Raspbian - Where are the WiFi config settings stored? - Raspberry Pi Beta - Stack Exchange. If you are talking about NetworkManager settings, they are in:
User Wiki. Raspberry Pi Thin Client project. Raspberry Pi Home Server. USB RFID + Python + Pub-Sub (MQTT) Now that we've got an RFID reader and pub-sub client working separately, it's time to combine the two functions to achieve the end result.
The following code does exactly that. Here's how it works: - When the script starts the 'open_reader()' function is called which opens the card reader or exits the script upon failure. - Displays card information - Connects to the MQTT server of quits upon failure. - Begins the main loop - The listen_card(card, interval) function starts a loop that checks a card is sitting on the reader. Documentation - RFID/NFC 13.56 MHz shield for Raspberry Pi tutorial. Tutorial Index Introduction RFID (Radio Frequency Identification) is a technology that uses electromagnetic fields to identify objects in a contactless way; it is also called proximity identification.
There are 2 elements in RFID communications: the RFID module (or reader/writer device) and an RFID card (or tag). Near Field Communication - Physical Computing with Raspberry Pi. Difficulty: advanced This tutorial will have you make a coil for NFC and connect it up to your Pi.
It will then teach you how to send and receive messages through your coil to give your Pis/robots a new way to communicate. You will probably also want to find another person doing this tutorial or a spare robot so you can test both sending and receiving messages. NFC is a simple form of wireless communication. On the sending side we have a coil of wire connected through a transistor/OP-AMP so that we can push large amounts of current through it. So with a coil connected either side it means that we can send and detect 64 KHz signals. This leaves us with a few extra choices to make, the first of these is to choose a clock rate for our data. Next we have to choose the protocol for data itself. First you’ll need to make the coil.
Wind you coil around the holder for your robot; about 30 turns should be sufficient. Open up a Python console (as root since we’re using GPIO). sudo python. RPi Projects. Back to the Hub.
Community Pages: Tutorials - a list of tutorials. Learn by doing. Adafruit's Raspberry Pi Lesson 4. GPIO Setup. The diagram below show the pins on the GPIO connector for a Raspberry Pi Version 1 (which is what existed when this tutorial was released) Version 2 has pin 27 replacing pin 21 but it otherwise the same As well as supplying power (GND, 3.3V and 5V) all the GPIO pins can be used as either digital inputs or outputs.
The pins labelled SCL and SDA can be used for I2C. The pins labelled MOSI, MISO and SCKL can be used to connect to high speed SPI devices. All the pins have 3.3V logic levels and are not 5V-safe so the output levels are 0-3.3V and the inputs should not be higher than 3.3V. Getting GPS to work on a Raspberry PI « Peter Mount's Blog. One of the tasks I want to use a Raspberry PI for is to take over the duties of an existing ITX based linux box running my weather station.
Now in theory that should be pretty simple as the current setup uses pywws to connect to the station and as that’s written in python it should work. PN532 Breakout Board. Adafruit offers a NFC breakout board which is also packaged as a full kit including a mbed & other parts to get you started.
Wiring it up¶ First of all pinheads need to be soldered on the board's main connector as well as on the two jumpers' location. The board's NFC controller (PN532) can either be configured for serial, I2C or SPI communication. The stack is currently configured to use SPI so the jumpers need to be configured accordingly: SEL0 off and SEL1 on. Now the relevant pins must be connected to the mbed. Test¶ This program demonstrates how to transfer data between a phone application and your mbed. The default pin mapping for this program is the following but you can change it in the MuNFC constructor's parameters.
Why not use it as a VPN server for tunneling your internet through when travelling? This could, for example, help you ensure a secure browsing experience when you’re on a sketchy public wifi network. Or perhaps you’re considering moving to another country for a couple months. Just find a friend or family member who is willing to let you mooch off their internet from time to time, and plug your Raspberry Pi into their network while you’re away. This will give you an American IP address for utilizing all those US only services while you’re abroad. Index of /mirror/raspbian/raspbian/pool/main/o/ocsinventory-server.