Beitian BH-252Q GNSS Precision Module for FPV Racing Drone & Fixed Wing, UBX/NMEA Protocol Selectable
Beitian BH-252Q GNSS Precision Module for FPV Racing Drone & Fixed Wing, UBX/NMEA Protocol Selectable
Beitian
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Overview
Beitian BH-252Q is a GNSS precision module for FPV racing drone and fixed-wing installations, designed to output positioning data through a serial (UART/TTL) port. Please confirm whether UBX or NMEA protocol is required when purchasing; the module uses the UBX protocol by default.
For configuration help or order confirmation (protocol/model), contact support at https://rcdrone.top/ or email support@rcdrone.top.
Key Features
- Multi-satellite navigation support: GPS, GLONASS, BDS, GALILEO, IRNSS (also supports QZSS and SBAS as listed in specifications).
- Horizontal accuracy: 1.5 m CEP.
- Flash supported (built-in flash; configuration can be changed and is not lost in the event of power outage, as listed in the parameter table).
- Selectable output protocols: NMEA and UBX (UBX default per purchase note).
- Serial wiring reference: VCC/GND/TX/RX connection to USB-to-TTL adapter or microcontroller; 1PPS is shown in the wiring diagram.
Specifications
GNSS performance / electrical (parameter table)
| Chip | B1301N |
| Receiver type | GPS L1, GLONASS G1, BDS B1, GALILEO E1, QZSS L1, SBAS L1, IRNSS |
| Default position system | GPS, GLONASS, BDS, GALILEO, IRNSS |
| Augmentation system | SBAS, QZSS |
| Channels | 120 |
| Sensitivity (Tracking) | -163 dBm |
| Sensitivity (Reacquisition) | -159 dBm |
| Sensitivity (Cold start) | -148 dBm |
| Sensitivity (Hot start) | -159 dBm |
| Horizontal position accuracy | 1.5 m CEP |
| Velocity accuracy | 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 is listed in the parameter table) |
| 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 |
| Operating temperature | -40°C ~ +85°C |
| Storage temperature | -40°C ~ +105°C |
BH-252 / BH-252P module variant table (as listed)
| Parameter | BH-252 | BH-252P |
|---|---|---|
| Chip | B1301N | B1301N |
| Default positioning mode | GPS L1, GLONASS G1, BDS B1, GALILEO E1, QZSS L1, SBAS L1, IRNSS | GPS L1, GLONASS G1, BDS B1, GALILEO E1, QZSS L1, SBAS L1, IRNSS |
| Channels | 120 | 120 |
| Sensitivity | Cold Start -148 dBm; Hot Start -159 dBm | Cold Start -148 dBm; Hot Start -159 dBm |
| Horizontal | 1.5 m CEP | 1.5 m CEP |
| Velocity | 0.1 m/s CEP | 0.1 m/s CEP |
| Cold start | 28 s | 28 s |
| Hot start | 1 s | 1 s |
| Baud rate | 9600~2000000 bps, default 115200 bps | 9600~2000000 bps, default 115200 bps |
| Level | TTL | TTL |
| Protocol | NMEA, UBX | NMEA, UBX |
| Update | 1~20 Hz, default 10 Hz | 1~20 Hz, default 10 Hz |
| FLASH | Built-in | Built-in |
| Work restrictions | High 50,000 m; Speed 500 m/s; Acceleration <4 g | High 50,000 m; Speed 500 m/s; Acceleration <4 g |
| Voltage | DC 3.6-5.5 V, typical: 5.0 V | DC 3.6-5.5 V, typical: 5.0 V |
| Current | 20 mA/5.0 V | 20 mA/5.0 V |
| Dimensions | 25*25*8.1 mm | 25*25*8 mm |
| Weight | 12 g | 13 g |
| Connector | 1.00 mm 4 pins | 1.00 mm 6 pins |
| Operating | -40°C ~ +85°C | -40°C ~ +85°C |
| Storage | -40°C ~ +105°C | -40°C ~ +105°C |
| Compass | No | Built-in QMC5883P |
Data Output (NMEA-0183 content list shown)
| Get Parameters | Get Content |
|---|---|
| GGA | Time, position, number of satellites |
| GLL | Longitude, latitude, UTC time |
| GSA | GPS receiver operation mode, satellite used for positioning, DOP value, positioning status |
| GSV | Visible GPS satellite information, elevation angle, azimuth angle, signal-to-noise ratio |
| RMC | Time, date, position, speed |
| VTG | Ground speed information |
Available Model Options
- BH-182; BH-180; BH-220; BH-280; BH-357; BH-220Q; BH-182Q; BH-222Q; BH-252Q; BH-280B; BH-280U; BH-357B; BH-357U; BH-880; BH-880Q
Details
Multi-GNSS positioning with flash-backed settings helps keep configuration stable between power cycles.
A lightweight, compact footprint suits tight FPV drone stacks and fixed-wing fuselages while tracking multiple constellations.
Standard NMEA-0183 sentences make it easy to parse time, position, speed, and satellite information over UART.
Test data summarizes sensitivity and positioning performance, including 1.5 m CEP horizontal accuracy.
Clear pin wiring for VCC/GND/TX/RX plus 1PPS supports quick bench setup with a USB‑TTL adapter or direct flight controller UART.
The spec sheet and pin definition help confirm UART level, baud rate range, and the required VCC/GND/TX/RX connections.
Front/rear layout and dimensions make it easier to plan mounting and cable routing in compact airframes.
Included accessories cover basic installation: an adapter cable for wiring and 3M adhesive for mounting.
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