GPS module with dead reckoning for exceptional accuracy in poor signal areas.Designed by Dalymople in Australia
What is it? This module uses the worlds first GPS (GNSS) receiver with built in Untethered Dead Reckoning (UDR), the U-blox NEO-M8U. This device provides professional grade accuracy, and allows the...Read More…
This module uses the worlds first GPS (GNSS) receiver with built in Untethered Dead Reckoning (UDR), the U-blox NEO-M8U. This device provides professional grade accuracy, and allows the module to continue navigating without any GPS signal, and allows increased accuracy when signal conditions are poor.
The below image shows an example of the difference the UDR system makes during poor signal conditions;
This module breaks out the functionality of U-blox module and contains all of the passives required in order to get it operating. All of the necessary signals are broken out with solder jumpers to allow customisation of the communication protocol/s.
This board also includes a backup coin cell battery holder (no battery provided due to shipping restrictions) to store the latest navigation information. This not only reduces the time to first fix, but combined with the dead reckoning capability means that the device can start navigating immediately on power up, even in tunnels or covered car parks!
The module also contains a full USB host and will enumerate as a COM port on computers with a suitable driver (see the U-blox website for information.
The number of configuration options of the NEO-M8U is incredible! Geofencing, variable I2C address, variable update rates, etc. This module even has four communications ports: USB (which enumerates as a COM port), UART (with 3.3V TTL), I2C, and SPI.
If you are using Python I have written a package for decoding UBX messages from uBlox modules. Simply
pip install ubxtranslator and visit the github repo for more info.
NB The SPI bus shares pins with the TWI and UART.
The board comes fully assembled, however you can order the following additional extras;
A uFl to SMA (bulk head) pig tail. For connection to external antennas with SMA termination.
If you want to squeeze the most out of this module you will need a high quality antenna and the Taoglas AA.170.301111 is a great match. This antenna has some impressive stats, see the datasheet for more information.
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