Wireless UART communication
Transfer ASCII or HEX data between two UART TTL endpoints without a signal cable.
Ling-TR5mini-T 2.4 GHz Wireless UART Transceiver
10–100 · MOQ 10US$2.50per module
101–500US$2.20per module
501+ · Volume orderRequest quoteFor production quantities
Typical applications
Choose it for a short-range UART link.
Use the module where two endpoints exchange serial data and the system can operate with half-duplex, request-response communication.
Data acquisition
Return sampled device data to a nearby controller over a short-range wireless link.
Industrial and remote control
Exchange command and response data for industrial control, remote-control, or robot-control products.
Embedded devices
Add a compact SMD wireless link to smart-home appliances and other embedded equipment.
System operation
Two UART endpoints. One wireless bridge.
Modules at both ends must use matching Net ID, RF channel, UART baud rate, and other communication parameters.
Link behavior: The module automatically switches between transmit and receive. Use master-slave polling, request-response, or another mechanism that prevents simultaneous bidirectional transmission.
Frequency2400–2527 MHz
ModulationGFSK
InterfaceUART TTL
Supply2.2–3.6 V
Air rate250 kbps
Channels128
DirectionHalf duplex
RangeApprox. 50 m*
Application boundaries
Validate the complete link.
The module simplifies short-range embedded links, but final performance depends on the complete product and installation.
Good starting fit
✓ Both endpoints use compatible UART TTL logic.
✓ The application supports half-duplex exchange.
✓ Both ends can share matching Net ID, RF channel, and UART settings.
✓ The finished enclosure can be tested.
Check carefully
! Do not connect 5 V UART logic directly.
! Confirm power-supply stability at the module pins.
! Keep the integrated antenna area clear.
! Open-space range is not installed-system range.
* Range condition: Approx. 50 m is a reference value for open line-of-sight conditions. Actual distance depends on the antenna, power supply, enclosure, installation, and interference.
Technical specifications
Confirmed selection data.
The released datasheet remains the authority for final circuit and PCB decisions.
Operating voltage2.2-3.6 V · typical 3.3 V
Operating band2400-2527 MHz
RF channels128 · channel range 0-127
Default frequency2483 MHz · channel 0x53
ModulationGFSK
RF air data rate250 kbps
Communication distanceApprox. 50 m · open line of sight
Receiver sensitivity-88 dBm typical
Transmit power-8 to 10 dBm · 7 levels
Transmit current10.8 mA at 0 dBm
Receive current7.2 mA
Sleep current6 uA · communication unavailable
UART baud rate600 / 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 115200 bps
Configuration-mode UART9600 bps, 8N1
Package typeSMD
AntennaIntegrated ceramic antenna
Module thickness3.00 mm including shield can
Pin assignment
Six host connections
- V / VCC
- 2.2-3.6 V positive supply; typical 3.3 V.
- R / RXD
- Module data input. Connect to MCU TXD; UART TTL level.
- T / TXD
- Module data output. Connect to MCU RXD; UART TTL level.
- S / SET
- Low: configuration mode. High or floating: communication mode.
- C / CS
- Low: active. High or floating: sleep.
- G / GND
- Common ground with the MCU or external serial device.
Operating modes
Three defined states
- Comm. ModeCS low; SET high or floating. Uses the configured baud rate.
- Config. ModeCS low; SET low. Fixed at 9600 bps, 8N1; blue LED remains on.
- Sleep ModeCS high or floating; SET can be in any state. Communication is unavailable.
After configuration, drive SET high and wait about 0.5 s before communication testing.
Sample evaluation
Prove the link before design-in.
Separate serial, radio and enclosure effects so the team can diagnose the correct layer.
- 1
Build the bench link
Use two modules and a UART DEMO tool with factory-default parameters.
- 2
Confirm connections
Cross TXD/RXD, share GND, keep CS low, and keep SET high or floating.
- 3
Match parameters
Confirm Net ID, RF channel, and UART baud rate at both ends.
- 4
Validate the final product
Begin with short packets, then test the application protocol, enclosure, installation, and power supply.
Technical downloads
Files for evaluation and design-in.
Datasheets, PCB files and configuration tools appear here when released.
Ling-TR5mini-T Datasheet
Footprint
Can two modules communicate with factory defaults?
Yes. Default power-on parameters can be used directly for a two-module communication test when the circuit is connected correctly.
What must match at both ends?
Net ID, RF channel, UART baud rate, and the other communication parameters must match.
Is 250 kbps the UART baud rate?
No. It is the RF air data rate. UART baud rate is a separate setting and defaults to 9600 bps.
Can RXD or TXD connect directly to 5 V UART logic?
No. Confirm logic-level compatibility against the module supply voltage and evaluate level shifting for a 5 V host.
Is the link full duplex?
No. The wireless link is half-duplex. Use polling or request-response to avoid simultaneous bidirectional transmission.
How should the 50 m value be used?
It is an approximate open-line-of-sight reference, not a guaranteed installed-system distance.
Purchase options
Start with modules or a development kit.
Module
Ling-TR5mini-T
SKU: Ling-TR5mini-T_V3.0_S3.01 · Stock: 5,000
US$2.5010–100
US$2.20101–500 · applied in cart
Online purchase quantity: 10–500 modules. Request a quote for 501 or more.
Development kit
Start testing faster
US$69 / set
- 10 modules
- 1 test demo
- Free shipping
SKU: SET-TR5mini-T · Stock: 100 sets
Volume order
501 modules or more?
Send the target quantity, delivery location and schedule for a bulk quotation.
Request bulk quote →The US$2.20 unit price is applied automatically in the cart for module quantities from 101 to 500. Quantities of 501 or more are quotation only.