Navisys GR-M02 RS232 GNSS Receiver (Industrial Grade, L1 + L5 Dual-Band, 1.5m Accuracy, 10Hz Update Rate, IPX7 Waterproof, Fully EMI Shielded, Operating Temperatures from -40°C to +85°C)

$76.95 USD

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Country of Origin: Taiwan

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The NaviSys GR-M02 (RS232 version) is a high-quality GNSS receiver designed for industrial and commercial use. It is built on Airoha’s (a subsidiary of MediaTek) single-chip dual-band AG3335 engine, featuring 135 channels and supporting both L1 and L5 dual bands.

This dual-band capability allows the GR-M02 to receive signals from both L1 and L5 band satellites, effectively canceling out errors introduced when signals pass through the ionosphere and troposphere. This results in higher accuracy compared to single-band GNSS, with the GR-M02 achieving precision within 1.5 meters.

The 135 channels enable the GR-M02 to utilize more channels for faster satellite acquisition. Smart jammer detection across GPS, GLONASS, Galileo, and BeiDou helps keep positioning reliable in challenging RF environments such as drone navigation, vehicle tracking, and security monitoring.

Despite its capability set, the GR-M02 stays compact at 40 × 45 × 18.5 mm with a slim smart antenna. It is an industrial and commercial grade receiver with IPX7 waterproofing, full EMI shielding, a wide operating range from −40°C to +85°C, ultra-low power consumption at 94 mA, and an update rate of up to 10 Hz.

RS232 interface · L1 + L5 dual-band · 135 channels · 1.5 m accuracy · Up to 10 Hz · 94 mA · IPX7 · 40 × 45 × 18.5 mm · 3.3–5 VDC

Key Features

RS232 Industrial Interface

RS232 serial output for industrial hosts
UART default baud rate: 115200 bps (N-8-1)
Supply: 3.3–5 VDC (RS232)
Typical current: 94 mA average tracking

→ Direct RS232 connection for PCs, PLCs, and industrial controllers

L1 + L5 Dual-Band Accuracy

Airoha AG3335 dual-band engine
Horizontal: 1.5 m (L1+L5)
Vertical: 2.25 m (L1+L5)
CEP, 50%, 24 hr static, −130 dBm

→ Dual-band ranging helps reduce ionospheric error vs single-band GNSS

135 Channels · Faster Acquisition

135-channel AG3335 engine
More channels for faster satellite acquisition
Concurrent multi-constellation L1 / L5 tracking

→ Quicker fixes when you power on in the field

Smart Jammer Detection

Smart jammer detection across GPS, GLONASS, Galileo, and BeiDou
Real-time monitoring of interference signals
Helps maintain reliable positioning under RF stress

→ Extra resilience for drones, vehicles, and security deployments

Up to 10 Hz Update Rate

Max. update rate: 10 Hz (default 1 Hz)
NMEA Ver. 3.01 and 4.10
Default sentences: GGA, GSA, GSV, RMC, VTG

→ Higher refresh when you need denser track points

Industrial Form Factor

40 (W) × 45 (L) × 18.5 (H) mm
IPX7 waterproof
Fully EMI shielded
Operating temperature: −40°C to +85°C

→ Built for outdoor and industrial deployment, not just lab benches

Navisys NaviViewerAh Tool

The manufacturer Navisys offers NaviViewerAh for easy configuration and diagnostics of the GR-M02 GNSS receiver. The screenshots below show satellite signal bars for L1 and L5, respectively.

Receiver Specifications

GNSS Receiver Type

135-channel Airoha AG3335 engine

L1

1602 MHz: GLONASS L1OF
1575.42 MHz: GPS & QZSS L1 C/A · SBAS L1 · QZSS L1 SAIF · Galileo E1 (E1B+E1C)
1561.098 MHz: BeiDou B1I

L5

1176.45 MHz: GPS & QZSS L5 · Galileo E5a · BeiDou B2a

Accuracy

Horizontal position	Autonomous: 1.5 m (L1+L5 dual-band) CEP, 50%, 24 hr static, −130 dBm
Vertical position	Autonomous: 2.25 m (L1+L5 dual-band) CEP, 50%, 24 hr static, −130 dBm
Velocity	<0.05 m/s (speed) · 50% @ 30 m/s
PPS time pulse	±10 ns clear sky, 1-sigma

TTFF (Time to First Fix)

Condition	Autonomous (50%, −130 dBm)
Hot start	1 s
Warm start	24 s
Cold start	24 s

Sensitivity

Acquisition	−148 dBm
Tracking	−165 dBm

Measurement Data Output

Max. update rate: 10 Hz (default 1 Hz)
NMEA output protocol: Ver. 3.01 and 4.10
UART default baud rate: 115200 bps (N-8-1)
Datum: WGS-84
Default sentences: GGA, GSA, GSV, RMC, VTG

Dynamics & Limits

Max. altitude	< 50,000 m
Max. velocity	< 500 m/s or 1,852 km/hr
Dynamics	< 4 g
SBAS	WAAS, EGNOS, MSAS, GAGAN
QZSS	SLAS (Sub-meter Level Augmentation) support in Japan only

Power

Power consumption	94 mA / average tracking (RS232, 77 SVs used in fix)
Power supply	3.3 ~ 5 VDC (RS232)

Mechanical & Environment

Dimension	40 (W) × 45 (L) × 18.5 (H) mm
Operating temperature	−40°C to +85°C
Storage temperature	−40°C to +85°C

What's in the Box

Navisys GR-M02 GNSS Receiver × 1

Product Resources

Official Documents

Downloads

This GR-M02 TTL / RS232 variant uses a serial (UART) interface rather than USB. No USB driver install is required for the receiver itself. Connect via a compatible RS-232 port or TTL/UART host, then use the tool below for configuration and diagnostics.