• Beitian BE-125 and BK-125 GNSS SMT timing modules shown from an angled top view
  • Beitian GNSS SMT timing module with 1PPS output shown in a promotional product graphic
  • Beitian BE-125 module front and back views with parameter details for GNSS bands
  • Beitian BE-125 module shown in an application scenario graphic for timing and positioning use
  • Beitian BE-125 series package list showing one module and one serial cable
  • Beitian BE-125 GNSS module product parameters showing size, modes, and supported frequencies
  • Beitian BK-125 GNSS module parameter sheet showing GLONASS support and frequency bands
  • Beitian BH-125 GNSS module parameter sheet showing front and back views and supported modes
  • Beitian GPS+GLONASS antenna with SMA-J interface and black antenna housing
  • Beitian BK-125 GNSS module product parameter sheet showing GPS, GLONASS, BDS, and Galileo support
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Beitian BE-125/BK-125 GNSS SMT Timing Module with 1PPS Output, GPS/BDS/Galileo, TTL/RS-232

Beitian BE-125/BK-125 GNSS SMT Timing Module with 1PPS Output, GPS/BDS/Galileo, TTL/RS-232

Beitian

$32.46 USD
$32.46 USD
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Overview

This Beitian GNSS module series is an SMT timing module with 1PPS (seconds pulse) output for synchronization and timing applications. Different selectable models support different GNSS constellations and electrical levels (TTL or RS-232), and all listed models require an external antenna.

Key Features

  • 1PPS output supported (seconds pulse)
  • Multi-mode positioning options shown: single Beidou mode; GPS/BDS/GALILEO/SBAS/QZSS; GPS/GLONASS/BDS/GALILEO/IRNSS/SBAS/QZSS
  • UART interface (TTL level shown; RS-232 versions also listed depending on model)
  • External antenna required (listed across models)
  • Antenna network notes shown: impedance matching 50 ohm; antenna VSWR < 1.6; internal antenna detection and short-circuit protection function

Specifications

Model comparison (from manufacturer tables)

Parameter BE-125 BE-125B BK-125 BD-125 (TTL) BD-125 (RS-232) BQD-125 (TTL) BQD-125B (RS-232)
Chip M10050 M10050 M9N Module MT3333 MT3333 AT6668B AT6668B
Working mode GPS L1 C/A, QZSS L1 C/A/S, BDS B1I/B1C, Galileo E1B/C, SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN GPS L1 C/A, QZSS L1 C/A/S, BDS B1I/B1C, Galileo E1B/C, SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN GPS L1 C/A, QZSS L1 C/A/S, GLONASS L1OF, BDS B1I, Galileo E1B/C, SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN GPS L1, BDS B1, QZSS L1, SBAS L1 GPS L1, BDS B1, QZSS L1, SBAS L1 GPS L1, BDS-B1I, BDS-B1C BDS-B1I, BDS-B1C
Channel N/A N/A 92 72 72 — —
Sensitivity Cold Start -148 dBm; Hot Start -160 dBm Cold Start -148 dBm; Hot Start -160 dBm Cold Start -148 dBm; Hot Start -159 dBm Cold Start -148 dBm; Hot Start -156 dBm Cold Start -148 dBm; Hot Start -156 dBm Cold Start -148 dBm; Hot Start -155 dBm Cold Start -148 dBm; Hot Start -156 dBm
Position (Horizontal) 2.0 m CEP 2.0 m CEP 1.5 m CEP 2.0 m CEP 2.0 m CEP < 2 m (CEP50) < 2 m (CEP50)
Velocity 0.05 m/s 0.05 m/s 0.05 m/s 0.1 m/s 95% (SA off) 0.1 m/s 95% (SA off) < 0.1 m/s (1 σ) < 0.1 m/s (1 σ)
1PPS time RMS 30 ns RMS 30 ns RMS 30 ns 1 us 1 us 20 ns 20 ns
Acquisition time Cold start 27 s; Hot start 1 s; Aided start 1 s Cold start 27 s; Hot start 1 s; Aided start 1 s Cold start 24 s; Hot start 2 s; Assisted start 2 s Cold Start 26 s; Warm Start 25 s; Hot Start 1 s Cold Start 26 s; Warm Start 25 s; Hot Start 1 s Cold Start < 23 s; Hot Start < 1 s; Recapture < 1 s Cold Start < 23 s; Hot Start < 1 s; Recapture < 1 s
Support rate (baud rate) 4800 bps - 921600 bps, default 115200 bps 4800 bps - 921600 bps, default 115200 bps 4800 bps - 921600 bps, default 115200 bps 4800 bps to 921600 bps, default 9600 bps 4800 bps to 921600 bps, default 9600 bps Default 115200 bps Default 115200 bps
Data level TTL RS-232 TTL TTL RS-232 TTL RS-232
Data protocol NMEA, UBX NMEA, UBX NMEA, UBX NMEA-0183 NMEA-0183 NMEA NMEA
Update rate 0.25 Hz - 18 Hz, default 1 Hz 0.25 Hz - 18 Hz, default 1 Hz 0.25 Hz - 25 Hz, default 1 Hz 1 Hz - 10 Hz, default 1 Hz 1 Hz - 10 Hz, default 1 Hz ≤ 10 Hz, default 1 Hz ≤ 10 Hz, default 1 Hz
FLASH Support Support Support Support Support Support Support
Work restrictions Altitude 80,000 m; Velocity 500 m/s; Dynamics < 4 g Altitude 80,000 m; Velocity 500 m/s; Dynamics < 4 g Altitude 80,000 m; Velocity 500 m/s; Dynamics < 4 g Altitude < 50,000 m; Velocity < 515 m/s; Acceleration < 4 g Altitude < 50,000 m; Velocity < 515 m/s; Acceleration < 4 g Altitude 18,000 m; Velocity 515 m/s Altitude 18,000 m; Velocity 515 m/s
Voltage DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V DC Voltage 3.6 V - 5.5 V, Typical: 5.0 V
Current 30 mA / 5.0 V 30 mA / 5.0 V 45 mA / 5.0 V 50 mA / 5.0 V 50 mA / 5.0 V 35 mA / 5.0 V 35 mA / 5.0 V
Dimensions 25.6 * 25.6 * 7.1 mm 25.6 * 25.6 * 7.1 mm 25.6 * 25.6 * 7.1 mm 25.6 * 25.6 * 7 mm 25.6 * 25.6 * 7 mm 25.6 * 25.6 * 7.1 mm 25.6 * 25.6 * 7.1 mm
Weight 12 g 12 g 12 g 10 g 10 g 12 g 12 g
Connector 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket 1.25 / 6P without lock, horizontal SMD socket
Antenna Need a external antenna Need a external antenna Need a external antenna Need a external antenna Need a external antenna Need a external antenna Need a external antenna

BF-125 module main performance indicators (from the shown product-parameters table)

Chip B1301Y
Receiver type GPS L1, BDS B1, GALILEO E1, QZSS L1, SBAS L1
Default position system GPS, BDS, GALILEO
Augmentation system SBAS, QZSS
Channel 100
Sensitivity (Tracking & Navigation) -163 dBm
Sensitivity (Reacquisition) -159 dBm
Sensitivity (Cold Start) -148 dBm
Sensitivity (Hot Start) -159 dBm
Accuracy (Horizontal Position) 2.0 m CEP
Accuracy (Velocity) 0.1 m/s CEP
Acquisition (Cold Start) 28 s
Acquisition (Hot Start) 1 s
AGPS Time To First Fix 1.5 s
Baud Rate 9600 - 2000000 bps, default 115200 bps, support sleep mode
Level TTL
Protocol NMEA, UBX
UBX Statement PVT, SAT
Update Rate 1 - 20 Hz (default: 10 Hz)
FLASH Support; configuration can be changed; will not be lost in the event of power outage
Work Restrictions (High) 50,000 m
Work Restrictions (Speed) 500 m/s
Work Restrictions (Gravitational Acceleration) < 4 g
Voltage DC 3.6 V - 5.5 V, typical: 5.0 V
Current 20 mA / 5.0 V
Dimension 25.6 * 25.6 * 7.1 mm
Weight 12.0 g
Connector 1.25 mm 6pins connector
Antenna Need a external antenna
Operating temperature -40 C - +85 C
Storage temperature -40 C - +105 C
TX Light Power on; blue light flashing; indicate data output
PPS Light Red light not bright when GPS not fixed; flashing when fixed

Pinout & Wiring (shown for BF-125)

PIN Name I/O Description Feature
1 1PPS O 1PPS, low level before positioning, 1 s period after positioning, high level 100 ms second pulse output The pulse can be used for synchronization or timing. Leave it unconnected if not used.
2 GND G Ground Ground
3 RST I Reset pin —
4 RX I UART communication interface, TTL level BDS data input pin
5 TX O UART communication interface, TTL level BDS data output pin
6 VCC I Main power supply, DC input DC 3.6 V - 5.5 V; 5.0 V recommended

Wiring diagrams shown include: GPS module to USB-to-TTL cable (GND, TX, RX, VCC) and GPS module to microcontroller (1PPS to IO, plus GND/TX/RX/VCC). A BOOT pin is also shown on the module side.

Applications

  • Shared bike tracking
  • Logistics tracking
  • Wearable device positioning

Package Options

A product list graphic indicates possible combinations of adapter cable + module + antenna, and notes that items included may differ by module/option. For confirmation of the exact items included with the selected variant (Model options shown: BK-125, BE-125, BE-125B, BK-125B, BN-143AJ, BD-143AJ), contact support at https://rcdrone.top/ or email support@rcdrone.top.

Details

Beitian BE-125/BK-125 GNSS timing module comparison table with 1PPS output and antenna notes

Model specs are summarized for the BE-125 series and related variants, including data level, 1PPS timing, and antenna requirements.

Beitian BE-125/BK-125 GNSS timing module with 1PPS output, TTL level, and multimode support

The module is designed for timing applications and supports selectable GNSS modes with a 1PPS seconds pulse output.

GNSS mode chart showing single Beidou, three-constellation, and four-constellation options for the module

Selectable constellation modes help match the module to different timing and positioning setups.

BE-125 GNSS timing module parameter sheet with chip details, pin definition, rear view, and size diagram

Key electrical, mechanical, and pin details are grouped together for installation and integration planning.

Wiring diagram for BE-125 GNSS module connection to USB to TTL cable and microcontroller with 1PPS

UART wiring and the 1PPS line are laid out for direct connection to a USB-to-TTL cable or controller.

Antenna performance graphic for BE-125 GNSS module with 50 ohm network, VSWR, and sky plot

A matched external antenna helps support stable reception and accurate timing output.

Product parameters table for Beitian BF-125 module with pin definition and external antenna requirement

The parameter sheet lists electrical limits, output format, operating range, and the required external antenna.

BE-125 module rear view, functional block diagram, and dimension drawing for mounting reference

Rear layout and dimensions help confirm connector placement before assembly.

Fields of application graphic showing shared bike, logistics tracking, and wearable device use cases

Typical applications include asset tracking and other compact GNSS-enabled products.

Product list showing adapter cable, Beitian BF-125 module, and external antenna kit contents

The module is pictured with the matching cable and antenna used in the complete setup.

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