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.
| Microcontroller | Kinetis KL02 |
| Core | ARM® 32-bit Cortex® -M0+CPU |
| Power Supply | 3.3 ~ 6 V (via breakout pins) |
| Flash | 32 KB |
| SRAM | 4 KB |
| Clock Speed | 48 MHz |
| Power Consumption | 18mA@Tracking, 21mA@Acquisition |
| Power Saving | Typ. 3mA@AlwaysLocateTM, 7uA@Backup
Mode, 180uA@Standby Mode |
| Channel | 22(Tracking) / 66 (Acquisition) |
| Update Rate | 1Hz(Default), up to 10Hz |
| Horizontal Position Accuracy | <2.5m CEP |
| Velocity Accuracy | <0.1m/s |
| Maximum Velocity | Max.515m/s |
| Cold/warm start with EASYTM | 215s/5s |
| Acquisition Sensitivity | -145dBm |
| Tracking Sensitivity | -163dBm |
| Operating Temperature | -40℃ to 85℃ |
| Protocols | NMEA 0183/PMTK |
| Antenna Type | Chip antenna |
| Interface | Interface with Xadow GSM+BLE through
I2C (7-bit address 0x05) |
| Dimensions | 25.37mm X 20.30mm / 1” × 0.8” |
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.
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.
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.
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:
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