Ling-TR6 433 MHz Spread-Spectrum Wireless UART Module

Ling-TR6 module photographed against a centimeter scale
MOQ 10US$6.90per module
In stock3,000modules available
Reference rangeApprox. 4 km*0.6 kbps · open LOS
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Typical applications

For low-rate UART links that need more range.

Use Ling-TR6 where a complete system can operate with half-duplex communication and an external antenna matched to the target band.

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Wireless UART

Exchange serial data between two UART TTL endpoints without a cable.

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Data acquisition

Transfer low-rate sensor, meter and terminal data to a controller.

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Industrial control

Support remote control, status feedback and field-device monitoring.

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Mobile equipment

Use in robot and mobile-device links with moderate real-time requirements.

System operation

Two UART endpoints. One long-range wireless bridge.

Both modules must use matching Net ID, RF channel, bandwidth, spreading factor, coding rate and UART communication parameters.

UART device AMCU or serial equipmentLing-TR6
433 MHz RF link
half duplex
UART device BMCU or serial equipmentLing-TR6

Link behavior: The module automatically switches between transmit and receive. Use polling, request-response, or another application mechanism that prevents simultaneous bidirectional transmission.

Operating band423.92–443.92 MHz
Default frequency433.92 MHz
InterfaceUART TTL
Supply2.0–3.6 V
Receiver sensitivity−143 dBm
RF channels0–40
DirectionHalf duplex
Reference rangeApprox. 4 km*

Application boundaries

Validate the complete RF link.

Reference range is not a guaranteed installed-system range. Antenna choice, enclosure, power supply, site conditions and interference all matter.

Good starting fit

✓ Both endpoints use compatible UART TTL logic.

✓ The application supports half-duplex exchange.

✓ Both ends share matching RF and UART parameters.

✓ A 50 Ω antenna is matched to the target band.

Check carefully

! Confirm host IO levels against the module supply.

! Keep the antenna path clear of metal and large copper areas.

! Verify VCC stability during transmit current peaks.

! Test the final enclosure and installation environment.

* Range condition: Approx. 4 km is a reference line-of-sight value at 0.6 kbps in an open, interference-free environment. Verify the complete product in its intended installation.

Technical specifications

Confirmed selection data for the 433 MHz version.

The released Ling-TR6 Datasheet V1.8 remains the authority for final circuit, PCB and antenna decisions.

Operating voltage2.0–3.6 V · typical 3.3 V
Operating band423.92–443.92 MHz
RF channels0–40 · default channel 20
CommunicationSpread spectrum · UART transparent transmission · half duplex
UART baud rate600–115200 bps · default 9600 bps
Receiver sensitivity−143 dBm typical
Transmit power1–22 dBm configurable · default maximum
Transmit current76 mA typical at 22 dBm
Receive / sleep current9 mA / 6 µA typical
Bandwidth62.5 / 125 / 250 / 500 kHz
Spreading factorSF5–SF12
Operating temperature−30 to +80 °C
AntennaExternal 50 Ω ANT · TF45 recommended
Dimensions16.10 × 25.90 mm · 2.00 mm pitch
Ling-TR6 front view

Pin assignment

Seven connections

VCC
2.0–3.6 V positive supply; 3.3 V typical.
RXD
Module data input. Connect to MCU TXD; UART TTL level.
TXD
Module data output. Connect to MCU RXD; UART TTL level.
SET
Low: configuration mode. High or floating: communication mode.
CS
Low: active. High or floating: sleep.
GND
Common ground with the MCU or serial device.
ANT
External 50 Ω antenna interface; match it to the target band.

Operating modes

Three defined states

  1. Comm. ModeCS low; SET high or floating. Uses the configured communication baud rate.
  2. Config. ModeCS low; SET low. Fixed at 9600 bps, 8N1.
  3. Sleep ModeCS high or floating; wireless communication is unavailable.

Sample evaluation

Prove the link before design-in.

Separate serial, RF, antenna and enclosure effects so the team can diagnose the correct layer.

  1. 1

    Build the bench link

    Use two modules and a UART test DEMO with the factory-default parameters.

  2. 2

    Confirm connections

    Cross TXD/RXD, share GND, keep CS low, and keep SET high or floating.

  3. 3

    Match parameters

    Confirm Net ID, RF channel, bandwidth, spreading factor, coding rate and UART baud rate at both ends.

  4. 4

    Validate the final product

    Test the antenna, enclosure, installation environment and application protocol before production.

Technical downloads

Files for evaluation and design-in.

Can two modules communicate with factory defaults?

Yes. A two-module communication test can use the factory-default parameters when the circuit is connected correctly.

What must match at both ends?

Net ID, RF channel, bandwidth, spreading factor, coding rate and UART communication parameters must match.

Is Ling-TR6 full duplex?

No. The wireless link is half-duplex. Use polling or request-response to avoid simultaneous bidirectional transmission.

Which antenna should I use?

Use an external 50 Ω antenna matched to the target frequency band; TF45 is recommended in the released datasheet.

Purchase options

Start with modules or a development kit.

Module

Ling-TR6 · 433 MHz

SKU: Ling-TR6-433_V2.0_S1.02 · Stock: 3,000

US$6.90MOQ 10 · per module

Minimum online purchase quantity: 10 modules.

Development kit

Start testing faster

US$89 / set

  • 10 Ling-TR6 modules
  • 1 test demo
  • Free shipping

SKU: SET-Ling-TR6-433_V2.0_S1.02 · Stock: 200 sets

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