Overview

This is a new generation of multi-channel embedded wireless serial communication module. Its working frequency band is 433.4 ~ 473.0MHz, total 100 channel available, each step is 400KHz. Maximum transmit power is 100mW (20dBm), receiver sensitivity is about -116dBm under baud rate 5000bps. Maximum communication distance is up to 1000 meters over open space(non-blocking).

Specification

• Voltage: 3.2V~5.5V (recommanded series with 1N4007 if power supply > 4.5V)

• Communication distance up to 1000m. (open space and set to lowest baudrate)

• Idle Current: 16mA

• Dimension: 27.8mm x 14.4mm x 4mm

• Frequency: 433.4MHz ~ 473.0MHz, 100 channels

• Default: baudrate 9600bps, Channel CH001 at 433.4MHz

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

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

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: 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200. By default is 9600.



• 3. "AT+Cxxx" - Set wireless communication channel
  Send>> "AT+C021"
  Return<< "OK+C021"

  Channel can be 001 to 127. By default, it is 001, the working frequency is 433.4MHz. Each step is 400KHz.



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

  Three modes available, FU1, FU2 and FU3. By default, it is FU3.



• 5. "AT+DEFAULT" - Restore to default setting.
  Send>> "AT+DEFAULT"
  Return<< "OK+DEFAULT"

  By default, baud rate is 9600bps; channel C001; FU3 mode.



• 6. "AT+RX" - Display Parameters Setting
  Send>> "AT+RX"
  Return<< "OK+FU3 \r\n OK+B9600 \r\n OK+C001 \r\n OK+RP +20dBm \r\b"