SparkFun GNSS Flex pHAT - LG290P & IM19 IMU

SKU: GPS-29891 Brand: Sparkfun

Harness the power of Quectel's advanced GNSS technology with the SparkFun LG290P & IM19 GNSS Flex pHAT. This all-in-one module pairs the robust, quad-band...

$691.90 AUD, inc GST

$629.00 AUD, exc GST

Out of Stock

Harness the power of Quectel's advanced GNSS technology with the SparkFun LG290P & IM19 GNSS Flex pHAT. This all-in-one module pairs the robust, quad-band LG290P RTK receiver with our proven IM19 IMU, delivering centimeter-level accuracy with full tilt compensation and superior anti-jamming performance.

The GNSS Flex pHAT acts as the bridge between your Raspberry Pi and the modular SparkPNT ecosystem. It mounts securely via an extended 40-pin header and connects to the included GNSS module using standardized 2x10-pin headers, making it simple to swap modules for repairs or future upgrades.

Raspberry Pi Connectivity: Standard 40-pin GPIO header for a direct, secure connection.
Mounting Hardware Included: Comes with the necessary standoffs, screws, and an extended header for a clean, stable setup.

Multi-Constellation and Quad-Band RTK Precision

At the core of the Module on the pHAT is the Quectel LG290P, a high-precision, multi-constellation GNSS receiver. It is engineered for fast convergence times and reliable performance, even in challenging conditions. It simultaneously receives signals from the L1, L2, L5, and L6/E6 bands across all major constellations.

RTK & PPP Ready: Supports standard RTK and RTCM corrections, SBAS augmentation, and multiple PPP services (including BDS PPP-B2b, QZSS CLAS, and Galileo HAS).
Advanced Anti-Jamming: A built-in NIC anti-jamming unit provides professional-grade interference detection and mitigation, ensuring signal integrity in complex electromagnetic environments.
Reliable in Tough Scenarios: Embedded algorithms ensure dependable positioning even in challenging situations, such as dense urban canyons and deep tree cover.

Intelligent Tilt & Dead Reckoning

Paired with the LG290P is the Feyman (FMI) IM19 IMU, which combines MEMS sensor data with the GNSS RTK positioning data to provide high-precision attitude measurements. This enables advanced features, like tilt-compensated surveying and robust navigation through brief GNSS outages.

Survey-Grade Accuracy: Delivers roll and pitch measurements accurate to within 0.05 degrees.
Tilt Compensation: No more perfectly vertical survey poles! The IM19 can calculate a virtual digital level point at any tilt angle, revolutionizing field data collection.
Sensor Fusion: Offers a continuous navigation solution (Dead Reckoning) even during brief GNSS signal loss, making it ideal for urban or obstructed environments.

Seamless Integration & Connectivity

This GNSS Flex pHAT has been designed for the LG290P and IM19 to work in symbiosis. By default, the LG290P's navigation data is automatically fed to the IMU. The IM19 then outputs proprietary NMEA messages containing the fully compensated position and attitude (roll, pitch, and yaw). This default link can be easily reconfigured via onboard jumpers to suit your specific project needs.

This product requires an external antenna and a GNSS Flex carrier board. Users have a few options for connecting an external GNSS antenna to their GNSS receiver.

The GNSS Flex module has a U.FL connector for an external antenna.
For a sturdier connection, an SMA connector is available on the SparkFun GNSS Flex pHAT that is bridged to a U.FL connector. Users simply need to jumper the U.FL connectors on both the SparkPNT GNSS Flex module and SparkFun GNSS Flex pHAT with a short U.FL cable.

This pHAT also requires a Raspberry Pi (or similar single-board computer). Users can find Raspberry Pi and NVIDIA single-board computers in our catalog. By default, Sparkfun use the Raspberry Pi's primary serial bus (i.e., TX: GPIO14/Pin 8; RX: GPIO15/Pin 9) to communicate with the GNSS receiver and an alternate serial bus (i.e,. TX: GPIO04/Pin 7; RX: GPIO05/Pin 29) to communicate with the IMU of our SparkPNT GNSS Flex modules. However, users can also utilize any of the other interfaces.

*According to Quectel, support for the I²C interface is still under development and will be made available through a future firmware update.

Features & Specs

GNSS Flex pHAT:

40-pin socket for Raspberry Pi header
40-pin header for GNSS Flex modules
- Two 2x20-pin, 2mm-pitch male headers
  - Power
    - 3.3V
    - Backup power
    - USB bus detect (not a power source)
  - USB data
  - UART (x4)
  - SD card
  - I²C bus*
  - PPS signal (x2)
  - LED indicators (x2)
  - Event indicators (x2)
USB-C connector
- Interfaces directly w/ GNSS Flex Module
Antenna bridge
- U.FL connector
- SMA connector
µSD card socket
Qwiic connector
Indicator LEDs
- PWR (Red)
- PPS (Yellow)
- RTK (White)
- PVT (Blue)
Twenty-four jumpers
- Raspberry Pi GPIO isolation (x16)
- LED power isolation (x4)
- I²C pull-up resistors (x4)*

GNSS Flex Module - LG290P and IM19:

Quectel LG290P GNSS receiver
- Concurrent signal reception: 5 + QZSS
  - L1, L2, L5, E6 frequency bands
- GNSS Constellations:
  - GPS (USA)
  - GLONASS (Russia)
  - Galileo (EU)
  - BDS (China)
  - QZSS (Japan)
  - NavIC (India)
- SBAS Systems:
  - WAAS (USA)
  - SDCM (Russia)
  - EGNOS (EU)
  - BDSBAS (China)
  - MSAS (Japan)
  - GAGAN (India)
- Built-in NIC anti-jamming unit
IM19 Inertial Measurement Unit
Two 2x20-pin, 2mm-pitch female headers
- 40-pin socket for GNSS Flex system
  - Power
    - 3.3V
    - Backup power
    - USB bus detect (not a power source)
  - UART (x4)
  - I²C bus*
  - PPS signal (x1)
  - LED indicators (x1)
  - Event indicators (x1)
U.FL Connector:
- GNSS Antenna (Active, Multi-band)

Flex Module Interfaces:

I²C: LG290P I2C (SDA and SCL)*
Flex COM1: LG290P UART1 (TX and RX only)
Flex COM2: LG290P UART2 (TX and RX only)
Flex COM3: IM19 UART1 (TX and RX only)
Flex COM4: IM19 UART2
PPS1: LG290P PPS
PPS2: N/C
EVENTA: LG290P EVENT
EVENTB: N/C
RTK LED: LG290P RTK_STAT
PVT LED: N/C

LG290P General Features:

High-precision GNSS module
Electrical Characteristics:
- Supply Voltage: 3.15–3.45V
- Current Consumption:
  - Normal Operation:
    - 91mA (300.3mW) (Acquisition)
    - 91mA (300.3mW) (Tracking)
  - Power Saving Mode:
    - 12µA (39.6mW) (Backup Mode)
GNSS Frequency Bands:
- GPS: L1 C/A, L1C, L5, L2C
- GLONASS: L1, L2
- Galileo: E1, E5a, E5b, E6
- BDS: B1I, B1C, B2a, B2b, B2I, B3I
- QZSS: L1 C/A, L1C, L5, L2C
- NavIC: L5
- SBAS: L1 C/A
- L-band PPP:
  - PPP: B2b
  - QZSS: L6
  - Galileo HAS: E6
Tracking Channels: 1040
Horizontal Position Accuracy:
- Autonomous: 0.7m
- RTK: 0.8cm + 1ppm
Vertical Accuracy:
- Autonomous: 2.5m
- RTK: 1.5cm + 1ppm
Velocity Accuracy Without Aid: 0.03m/s
Accuracy of 1PPS Signal: 5ns (RMS)
RTK Convergence Time: 5s
Time to First Fix (without AGNSS):
- Cold Start: 28s
- Warm Start: 28s
- Hot Start: 1.7s
Sensitivity:
- Acquisition: -146dBm
- Tracking: -160dBm
- Reacquisition: -155dBm
Dynamic Performance:
- Maximum Altitude: 10000m
- Maximum Velocity: 490m/s
- Maximum Acceleration: 4g
Update Rate:
- Default: 10Hz
- Max: 20Hz
Antenna Interface:
- External active antenna
- Power Supply: External or Internal
Interfaces
- UART (x2)
  - Baud Rate: 9600–3000000bps
  - Default: 460800bps
  - Protocol: NMEA 0183/RTCM 3.x
  - SPI* (x1)
  - I²C* (x1)
Operating temperature: -40°C to +85°C
Footprint: 12.2mm × 16mm × 2.6mm
Weight: ~0.9g

IM19 General Features:

Operating Range:
- Accelerometer: ±8g
- Gyroscope: ±1000°/s -Accuracy:
- Accelerometer Bias: ±5mg
- Gyroscope Bias Accuracy: ±0.2°/s
  - Roll/Pitch: ±0.025° (1s)
  - Heading: ±0.25° (1s)
- RTK: + 0.3mm/tilt°, with 200cm straight pole (1s)
- Auto Steering Yaw: 0.25° (1s)
Initialization: ~1s
Footprint: 14.8mm x 18.4mm

*: Feature is still under development

Documentation

Design Files
- GNSS Flex pHAT
- LG290P Flex Module
Hookup Guide
- QGNSS Software (v2.0)
Component Documentation
Building a GNSS System
Qwiic Info Page
GitHub Hardware Repositories:
- GNSS Flex pHAT
- GNSS Flex Modules

WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. See link below for more information. www.P65Warnings.ca.gov

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

40 Aruma Place
Cardiff
NSW, 2285
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!

Write Your Own Review