Ant
From emboxit
Contents
ANT Low Power proprietary wsn protocol for Nordic and TI
from wikipedia: A more direct comparison can be drawn with ZigBee. ZigBee is based on the IEEE 802.15.4 standard PHY and Media Access Control (MAC) layers, and supports the ZigBee Alliance's own Network (NWK) and Application (APL) layers (refer to the OSI model). ZigBee's IEEE 802.15.4 PHY for the 2.4 GHz frequency band has a raw data rate of 250 kbit/s,[8] compared to ANT's 1 Mbit/s,[6] requiring ZigBee to stay on air longer than ANT to transmit a given volume of data. ANT transceivers using coin cell-type batteries is claimed to operate up to three years in low use applications.[9] ...... ANT uses an adaptive isochronous network technology to ensure co-existence. This scheme provides the ability for each transmission to occur in an interference free time slot within the defined frequency band. The radio transmits for less than 150 µs per message, allowing a single channel to be divided into hundreds of timeslots. The ANT messaging period (the time between each node transmitting its data) determines how many time slots are available. ANT's adaptive isochronous scheme doesn't require a master clock. Transmitters start broadcasting at regular intervals but then modify the transmission timing if interference from a neighbor is detected on a particular timeslot. This flexibility allows ANT to adapt to hostile conditions but ensures there is no overhead when interference is not present. If the radio environment is very crowded, ANT can use frequency agility to allow an application microcontroller-controlled "hop" to an alternative 1 MHz channel in the 2.4 GHz band which can then be subdivided into timeslots.
Nordic and nRF24AP1
General
- Nordic ANT home
- Nordic ANT Message Protocol and Usage ANT Message Protocol and Usage
- Nordic [http://www.nordicsemi.com/eng/Products/ANT/nRF24AP1 downloads
nRF24AP1
The nRF24AP1 is a combination of the nRF2401A with a masked in protocol called 'ANT' and a simple to use serial interface.
- Transceiver nRF24AP1 with Trace Antenna SPARKFUN at $25. Interesting comments in the Sparkfun product page FORUM
- http://www.futurehouse.gr/index.php?main_page=product_info&cPath=1478_1537&products_id=3659
- http://www.futurehouse.gr/index.php?main_page=product_info&cPath=1478_1537&products_id=3860
- ANT NORDIC SEMICONDUCTOR - NRF24AP1 - IC, TRANSCEIVER, 2.4GHZ, QFN24 at FARNELL
nRF24L01+ (without ANT)
On-board 3.3V LDO Regulator (3.3 to 7V supply allowed) On-board ceramic 2.4GHz Antenna 100m Range at 250kbps 250kbps to 2Mbit Data Rate Auto Acknowledge Auto Re-Transmit Multiceiver - 6 Data Pipes 32 Byte separate TX and RX FIFOs 5V tolerant input pins Software selectable channel from 2400MHz to 2525MHz (125 Selectable channels) Minimum number of external components Pins broken out : VCC, CE, CSN, SCK, MOSI, MISO, IRQ, GND Lots of application notes and support on Nordic Semiconductor Website
from mbed The Nordic Semi nRF21L01+ is a single-chip, 2.4GHz band wireless transceiver, capable of up to 2Mbps air data rate, multi-point reception, and auto-acknowledge / auto-retransmit. The nRF24L01+ consumes only 11.3mA while transmitting, and 13.5mA while receiving. It has a simple 6-pin digital connection, including a 4-wire SPI interface, an interrupt pin and dedicated transmit/receive enable pin. Sparkfun's module includes a chip antenna, and claims a range of 100m.
ANT thisisant company
- ANT company
- ANT home
- ANT - Wireless connectivity at WikID, the Industrial Design Engineering Wiki
TI
- CC2570 AND CC2571 still ZERO stock at distributors
- Mouser stock 2048pcs, 3,44 €, 2012.05.15
- TI ANT home
