All entries by this author

Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – XBee serial data transmission

Feb 2nd, 2017 | By

With an XBee module different network topologies could be setup. I only use a direct connection between two XBee modules for my differential GPS setup. This connection mode is pre-configured and works out of the box without any configuration from your side. It is possible to configure the for example the network name. This is

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – configuration RTKLIB mobile unit

Feb 1st, 2017 | By

The previous post described how to setup the base unit and how the base unit transmit the GPS data. Now it is time to setup the mobile unit which is a part of the robot. The main difference between the base unit and the mobile unit is, that the mobile unit receives the GPS data

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Big Rob – motor driver BTS7960B

Jan 12th, 2017 | By
Big Rob BTS7960B Motor Driver 43A H-Bridge wired

First I tried a small H-Bridge with 2.5 A to supply the DC motors with energy. But this type of motor driver was too small at that point the robot tried to turn on spot the motor driver burned out. Then I bought an upgrade for my Big Rob and now I am able to

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Big Rob – power train

Jan 10th, 2017 | By
Custom-Build-Robots-Big-Rob details

This article describes the components I build by myself or I bought for the power train. The power train are all components the robot needs to mount the big buggy tires and to get the tires spin. The DC gear motors are very strong and that’s the reason why the power train has to be

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Big Rob – A Raspberry Pi powered robot

Jan 3rd, 2017 | By
Big Rob front view

Big Rob is the latest robot I designed for off-road activities. The robot will be equipped with the latest technology like a precise navigation with the differential GPS architecture I built up. You will find more details about the differential GPS setup here. The big buggy tiers enable the robot to drive off road and not to

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – configuration RTKLIB base station

Jan 3rd, 2017 | By

In the previous article described how to install the software for the RasPiGNSS module. After installing the software a short check was performed that the Raspberry Pi together with the RasPiGNSS GPS receiver is working in general. This article describes how the base stations for the precise GPS positioning setup has to be configured. The

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – software installation

Dec 28th, 2016 | By

This chapter explains which software needs to be installed on your Raspbian installation to get the RasPiGNSS Aldebaran module which should now be mounted on top of your Raspberry Pi working. For this explanation I will use Raspbian as operation system. I am using the Raspbian version “2016-09-23-raspbian-jessie.img“. From my experiences I would suggest that

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – GPS antenna setup

Dec 25th, 2016 | By

For the installation of mine differential GPS solution with two RasPiGNSS Aldebaran modules two special GPS antennas are needed. The antennas are no classic GPS mousse with a USB connector. This antennas are special receiver modules with which only a GPS signal could be received. In each case for the base station and for the

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – theoretical setup

Dec 25th, 2016 | By

With this post I will explain how a theoretical setup of a precise GNSS positioning architecture could look like. One essential part of the setup is the GPS base station. The base station knows her own position to less than a few centimeters exact. The mobile unit respectively the robot car is also equipped with

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – introduction

Dec 23rd, 2016 | By

A few years ago I started building robot cars which could drive in my living room or outdoors. Some of the vehicles are equipped with a standard USB GPS mouse. But I was again and again disappointed how inaccurate the received GPS position from an USB GPS mouse is. The accuracy of the position received

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