Ling-TR2 2.4 GHz Wireless UART Module

Ling-TR2 module photographed against a centimeter scale
MOQ 100US$2.50per module
In stock3,485modules available
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Typical applications

For configurable embedded UART links.

Connect controller, sensor, meter and equipment UART data where the system can use half-duplex communication.

↔

Remote control

Transfer commands and status data without a signal cable.

⌁

Data acquisition

Connect low-rate sensor, meter and terminal data.

⌂

Smart devices

Add a configurable wireless UART link to embedded products.

□

Industrial control

Support local control and status links with suitable timing.

System operation

Two UART endpoints. One wireless bridge.

Both modules must use matching Net ID, RF channel and UART communication parameters.

UART device AMCU or serial equipmentLing-TR2
↔2.4 GHz RF link
half duplex
UART device BMCU or serial equipmentLing-TR2

Link behavior: The module uses half-duplex communication. Use polling, request-response, or another application mechanism that prevents simultaneous bidirectional transmission.

Frequency2.4 GHz
ModulationGFSK
InterfaceUART TTL
Supply2.2–3.6 V
Air rate1 Mbps
Channels100
DirectionHalf duplex
RangeApprox. 100 m*

Application boundaries

Validate the complete link.

Final performance depends on the complete product, antenna, installation and interference environment.

Good starting fit

✓ Both endpoints use compatible UART TTL logic.

✓ The application supports half-duplex exchange.

✓ Net ID, RF channel and UART settings match.

Check carefully

! Confirm UART logic levels against the module supply voltage.

! Use a matched 2.4 GHz external antenna.

! Test the final enclosure and installation.

* Range condition: Approx. 100 m is a reference value for open line-of-sight conditions. Actual distance depends on the antenna, power supply, structure, and on-site interference.

Technical specifications

Confirmed selection data for Ling-TR2.

The released Ling-TR2 Datasheet V3.7 remains the authority for circuit, PCB and antenna decisions.

Operating voltage2.2–3.6 V · typical 3.3 V
Default frequency2.45 GHz
RF channels100
CommunicationGFSK · UART transparent transmission · half duplex
UART baud rate600–38400 bps · default 9600 bps
RF air data rate1 Mbps
Receiver sensitivity−95 dBm typical
Maximum output power12 dBm typical
Transmit / receive current40 mA / 27 mA typical
Sleep current9.5 µA typical
AntennaExternal 2.4 GHz matched antenna
PackageSMD
Ling-TR2 front view

Pin assignment

Seven connections

VCC
2.2–3.6 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 antenna interface for a matched 2.4 GHz antenna.

Operating modes

Three defined states

  1. Communication modeCS low; SET high or floating. Transparent transmission using configured parameters.
  2. Configuration modeCS low; SET low. Fixed at 9600 bps, 8N1 for parameter read/write.
  3. Sleep modeCS high or floating; wireless communication is unavailable.

Sample evaluation

Prove the link before design-in.

Start with the factory parameters and a short, controlled bench link.

  1. 1

    Build the bench link

    Use two modules and a UART test setup.

  2. 2

    Confirm connections

    Cross TXD/RXD, share GND, keep CS low, and select the correct SET state.

  3. 3

    Match parameters

    Confirm Net ID, RF channel and UART baud rate at both ends.

  4. 4

    Validate the final product

    Test antenna, power supply, enclosure and installation orientation.

Downloads

Technical files for evaluation and design-in.

Can two modules communicate with factory defaults?

Yes. With the circuit connected correctly, a two-module communication test can use the factory-default parameters.

What must match at both ends?

Net ID, RF channel and UART communication parameters must match.

Is Ling-TR2 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 2.4 GHz matched antenna and validate final performance in the completed product.

Purchase options

Start with modules or a development kit.

Module

Ling-TR2 · 2.4 GHz

SKU: Ling-TR2_V2.09_2450_S3.0 · Stock: 3,485

US$2.50MOQ 100 · per module

Minimum online purchase quantity: 100 modules.

Development kit

Start testing faster

US$69 / set

  • 10 modules
  • 1 pair of test demos
  • Free shipping

SKU: SET-Ling-TR2_V2.09_2450_S3.0 · Stock: 200

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