraft Receiver is a superregenative receiver developed for listening to FM transmitters but also tunes the aircraft band and the top portion of the FM broadcast band. Receives both AM and FM (107mHz to 135 MHz). You can use this receiver with the any FM transmitter. The receiver is amazingly simple using only one transistor for the receiver section and one IC for the audio section. This circuit is a self-quenching regenerative RF receiver also known as a superregenerative receiver.
VHF FM Aircraft receiver - [Link]
Analog Devices, Inc. (ADI) released a new version of its popular ADIsimRF design tool:
The free design tool is the software accompaniment to ADI’s complete portfolio of RF-to-digital functional blocks, allowing engineers to model RF signal chains using devices from across ADI’s RF IC and data converter portfolio. ADIsimRF Version 1.7 adds a number of new device models along with enhanced support for inter-stage mismatch calculations. The design tool provides calculations for the most important parameters within an RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption. The ADIsimRF design tool contains embedded data from many of ADI’s RF ICs and data converters, which designers can easily access using pull-down menus to assist in component selection.
Analog Devices releases free version of RF design tool - [Link]
Have you ever wanted to send data from a sensor or project wirelessly? This simple circuit allows you to build your own wireless transceiver using two ICs, a transistor, and two resistors. The IC is from Melexis and uses On-Off Keying modulation and can be battery powered.
Here is the circuit.
DIY Wireless Data Transceiver - [Link]
GSM, DCS, PCS, UMTS, 434/868 MHz, GPS, TETRA and many other signals are no problem for small ceramic antennas from company 2J.
Among products from company 2J, which can be found in our stable stock offer, we recently incorporated miniature ceramic SMT antennas enabling to create miniature closed devices without any external antennas, connectors, cables, …
● 2JE03 – 5-band SMT antenna for GSM850, GSM900, DCS, PCS and UMTS (1710-2170 MHz) bands. With dimensions of only 24×5.5×4.4mm, it represents a miniature solution for a wide spectrum of applications.
● 2JE05 – extremely small (9x3x1,2mm) SMT antenna intended for free bands 434 MHz, 868 MHz and 915 MHz. The antenna can be easily matched for a given frequency band by means of a few passive LC components (matching circuit). 2JE05 features a relatively very good standing waves ratio (VSWR) max 2.0:1 in the whole range.
Detailed specification of these antennas can be found in the 2JE03 and 2JE05 datasheets. A comprendious overview will provide you the 2J catalogue as well as catalogue of internal (embedded) antennas. Upon order, we´re able to provide you any antenna from the 2J portfolio. In case of interest, please contact us at firstname.lastname@example.org.
Miniature SMT antennas 2J are able to cover several bands - [Link]