WisBlock GNSS Module

What Is WisBlock RAK12501 Meshtastic GPS Module?

The RAK12501 WisBlock GNSS Location Tracker Module uses the Quectel L76K and is designed to be part of a production-ready IoT solution in a modular way. It must be combined with a WisBlock Core and a Base module to work as an LPWAN tracker device.

The RAK12501 supports a wide variety of satellite data protocols, such as GPS, GLONASS, QZSS, and BeiDou. This ensures the retrieval of precise location data. The module features exceptional performance, high sensitivity, and minimal acquisition time. A very suitable module for your low-power IoT solution needs. It works with standard protocols over UART connection to the MCU.

Why You Need WisBlock RAK12501 GNSS Module

Track your assets, devices, or outdoor sensors with high-precision GNSS using the cost-effective RAK12501 module. It’s built for Meshtastic GPS tracker projects and other LPWAN-based solutions, offering accurate location data without breaking the bank.

Why it’s useful:

• Built for budget-conscious tracking – Lower cost alternative for GNSS-enabled devices
• Fast location updates – Starts tracking in under 15 seconds
• Global satellite support – Works with GPS, GLONASS, BeiDou, Galileo, and QZSS
• Compact and efficient – Small size, low power draw, and UART-only simplicity
• Reliable performance – High sensitivity ensures strong signal even in tough environments

Key Features of WisBlock RAK12501 GNSS Module

• Uses the GNSS Module: Quectel L76K
• Supports 33 tracking channels, 99 acquisition channels, and 210 PRN channels
• Log position information to internal flash memory 
• Supports GPS, GLONASS, Galileo, BDS and QZSS satellite systems
• Serial communication to WisBlock Core support with NMEA 0183 protocol
• High sensitivity, -165 dBm @ Tracking, -148 dBm @ Acquisition 
• 1Hz update rate
• Fast acquisition times:
  • Cold Start: < 15 s
  • Warm Start: < 5 s
  • Hot Start: < 1 s
• Module Size: 10 mm x 23 mm

Key Benefits of WisBlock RAK12501 GNSS Module

Easily integrate GNSS tracking into your IoT projects with this compact and cost-effective WisBlock location tracking module.

• Lower-cost GNSS solution: Ideal for budget-sensitive tracking applications
• UART-based connectivity: Simple integration with WisBlock Core via serial protocol
• Multi-system satellite support: GPS, GLONASS, BeiDou, QZSS, and Galileo included

Use Case #1

In asset tracking deployments, fast satellite acquisition ensures you get location data without delay. The RAK12501 delivers precise positioning even in remote or low-signal environments.

Use Case #2

For Meshtastic or LPWAN-based personal trackers, this module provides reliable GNSS data with minimal power consumption, making it perfect for long-term, battery-powered devices.

Comparison Table: RAK12500 vs. RAK12501

What’s in the Box

• 1 pc. RAK12501
• 1 pc. GNSS antenna

How to Get Started with WisBlock RAK12501 GNSS Module

• RAK12501 Quick Start Guide
• RAK12501 Datasheet
• WisBlock Quick Start Guide
• WisBlock Source Code Repository(opens new window)(opens new window)
• 24-Pin Male Connector 3D File(opens new window)
• WisBlock Sensor Tutorial

Frequently Asked Questions

What is the RAK12501 GNSS Module used for?

The RAK12501 is used to track the location of devices in IoT projects. It receives satellite signals and calculates precise geographic coordinates. It’s ideal for low-power LPWAN applications like Meshtastic trackers, asset monitoring, or outdoor sensors.

Why does the RAK12501 only support UART and not I2C?

The RAK12501 is designed around the Quectel L76K module, which supports UART communication only (unlike RAK12500, which supports both UART and I2C). This simplifies the hardware interface and is sufficient for serial GNSS data exchange using NMEA 0183 protocol. Compared to I2C, UART is often easier to implement and debug for IoT GPS modules with continuous data streams.

How do I connect the RAK12501 to a WisBlock Core?

To use the RAK12501, you’ll need a WisBlock Base and a WisBlock Core.

1. Plug the RAK12501 into a slot on the WisBlock Base Board that supports UART.
2. Make sure your WisBlock Core (e.g., RAK4631 or RAK11720) is properly mounted on the base.
3. Use the UART pins defined by the WisBlock Base to read GNSS data via NMEA sentences.
4. In your firmware, set up UART communication and parse the NMEA data for position information.

How fast does the RAK12501 get a satellite fix?

The RAK12501 features very fast startup times:

• Cold start: under 15 seconds
• Warm start: under 5 seconds
• Hot start: under 1 second

This ensures you get location data quickly, even after powering down.

Can I use the RAK12501 in battery-powered projects?

Yes, the RAK12501 is built for low-power applications. It uses only 7µA in backup mode and 18–25mA during tracking or acquisition, making it a great choice for portable or long-deployment devices.