raspberry pi relay module

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

() - whileGpio.input (echo_pin): + Pass At2 =time.time () at return(T2-T1) *340/2 - - Try: - whileTrue: - Print 'distance:%0.2f M'%checkdist () -Time.sleep (3) in exceptKeyboardinterrupt: -Gpio.cleanup ()found that the catch of the exception is for Crtl+c trigger, before my several modules if the output of the CTRL + C or will continue to output, I can only write a script to close the output of the corresponding pin, with this abnormal capture, it is more convenie

The content of this article is Raspberry Pi python get GY-85 nine axis module information example, here using Python curses package development cli window program, used to refresh the sensor reading in real time, see the code first GY-85.py: The code is as follows: #! /Usr/bin/python3#-*-Coding: UTF-8 -*-Import cursesFrom time impor

Arrange reprint, original link http://www.eeboard.com/bbs/thread-5191-1-1.htmlThis post I intend to use qa way to write, so it is easier for everyone to see clearly the content of the entire post, hierarchical, clear conditioning, the following are my personal to the Raspberry Pi after the actual use of problems and solutions.1. Q: How does the Raspberry

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

qtsensors qtgraphicaleffects qtlocation qtserialport qttools qtquick1 qtquickcontrols; do cd $ MODULE;/usr/local/qt5pi/bin/qmake .; make-j4; sudo make install; cd ..; done (The execution of the preceding three commands takes a long time. Please wait. After execution) 6. Qt cross-compilation is successful, and a new Raspberry Pi image is burned. First, insert th

. /.. /linux/arch/arm/boot/zimage You can see a file called: Kernel.img under the current folder, which is the new kernel we need. d, extract modules The previous step actually not only compiled the kernel source code, some module files are also compiled, here we extract $CD RASPBERRYPI_SRC $mkdir Modules $CD Linux $ make Modules_install install_mod_path=. /modules We can get the module files we need in mo

Raspberry Pi (Raspberry Pi) sound output can be set to automatic, headset output, three types of output from HDMI, the default is automatic Pi @ aborn ~ $ Sudo apt-get install alsa-utilsPi @ aborn ~ $ Sudo modprobe snd-bcm2835 # Add the sound

after the first two steps our Raspberry Pi has worked normally, but before actually using it to develop some column configuration and software installation, so that the development will be handy, below we introduce the common software and services1. Configuration options:The first time a Raspberry Pi is used, a simple

via desktop app configuration run in Preferences Menu Raspberry Pi Configuration select Interfaces , enabling SSH Click OK to complete the configuration via Raspi-config tool terminal input sudo raspi-config select interfacing options select SSH

0 PrefaceThis article reads Raspberry Pi CPU temperature through file operations. In Linux, any device operations are abstracted as file read/write, read the content in the/sys/class/thermal/thermal_zone0/Temp File to get the Raspberry Pi CPU temperature. This article describes how to read and apply the temperature par

second display for the Raspberry Pi. After entering the source directory, enter in the terminal:CD "Grove–oled Display 128x64"sudo./oledgrove-oled Display working results: 6. Barometric pressure testGrove-barometer sensor is an electronic module that integrates air pressure and temperature sensing, and communicates with the