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UART Serial Module with AXSEM AX5043 Chip

RF Module base on AX5043 RF Chip with UART serial communication, -126dBm receiving sensitivity
  • DL-RTA5043M
  • 433M
  • AX5043
  • -20~20dBm
  • 2.1 - 5.5VDC
  • -121dBm
  • 1800m
  • 18*33*2

UART Serial Communication Transparent Transmission RF Module with AXSEM AX5043 Chip

DL-RTA5043M is a 50mW narrowband transmission (power centralized) wireless data transmission module based on AX5043 RF chip from Swiss AXSEM. It works in 407-450MHz ISM band and uses serial port for data transmission, which lowers the threshold of wireless application.

Narrow-band transmission has the advantages of concentrated power density, long transmission distance and strong anti-jamming ability, and greatly increases transmission distance compared with other similar products at the same power. This module can configure FEC forward error correction algorithm, which has high encoding efficiency and strong error correction ability. It can actively correct the jammed packets in case of sudden interference, greatly improving the reliability and transmission distance.

This UART serial module has data encryption and compression capabilities. The transmit data in the air is random but with rigorous encryption and decryption, which makes data interception meaningless.

The data compression function has the probability to reduce the transmission time, reduce the probability of interference, and improve the reliability and transmission efficiency. This RF module can operate in a wide voltage range of 2.1 - 5.5V to meet the needs of battery power supply. The module has four working modes, can switch freely during operation, consumes only tens of microamperes of current in power-saving mode, and is ideal for ultra-low power system and sensor applications.


● Transmission distance: 2100m

● Multiple baud rates can be configured at will

● Receiving Sensitivity: -126dBm

● Low Receive Power Consumption (Min. 2uA)

● Four working modes

● Sleeping current only 1.7uA

● Wake on radio function

● 256 channels frequency: 407 - 450M

● Double 512Bytes Ring Buffer

● Multiple power levels (maximum 50mW)

● Encryption algorithm + FEC error correction function

● Configurable 65536 address (easy to group)

● Built-in watchdog, never crashes

Download Center

DL-RTA5043M Specification V1.0 do

Technical Parameter

Serial number parameter name Parameter value details
1 Module size 18.3 * 32.3mm (without antenna)
2 Place of origin  All imported components, origin: Japan, the United States, Germany
3 Production Process SMT, wireless products must adopt SMT to ensure batch consistency and reliability
4 Interface type 1*7*2.54mm,Universal boards and DuPont lines are available
5 Frequency range 407 - 450MHz (A total of 255 channels, 433±5MHz recommended,factory default 433.0MHz)
6 Power Supply  2.1 – 5.5VDC
7 Communication leve Max. 5.2V, it is suggested that the difference between supply 
8 Measured distance about 2100m (Test conditions: clear, open, maximum power,antenna gain 5dBi, height greater than 2m, 1.2k AIUR)
9 Receive sensitivity Max. 17dBm (about 50mW). 8 levels adjustable (0-7), each level increases or decreases by 3dBm

Air transmission rate

3 levels adjustable (10, 20, 40Kbps)

11 Sleep current 1.7uA (M1 = 1, M0 = 1)
12 Transmission current 55mA@50mW
Receiving current 12.5mA (mode 0, mode 1); min. about 30uA (mode 2 + 2S wake-up)
14 Communication port UART Serial Port, 8N1 1200 - 115200 Total 8 Baud Rates
15 Driving Mode UART serial port can be set to push pull / pull up and drain open circuit.
16 Transmission length 512 bytes cache, data packet 43 bytes
17 Receiving length 512 bytes cache, data packet 43 bytes
18 Module address

65536 addresses can be configured (convenient for networking,supporting broadcast and fixed-point transmission)

19 RSSI support Built in intelligent processing
20 Receive sensitivity

-126dbm@1.2Kbps (receiving sensitivity has nothing to do with serial baud rate and delay time)

21 Antenna SMA Antenna / Spring Antenna
22 Working temperature -40 ~ +85℃
23 Working humidity 10% ~ 90% relative humidity, non-condensing
24 Storage temperature -40 ~ +125℃

Pins Definition

Pin number Name Pin direction Pin usage
1 M0 Input (very weak pull-up) Cooperate with M1 to determine the 4 working modes of the module, which can not be suspended
2 M1 Input (very weak pull-up) Cooperate with M0 to determine 4 working modes of the module
3 GPIO_0 Enter TTL serial input, connect to external TXD output pin. Can be configured as open-drain or pull-up, input, see parameter settings for details
4 AUX Output

TTL serial output, connect to external RXD input pin. Can be configured as open-drain or push-pull, output, see parameter settings for details



Low level, configured as push-pull output, see parameter settings for details
Positive reference of module power supply, voltage range: 2.1V-5.5VDC
Module ground



Typical application

Wireless Data Acquisition, Wireless Data Communication, Wireless Data Monitoring and Transmission, Wireless Voice/Audio Transmission, Wireless Sensoring; Wireless Remote Control System; Wireless Game Controller, Remote Control Toys; Wireless Keyboard, Wireless Mouse; Wireless remote control for electronic consumer products; Wireless Alarm & Security Control System; Wireless Sensor Networking, Automatic Data Collection; Industrial Remote Control, Intelligent Control System, Smart Home, Home Automation, Home Appliance Control, Building and Residential (smart home) Control, Smart City, Logistics Tracking, Warehouse Patrols, RFID (radio frequency identification); Telemetry, Automatic (Water, Electricity, Gas) Meter Reading system; Remote LED, Remote Curtain; Remote control that supports radio frequency (RF) technology

Product Tags

RF module, Wireless data transmission, RF Transmitter, RF Receiver, RF Transmit module, RF Receive module, Wireless Transceiver Module, UART Serial Module, Serial Communication Module, Transparent transmission module, RF module with UART