Adeunis RF ARF44 Panduan Pengguna - Halaman 11

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Tips 2 :

Idle line for S214

duration

RXD

line

Exiting command mode

command

ATO <cr>

Transceiver mode

In transceiver mode, the module works with a transparent protocol: When

transmitting, data received from the serial link are transmitted on the radio

link. When data are received on the radio link, these data are sent on the

serial link. The module acts as a wire serial link.

The communication is always half-duplex. The radio transmission is

processed prior to the radio reception (when the transceiver is sending a

radio frame, it is not able to decode any incoming radio frame).

If no data are sent on the serial link, the modem is waiting for radio

reception. Each radio frame sent by another modem is received and the

validated data extracted from the radio frame are sent on the serial link.

All the data received on the serial link are encapsulated in a radio frame.

When acting as transceiver, the radio frame transmission starts as soon has a

char is available on the serial link.

The radio frame format is :

<Preamble><synchro>DATA <postambule>.

Preamble, synchronisation and postambule are used for the radio reception.

Ref. 08-07-V5-lmn

+++ (consecutive)

TRANSCEIVER MODE

(return back in transceiver mode): send the serial

RF44

Idle line for S214

duration

User Guide

COMMAND

MODE

p. 9

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