raspberry pi gpio library

Reference: http://programmingadvent.blogspot.hk/2012/12/raspberry-pi-uart-with-pyserial.htmlRaspberry Pi UART with pyserial os:occidentalis v0.2Hardware:raspberry Pi Revision B with CobblerSetup:serial Loopback (Connect RX and TX pins on GPIO pins)Linux attempts to treat all

We have explained in detail the Raspberry Pi control ultrasonic module ranging (http://www.cnblogs.com/yuemo/p/8888342.html) and ultrasonic control buzzer module audible (http://www.cnblogs.com/ yuemo/p/8906111.html).Today we'll see how to apply all two modules and make an anti-theft device.First look at the connection of each pin (requires seven mother-to-female DuPont line):Ultrasonic module:1.VCC: Connec

compiler writes a cross-compiled compiler. For example, Makefile, 1 demo: $ (obj)2 $ (CXX)-o $ ^ $ (LDFLAGS) The CXX must be arm-linux-gnueabihf-g ++ to compile the correct executable files on Raspberry Pi. 2. Compile a third-party library If you want to set global CC and CXX variables, enter the following command every time you open a new Terminal: 1 $ export C

CROSS_COMPILE = arm-linux-gnueabihf-INSTALL_MOD_PATH =/mnt/ext4 modules_install Copy the kernel and drive to the SD card # Back up the original kernel firstCp/mnt/fat32/$ KERNEL. img/mnt/fat32/$ KERNEL-backup.imgScripts/mkknlimg arch/arm/boot/zImage mnt/fat32/$ KERNEL. imgCp arch/arm/boot/dts/*. dtb/mnt/fat32/Cp arch/arm/boot/dts/overlays/*. dtb */mnt/fat32/overlays/Cp arch/arm/boot/dts/overlays/README/mnt/fat32/overlays/ Update firmware Tar xvf firmware-master.tar.gzCd firmware-master# Replaci

mode; (5) Photo time, set to 1 second; (6) image size, set to 640x480. The script will automatically take 78 photos, each of which will apply different special effect parameters. To execute this script, you only need to enter the following command line: $ python name_of_this_script.py Below are some samples captured. Small benefits In addition to using the raspistill command line tool to manipulate the raspicam camera module, there are other methods to use. Picamera is a python

-dev Libtiff-dev Libjasper-dev2. Get the source code to create the OpenCV folder in the Raspberry Pi user directory mkdir OpenCVTo get OpenCV source code from sourceforge website, this article chooses 2.4.9 version. The download process may be slow, please wait patiently. wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download Opencv-2.4.9.zipExtract the source c

Introduced The DHT11 is a cheap accessory that includes temperature and humidity sensors, and the code is easy to use. This article describes if you use DHT11 in a Raspberry Pi, the code is python. If you have any questions, please leave a comment below. Wiring VCC Connection 5V or 3.3V Data is connected to the Gpio (I'm picking up the B

Raspberry PI 3 to create a music player 1. Software Environment sudo apt-get update sudo apt-get upgrade sudo apt-get install mplayer2//music playback software sudo apt-get install Alsamixergui//volume control 2. Prepare the song Find a song. MP3 Songs Here is a: wget Http://blog.lxx1.com/wp-content/uploads/2016/07/shero.mp3 3, set the Raspberry

please refer to the other blog post for the circuit connection method: "Color control for RGB LEDs with Raspberry Pi--c language version"Python code:#!/usr/bin/env python#********************************************************* #File Name:rgb.py#author:jason Dai #Date: 2015/02/04#*********************************************************import Rpi.gpio as GPIOimport timecolors = [0xFF0000, 0x00FF00, 0x0000

0. PrefaceThis blog post may not have much use value. But practice for practice. There are many ways to use SQLite on Raspberry Pi, and there are many ways to install it. "1" assumes that Python is used, so you don't have to install SQLite because Python has its own sqlite."2" can be installed using Apt-get. Only the version of SQLite is slightly lower. "3" can be installed using the source code, directly

the digital tube. The correspondence depends on the order in which you send the data when you wire and write the code. DS is a serial input pin, so-called serial is to make the data on a signal line in order to transmit one by one, like a string of candied fruit. This pin we received from the Raspberry Pi at any one of the Gpio ports (output mode). The

The simplest of a Raspberry Pi Gpio operation Getting started, here is a record of the followingFirst on the connection diagram:Horizontal slots. Figure Akzent The BigUsing the Gpio gnd and #18 pins, this is not, the red wire is 18 pins, the dark line is the GND pin, the following Python code:1 #Coding:utf-82 ImportGpi

)(System.Math.Abs(e.y - ( i = ; i Definition of steering gear parameters: PWM [] steering_pwm = PWM [UInt32 [] periods = UInt32 [] {,}; Cpu. PWMChannel [] steering_chanels = (I =; I Ps2_Click (e. key = PS2.Key. LRocker)]. duration = (UInt32) (durations [] + (-e. x) *]. duration = (UInt32) (durations [] + (-e. y) * (e. key = PS2.Key. r2) + =; (value>) value =]. duration = (UInt32) (durations [] + (value-) * (e. key = PS2.Key. r1)-=; (value Http://v.youku.com/v_show/id_XNjY2MTE1NjQ0.html

() Camera.close () Gpio.output (G PIO. Low) def setup (): Gpio.setmode (GPIO). BOARD) # Numbers GPIOs by physical location Gpio.setup (Gpin, GPIO. # Set Green Led Pin mode to Output Gpio.setup (Rpin, GPIO). # Set Red Led Pin mode to Output Gpio.setup (GPIO). Out) Gpio.setup (Btnpin,

Raspberry Pi B + timing to IoT Yeelink uploading CPU GPU temperatureHardware platform: Raspberry Pi B +Software platform:1 Installing the Requests LibraryFirst we have to solve the requests library, when we send to Yeelink POST message will use: R = Requests.post (Apiurl, He

Before the text Because recently busy review exam, so did not pick up the Raspberry Pi car, until yesterday, finally empty time to put the code down and share with you. BodyIn the second of the Raspberry Pi Trolley series, there are two ways to define the pin of the R