://www.cnblogs.com/yanxiaodi/p/4941312.html
Below are the Database classes in the system:
public class DataBase : SQLiteConnection { public static string path = Path.Combine(ApplicationData.Current.LocalFolder.Path, "atmo.db"); public DataBase() : base(new SQLitePlatformWinRT(), path) { CreateTable
INotifyPropertyChanged interface implementation
public class ViewModelBase : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyC
Linux+raspberry Pi+python* * For students to do a smart home tutorial:Using Raspberry Pi As a server, we have access to the server method, control the Raspberry Pi I/O port high and low level, I/O port on the relay (to achieve low
screenConnection Control CableThe control cable has 4 female heads that can be inserted directly onto the gpio pins of the Raspberry Pi.The logic level of the Adafruit USB control cable is 3.3V, so it is safe for Pai.In this experiment, we will supply the Raspberry Pi directly through the serial port, so do not supply the USB adapter to the small power. If you w
Then insert a dual line on the gpio4 pin of Raspberry Pi as the antenna.
UseIfconfigCommand to view your IP address and open it in the browser:Http: // Raspberry Pi IP: 8000/You can view the songs being played, and then you can add the songs you want to listen.
Turn o
If you have dense phobias, you only need to look at the bold Section of the title and font. If you have an underline, you can click it on the website.
There are many common Linux system branches in China:
1. Debian
2. RedHat
Refer:Overview of the evolution of GNU/Linux releases over the years.
At present, the Debian branch of the desktop version is better than the RedHat branch of the server, because the Raspberry
original value is 69.
# Connection! [Rasp] (http://images.cnblogs.com/cnblogs_com/hangxin1940/466697/o_rasp_gpio.png "rasp ")
This figure specifies the position of 5 V output and 3 V output in the Two-row gpio real script to specify the direction
! [Rasp] (http://images.cnblogs.com/cnblogs_com/hangxin1940/466697/o_rasp_GPIOs_gy85.png "rasp ")
This figure details the connection between the GY-85's true foot and Raspberry
For students to do a smart home tutorial: The use of Raspberry Pi as a server, we through the method of accessing the server, control the high and low level of the I/O port of the Raspberry Pi, I/O port connected on the relay (to achieve low voltage control high voltage), relay you can be arbitrarily connected to the h
Environment: Raspbian-stretch (2018-06-27)Raspberry Pi: 3 generation B Type1, Raspberry Pi equipment, need to be in the field can also have independent networking capabilities, it is necessary to use the Internet of Things module.The SIM868 communication module for micro-snow is used here, such as:2, will SIM868 insert
Yesterday made the control led, played the first, the rest of the feeling is very simple, here recordJust a couple of photos.Play the honey module only to find the law, generally this module, there will be three pins, VCC (3.3V or 5V power supply output PIN), GNC (for Gpio pin of GNC), out/(I/O) (corresponding to the gpio number of pins), if it is necessary to send information to the
Requirement
Without a network, a keyboard, or a monitor, controlling Raspberry Pi becomes a problem. I accidentally saw an article today.ArticleThat is, you can directly control the Raspberry Pi through the serial port. Give a decisive try. The effect is good. Share it with others!Pai_^ Preparation
0. PrefaceRaspberry Pi can be painless starter Linux, which controls the Raspberry Pi gpio through command and shell scripting. With this article you can familiarize yourself with multiple Linux commands and familiarize yourself with the shell scripting methods and have a basic understanding of IO redirection. I learned in the process of
Raspberry PI Series--bare metal illuminated LED lightsBackgroundRecently just bought Raspberry PI B +, configured to run the official Raspbian system, tossing a week Linux system, feel no meaning, so try to understand the bottom of the start process, through a few days of research, It is found that the boot of the lowe
(recommended)-l,–ignore-locks ignore locked state reported by the target APIgnore the locked status reported by the target AP-e,–eap-terminate terminate each WPS session with an EAP FAIL packetTerminates the WPS process whenever an EAP failure packet is received-n,–nack Target AP always sends a nack [Auto]Always send Nack to target AP, default auto-w,–win7 Mimic a Windows 7 registrar [False]Analog win7 registration, default offReference:Http://lok.me/a/1972.htmlHttp://bao3.blogspot.com/2013/05/
Tags: Raspberry Pi wiringpi Zookeeper
1. Void pinmode (INT pin, int mode );
This function sets the Input and Output Modes of the pin and the input and output modes of PWM. InWiringpi onlyPin 1 (bcm_gpio 18) supports PWM output.
2. Void digitalwrite (INT pin, int value )
Prepare
Raspberry Pi Development Board ( Click here to purchase ) (has been brushed into the official Raspbian system )
USB to Serial board ( click here to buy )
DuPont Line (4 root)
Connection
串口板 树莓派--------------------VCC +5V(非必须)RX TXD(GPIO15)TX RXD(GPIO14)GND Ground Raspberry
Raspberry Pi advanced GPIO library, wiringpi2 for python Use note (3) GPIO operations, gpiowiringpi2
The core function of the GPIO library is to operate GPIO. GPIO is the "general input/output" interface, such as lighting up an LED or relay, or using iic spi 1-wire and other protocols, reading and writing data are all useful for GPIO. It can be said that without GPIO, R
(); Show An error if there is no Gpio controller if (GPIO = = null) { pin = null; Gpiostatus.text = "There is no GPIO controller on this device."; return; } Pin = Gpio. Openpin (Led_pin); Show an error if the pin wasn ' t initialized properly if (pin = = null) { Gpio
configured as a PWM output. In this example. I will gpio0,gpio1. The GPIO2 is configured as a soft PWM output. The PIN assignment table for the Raspberry Pi is for example with what you see: The RGB LEDs I use are common cathode, with the Raspberry Pi connection method suc
not possible to have a pi3-miniuart-bt-overlay, this can also, probably because the raspberry dispatched factory date different module name different , I found someone on the internet to provide Pi3-miniuart-bt-overlay module)Comment out the other UART settings in/boot/config.txt, this is best commented out, uart_enable=1 also commented out! remember!sudo apt-get updatesudo apt-get upgradesudo rebootThe UART from the start of the
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