Shanghai Transportation Investment Information Technology Co.LTD BIST2400 Manual De Usuario

TAG_A_0.0 （Wireless Beacon Transmitter）is a kind of active RFID tag. The

signal which TAG_A_0.0 transmits can be read by READER_A_0.0.1 from 1

meter to 100 meters away.

TAG_A_0.0 and READER_A_0.0.1 compose the Bus Identify System.

In this system, a tag (TAG_A_0.0) that is pasted on the windshield of the bus can

transmit signal continually. The reader (READER_A_0.0.1) that is fixed on some

building can receive the signal, analyze the ID of the tag (which is engraved on

the panel of the tag) to locate the bus which the tag pastes on at that moment,

report the relevant information to the server through the network. A lot of readers

that are fixed on different buildings can report a lot of location information to the

server. And the server can use the information to locate these buses at real time.

This application helps the manager monitor the detailed track of the buses and

dispatch the buses efficiently.

TAG_A_0.0 includes MSP430F2001 which is used as MCU, nRF2402G which

is used as a transmitter, a crystal which supplies clock signal for nRF2402G ,a

3V lithium battery(CR3032) which is used as power supply of TAG_A_0.0, a

monopole antenna on the PCB and a few external passive components.

MSP430F2001 sends the data which includes ID of the tag to nRF2402G and

controls nRF2402G through a 3-wire interface. And the nRF2402G sends an RF

signal to the antenna which acts as a radiator and propagates the signal to the

air.

TAG_A_0.0 transmits a RF data frame every 683 milliseconds. The data frame

includes the information such as the ID number of the tag and the quantity of

electricity of the battery, etc.

Block diagram of TAG_A_0.0

MCU

MSP430F2001

(TI)

2.4GHz RF

Transmitter

nRF2402G

(Nordic)

16MHz

Crystal

2.4~2.4835

GHz

Battery

CR3032