Overview

This is a new generation of multi-channel embedded wireless serial communication module. Its working frequency band is 434MHz, total 20 channel available. Transmit power is betweem -30dBm ~ 10dBm, receiver sensitivity is -112dBm ~ -95dBm. Maximum communication distance is up to 100 meters over open space(non-blocking).

Specification

• Voltage: 3.3V~5V

• Communication distance: 1 ~ 40 meter. (Max. 100 meter at open space)

• Idle Current: 3.4mA

• Dimension: 27.8mm x 14.4mm x 4mm

• Frequency: 434MHz, 20 channels

• Default: baudrate 9600bps, Channel CH001

• Interface: UART(TTL level), half duplex.

• 4 types of working modes - FU1(default), FU2, FU3 and FU4

Pin Definitions

• VCC : Connect to DC3.2V ~ 5.5V

• GND : Connect to ground

• RXD : Connect to MCU's Txd

• TXD : Connect to MCU's Rxd

• SET : Control pin for paramenters setting

Antenna Connection

Connection

AT Command

A. How to enter command mode

• Method 1: Power up the unit, then pull "SET" pin to 'L'.
• Method 2: Power off the unit, pull "SET" pin to ground, then power up the unit.
• *** Both methods let module go into command mode. New setting ONLY take effective after release "SET" pin to 'H' ***

B. Command

• 1. "AT" - Test Command
  Send>> "AT"
  Return<< "OK"


• 2. "AT+Bxxxx" - Set Baud Rate
  Send>> "AT+B19200"
  Return<< "OK+B19200"

  The baud rate options: 2400, 4800, 9600, 19200, 38400, 57600 and 115200. By default is 9600.



• 3. "AT+Cxxx" - Set wireless communication channel
  Send>> "AT+C020"
  Return<< "OK+C020"

  Channel can be 001 to 020. By default, it is 001.



• 4. "AT+Axxx" - Set module address
  Send>> "AT+A020"
  Return<< "OK-A020"

  Address between 000 ~ 255. By default, address is 000.



• 5. "AT+FUx" - Set Serial Communication Mode
  Send>> "AT+FU1"
  Return<< "OK+FU1"

  Four modes available, FU1(default, idle current 3.5mA), FU2(idle current 80uA), FU3(idle current 22mA) and FU4(idle current 22mA).



• 6. "AT+RESET" - Restore to default setting
  Send>> "AT+RESET"
  Return<< "RESET_OK"

  By default, baud rate is 9600bps; channel C001; address 000; FU1 mode.



• 7. "AT+SLEEP" - Set Module Into Sleep Mode
  Send>> "AT+SLEEP"
  Return<< "OK"

  When module receive this command, it will go into sleep mode after exit from the AT Command mode. No serial communication is allow during sleep mode. Module will exit from the sleep mode when the module is enter into AT Command Mode again. Current consumption is about 20uA at sleep mode.