raspberry pi gpio extender

Have done some works of the internet of things, because do not want to always do the app to control, because not everyone to download your own app, browser everyone is there, then everyone through the browser Web to access our server, it is not very simple and convenient, using Flask+python.Flask is a lightweight WEB application framework written in Python that is simple to use and easy to get started with.Install Flask:sudo apt-get install Python-pipsudo pip install flaskThen a simple server is

40 Gpio on a Raspberry Pi is the best thing to play.They can be directly controlled by c,/c++, Python, Java and other languages.Now, let's see how to do the same thing with node. js.Before you try, install node. js, and move to: 1. Prepare the Test foldermkdir/home/pi/documents/test-

The DHT11 is a temperature and humidity sensor with calibrated digital signal output. Precision humidity +-5%RH, temperature +-2℃, range humidity 20-90%rh, temperature 0~50℃. I bought a good package of modules, the top with a pull-up resistor, directly to the Raspberry Pi can be gray, purple, blue respectively represents data, 3.3V, 0V, to the Raspberry

On-line tutorials, general Python with Rpi.gpio to control the Raspberry Pi Gpio, and C + + generally use WRINGPI library to operate Gpio,rpi.gpio too simple, many advanced features do not support, such as I2C/SPI library, etc., but also lack of high-precision timing and other advanced features. In contrast, WIRINGPI i

Raspberry Pi Development Notes (1): Start Raspberry Pi 3b and run the Raspberry Pi system, raspberry 3b Raspberry

This article by the Raspberry Pi Fan itjoker editor, reprint please indicate the source. I also have Sina blog is also Raspberry Pi fan itjoker may name less it ...Required Materials: Raspberry Pi 2B or more than 2B, l2985n Drive

For those who already have a certain Linux Foundation, Raspberry Pi should be very simple and natural to learn. In their eyes, Raspberry Pi is a simple, cartoon version of Linux. However, it is not easy for me to compile, compile, and run a simple program for a person or beginner who is familiar with the Microsoft tech

the board, but requires a USB-to-TTL module. This module can be bought on the internet and a few dollars cheaper.The following is a Raspberry Pi B + version of Gpio PIN definition:USB to TTL used to 4 pins for 3.3V, GND, TXD, RXD (note official online said must use 3.3V)The pin used for Raspberry

is sometimes laborious and crashes more than once. I see this software development stalled and sad, as if they didn't have more contributors to the larger community (though many people still use it).CraftbeerpiThen I stumbled across a Python-written craftbeerpi, which has an active contributor-supported development community. The original author (and current maintainer), Manuel Fritsch, has done a good job of contributing and handling feedback issues. It took me a little time to clone this ware

GPIO UsageBelow is a brief introduction to the more commonly used gpio usages:1.导入GPIO模块 import RPi.GPIO as GPIO 2.将GPIO引脚设置为BOARD模式 3.设置GPIO引脚通道 作为输入 GPIO.setup(pin,GPIO.IN) 4.设置初始化为高电平 5.软件实现上/下拉：

After buying the Raspberry Pi, what can I do with it? There are a few ideas to share with the beginner's teaching film, which is well worth a visit. Http://www.youtube.com/user/RaspberryPiBeginners 1.Plug in the expansion card, DIY or teaching.The main usage, of course, is to plug in a GPIO card, put on a noodle board, pull some electrical circuit, control what t