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PDF DRA808M Data sheet ( Hoja de datos )
| Número de pieza | DRA808M | |
| Descripción | 30dBm Wireless Voice Transceiver Module | |
| Fabricantes | Dorji | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DRA808M (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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DRA808M
30dBm Wireless Voice Transceiver Module
DRA808M
V1.11
Features:
Frequency Range: 400~470MHz
Tx/Rx frequency independent
Channel space: 12.5/25KHz
Configurable multi-channels
Sensitivity: -122dBm
Output power: +27/30dBm
38 CTCSS codes
6 volume levels
8 squelch levels
UART interface
Temperature: -20°C ~+60°C
TX current: 450/750mA
Supply voltage: 3.3~4.5V
Applications
Portable walkie-talkie
Outdoor sports products
Audio monitor system
Building security system
DESCRIPTION
DRA808M is a type of compact wireless voice transceiver module. It integrates high speed
microcontroller, high performance wireless transceiver IC, high power PA, audio process and
squelching circuits. It provides standard UART interface which users can easily configure
appropriate parameters for different applications. Users can easily construct a walkie-talkie system
by connecting microphone, audio PA and speaker.
ANT
H/L
BAT
PD
GND
H/L
PA Driver
PA ANT SW
CTC/CDC
CODE
LNA
Filter
DSP
RF Transceiver
AF D/A
AF OUT
Audio ON
AMP
MIC A/D
MIC_IN
PTT
Revision 1.11
PTT RSSI
UART
TXD RXD
Figure 1: DRA808M Functional Block
Page 1 of 7
Jun. 2014
1 page  
DRA808M
microcontrollers or other hosts. The default data format is: 8 data bits, 1 stop bit, no parity and
9600 kbps data rate. All commands in ASCII codes start with “AT” and end with <CR><LF>.
1 Handshake Command
Description: It is used to check if the module works normally. DRA808M module will send
back response information when it receives this command from the host. If the host doesn’t
receive any response from module after three times of continuously sending this command, it
will restart the module.
Format:
AT+DMOCONNECT <CR><LF>
Module response: +DMOCONNECT: 0 <CR><LF>
2 Group Setting Command
Description: This command is used to configure a group of module parameters.
Format:
AT+DMOSETGROUP=GBW,TFV,RFV,CXCSS,SQ <CR><LF>
Module response: +DMOCONNECT: X<CR><LF>
GBW: Channels space. 012.5k; 125k
TFV: Transmit frequency. Range: 400.0000~470.0000MHz
RFV: Receive frequency. Range: 400.0000~470.0000MHz. The frequency should be the times of
12.5KHz or 25KHz.
CXCSS: CTCSS value (00~38). 00 no code; 01~38 effective code
SQ:
Squelch level (0~8). 0 monitor mode which can’t be used in scanning mode.
X:
Configuration result. 0 succeeded; 1 data out of range.
Example:
Command: AT+DMOSETGROUP=0,415.1250,415.1250,12,4 <CR><LF>
Response: +DMOSETGROUP:0<CR><LF>
3. Volume Command
Description: This command is used to adjust the volume of module.
Format:
AT+DMOSETVOLUME=X <CR><LF>
Module response: + DMOSETVOLUME: X<CR><LF>
X in command: Volume range (1~6).
X in response: 0 succeeded; 1failed.
Revision 1.11
Page 5 of 7
Jun. 2014
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet DRA808M.PDF ] | |
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