Raspberry Pi Temperature Sensor
In this tutorial, we will be building a circuit to connect a temperature sensor to our Raspberry Pi, and writing a program to read the sensor data. The circuit we will build is going to connect to the Raspberry Pi using the GPIO pins. GPIO stands for General Purpose Input/Output. General purpose because all they are is simple connections that can be either high or low, a binary choice. This means we can easily do things that involves binary choices, and it will still be nice and simple to understand what is going on. In this tutorial, we are going to be turning LEDs off and on, and checking whether buttons are being pressed—all very binary actions, which makes them ideally suited for GPIO pins. However, this is not all that GPIO pins can be used for. Once we have built our circuit, the next step is to write a program to read the temperature, and give it to us in a nice format. Step One: Updating the Kernel The first step is to change where our Pi updates from, by editing a text file.
GNU Radio - Tutorials - gnuradio.org
Beginner-level tutorials¶ Note that even as a GNU Radio beginner, you'll be delving into the realm of software defined radio, which is a complex field. Core concepts of GNU Radio applications - A must-read for everyoneWritePythonApplications - A tutorial on how to develop Python GNU Radio applications. Some DSP and programming background required.QTGUI Tutorial - A tutorial on how to develop Python GNU Radio applications. Some DSP and programming background required.Tom Rondeau's gr-tutorial - Some tutorials from the boss himself.Simulations - A tutorial on how to use GNU Radio without hardware to verify performance and simulate RF conditions. Tutorials on developing with and for GNU Radio¶ Writing GNU Radio code¶ Advanced Development¶ Development tools¶ Outdated tutorials¶ Kept here for archeological reasons only. Alonso's Examples: alonsos-examples.zip Non-GNU Radio-specific tutorials hosted on this wiki¶ All about decibels (dB) 3rd Party contributed Documentation¶ Outdated stuff: Attachments¶
RTL-SDR community on Reddit
merbanan/rtl_433
Watching planes with software-defined radio
In this post we look at how USB DVB-T hardware can be used with software-defined radio (SDR) to create a low cost aviation Mode S receiver. Modern aircraft are fitted with “Mode S” transponders that can be interrogated by air traffic control radar in order to ascertain their position and heading. Hobbyist equipment for receiving these transmissions has been available for some time and typically costs hundreds of pounds. But it's now possible to re-purpose DVB-T hardware costing around £20 to create an SDR-based receiver. gr-air-modes The SDR is constructed using the GNU Radio framework and details of how to configure this and the DVB-T hardware used can be found in a previous post. Google Earth integration The gr-air-modes application also provides Google Earth support and this can be configured with the following steps: Flight simulation and network applications Conclusion Top image: detail from Google Earth showing two aircraft and their flight paths. — Andrew Back Like this Leave a Comment
Welcome to the rtlsdr.org wiki! [rtlsdr.org wiki]
Raspberry Pi and Wireless Sensor
A few weeks ago, I blogged about at a 'shield' that plugs into the Raspberry Pi's GPIO port called the 'Slice of Pi'. This very low cost board also includes an X-Bee shaped socket into which RF modules can be plugged. The company behind the 'Slice of Pi' (Ciseco) is also behind a useful and low-cost range of RF devices. In this blog entry, I used one of their wireless sensor modules (in this case temperature) with a pair of XRF RF modems to add remote wireless temperature sensing to the Raspberry Pi using the serial connection on the GPIO pins. Here, a simple program (on the left) reads the temperature from the remote wireless sensor and displays it (in the right). Hardware Here is the Raspberry Pi, with a Slice of Pi and an XRF module all plugged together sandwich style. I plugged them together with the Pi turned off, as 'hot-swapping' makes me nervous. Software The temperature module sends the temperature as a string every 15 seconds. About the AuthorThese are my books.
Embedded Systems Outlook
The Embedded Systems Outlook highlights important technologies and methodologies making a large impact on the embedded systems market. By interacting with over 35,000 companies worldwide, National Instruments has formed strategic partnerships with many key customers and leading technology providers including Analog Devices, Intel, and Xilinx, to identify market trends and industry best practices. Download the 2013 outlook to explore the most pressing trends, opportunities, and challenges influencing today's design teams that are building embedded control and monitoring systems. Download the NI Embedded Systems Outlook 2013 Watch the webcast Reconfigurable Heterogeneous Architectures When faster CPU cores fall short, embedded system designers are combining heterogeneous processing elements to meet application needs. Democratization of Embedded System Design Total Economic Profitability The Digital Energy Revolution Embedded Vision
rtl-sdr.com - A blog about RTL-SDR and software defined radio
Wireless Temperature Sensor Project - PrivateEyePi Project
Software Now that you have your electronics built we can work on the software. Boot up your Raspberry Pi and navigate to the home directory from the command prompt. Download the rftherm.zip software by typing the following commends: At the command prompt type: Code: cd /home sudo wget -N www.privateeyepi.com/downloads/rftherm.zip The unzip command will look something like figure 3 where the three source code files are uncompressed and copied into the /home directory. Figure 3 - Unzip the three source code files As per Figure 4 edit the globals.py file in order to enter your user and password. Figure 4 - Enter your user (email address) and password To save type CTRL-X, followed by Y and then ENTER. Each RF transmitter is pre-configured with a unique sensor number. Go to www.privateeyepi.com, log in or if you are a new user click "new user" and enter your details. Figure 5 - Configure the new sensor using the unique number provided with the sensor Configure Serial Port on the RaspberryPi
