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Xadow - GPS V2

Based on the GPS L70 module from Quectel®, the Xadow GPS v2 combines the advanced AGPS technology EASYTM (Embedded Assist System) and the AlwaysLocateTM technology to achieve high performance, ultra-low power consumption and fast positioning even at indoor signal levels. With an excellent high-sensibility receiver (-163dBm tracking) and a built-in chip antenna, the module can track up to 22 satellites on 66 channels, making it a perfect choice for navigation projects. The board also adopts the new 11 PIN Xadow connector to improve the flexibility of module connections.


  • EASY™, advanced AGPS technology without the need for external memory
  • Ultra-low power consumption in tracking mode
  • AlwaysLocate™, an intelligent controller of alternate modes
  • High sensitivity
  • Support QZSS
  • Anti-Jamming, Multi-tone Active Interference Canceller
  • Built-in chip antenna with efficiency up to 83%
  • Built-in 11 PIN Xadow Connectors for fully flexible connection with other Xadow Modules
  • Stackable, chain-able and sew-able with other Xadow Modules


MicrocontrollerKinetis KL02
CoreARM® 32-bit Cortex® -M0+CPU
Power Supply3.3 ~ 6 V (via breakout pins)
Flash32 KB
Clock Speed48 MHz
Power Consumption18mA@Tracking, 21mA@Acquisition
Power SavingTyp. 3mA@AlwaysLocateTM, 7uA@Backup /Mode, 180uA@Standby Mode
Channel22(Tracking) / 66 (Acquisition)
Update Rate1Hz(Default), up to 10Hz
Horizontal Position Accuracy<2.5m CEP
Velocity Accuracy<0.1m/s
Maximum VelocityMax.515m/s
Cold/warm start with EASYTM215s/5s
Acquisition Sensitivity-145dBm
Tracking Sensitivity-163dBm
Operating Temperature-40℃ to 85℃
Protocols NMEA0183/PMTK
Antenna TypeChip antenna
InterfaceInterface with Xadow GSM+BLE through / I2C (7-bit address 0x05)
Dimensions25.37mm X 20.30mm / 1” × 0.8”

Hardware Overview

About Global Positioning System (GPS)

The Global Positioning System (GPS) is a space-based navigation system that provides real-time and all-weather geographic position, altitude, travelling speed and time information anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It was formerly used only by military projects, and now it is freely accessible to anyone with a GPS receiver. The typical applications of GPS cover automobile navigation, time transfer, traffic signal timing, anti-theft and tracking devices, etc.

Rephone Community

We’ve been looking for a better place where our backers (RePhone Users) can sit together, warmly and comfortably, have conversations about RePhone, discuss technical problems, share ideas/projects, and give feedback on the modules’ development in the future. And then here we go, the RePhone Community.

Now join us in the RePhone Community! Together we seek answers, make interesting stuff, care about each other, and share our experiences.

Frequently Asked Questions

Some frequently asked questions in RePhone Community are collected and answered to the topic "Frequently Asked Questions of RePhone (FAQ)" , the topic will be kept updating whenever a new FAQ comes out.

Schematic Online Viewer


We will be keep updating the source code on our github page:

The schematic diagram of Xadow GPS v2 is provided in the following link:

When you find the GPS values are a bit far from your actual location, you might need to burn new firmware to Xadow GPS V2:

Check more info about the GPS L70 and the chip antenna:

Tech Support & Product Discussion

Thank you for choosing our products! We are here to provide you with different support to ensure that your experience with our products is as smooth as possible. We offer several communication channels to cater to different preferences and needs.

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