The Uputronics GPS/RTC Expansion Board for Raspberry Pi provides a modern multi GNSS GPS receiver and hardware RTC with no soldering required. It can be connected to all Raspberry Pi boards with the 40-pin (2x20) header.

New version 6.3 now with Flash & USB-C header for connection to PC or Mac!

Featuring PPS (Pulse per second) output to permit the use of the board for PPS disciplined NTP servers, RAW output available from the UBlox™ GPS module and twin super caps for GPS hot start/setting retention & maintaining RTC. Flash is also fitted for retention of settings and a USB header to connect to other devices is provided.

This board retains backwards compatibility with previous-generation Uputronics Pi GPS boards.

With its features and ease of installation, we believe this is the ultimate GPS / RTC HAT for the Raspberry Pi!

We also have a great case available for the Raspberry Pi 4 and GPS HAT combination, and you'll probably need an external antenna to get going!

Video

GPS Specifications

• 72-channel u-blox™ M8 engine
• Up to 3 concurrent GNSS (BeiDou, Galileo, GLONASS, GPS/QZSS)
• Default GNSS: GPS/GLONASS.
• -167dBm Navigation Sensitivity
• 10Hz navigation rate in multi GNSS mode, 18Hz in GPS only
• RAW Output available via UBX-RXM-RAWX Message
• 3V supplied to antenna port to power active antenna
• Antenna requirements: Active 3V Ceramic Patch
• No EEPROM settings must be sent at power-up or saved to battery-backed RAM.
• Default baud rate: 9600bps
• I2C Bus (Address 0x42)
• Robust SMA antenna connection.

For full documentation please consult the u-blox 8/u-blox M8 receiver description including protocol specification document (UBX-13003221) linked here.

RTC Specifications

• Micro Crystal RV-3028-C7 Real-Time Clock Module
• Factory calibrated ±1 ppm @ 25°C
• I2C Bus (Address 0x52)
• Built-in kernel compatibility
• Provides year, month, date, weekday, hours, minutes and seconds

Board Specifications

Thermal vents for compatibility with PoE HAT.
Robust SMA antenna connection.
USB-C Header for connection to anything that supports USB to serial (USB cable not supplied).
High-quality German 4 layer PCB.
High-quality Samtec headers (may not be compatible with cheaper headers and connectors)
Datasheet

Package Contents

1 x GPS/RTC Expansion Board for Raspberry Pi
4 x 11mm standoffs with 8x M2.5 Screws
1 x Samtec Header with 4.93mm tails

USB cable not included but available here

Pin Mapping

Pin	Raspberry Pi Name/Function	HAB-GPSPI+-ASSY
01	3.3V	3.3V
02/04	5V	5V (for super caps)
03	GPIO2 (SDA1, I2C)	GPS/RTC SDA
05	GPIO3 (SCL1, I2C)	GPS/RTC SCL
08	GPIO14 (TXD0)	GPS Serial RXD
10	GPSIO15 (RXD0)	GPS Serial TXD
12	GPIO18	Time Pulse

Resources

GPS HAT Datasheet and installation instructions
u-BLOX M8 Receiver Specification
Entry on pinout.xyz

3D Printable Case!

Uputronics has designed a case for use when not connected to the Raspberry Pi which you can 3D print at home!

Download Case STL Files / Fusion 360 files https://a360.co/3DUKeOY & https://a360.co/3yNuvh7 (Note requires 4x M3 x 8mm Countersunk Screws e.g ACCU SSK-M3-8-A2)

Please note the 3D Printed Case does NOT fit the Raspberry Pi inside - it's just for casing the board when not connected to a Pi.

Uputronics Products

Price

Collections

GPS/RTC Expansion Board for Raspberry Pi

ADS-B 1090MHz Filtered Preamplifier

uBLOX MAX-M8C Pico Breakout with Chip Antenna

uBLOX MAX-M10S Breakout for Active Antennas

LoRa™ Expansion Board for Raspberry Pi

LoRa Expansion Board for Raspberry Pi Zero

162MHz AIS Filtered Preamplifier

868MHz Filtered Preamplifier for LoRa, FLARM and ISM

868/915MHz Filtered Preamplifier with Transmit Bypass

LoRa Expansion Board for Raspberry Pi