Home > Developer > Web Develop
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 household appliances you want to control!
Click the button on the page directly to control the appliance!
Here is the page:
pi@raspberrypi~@sudo pip install flask
2. writing a python program
Create a file named weblight.py and write the following code:
ImportRpi.gpio asGPIO fromFlaskImportFlask, render_template, Requestapp = Flask (__name__) Gpio.setmode (GPIO. BCM) pins = { -: {' name ':' TV ',' state ': GPIO. Low}, -: {' name ':' Light ',' state ': GPIO. Low}} forPininchPins:GPIO.setup (PIN, GPIO.) Out) Gpio.output (PIN, GPIO. Low)@app. Route ("/") def main(): forPininchpins:pins[pin][' state '] = Gpio.input (pin) TemplateData = {' pins ': pins}returnRender_template (' main.html ', **templatedata)@app. Route ("/<changepin>/<action>") def action(Changepin, action):Changepin = Int (changepin) devicename = pins[changepin][' name ']ifAction = ="on": Gpio.output (Changepin, GPIO. High) message ="turned"+ DeviceName +"on." ifAction = ="Off": Gpio.output (Changepin, GPIO. Low) message ="turned"+ DeviceName +"off." ifAction = ="Toggle": Gpio.output (Changepin, notGpio.input (changepin)) message ="toggled"+ DeviceName +"." forPininchpins:pins[pin][' state '] = Gpio.input (pin) TemplateData = {' message ': Message,' pins ': pins}returnRender_template (' main.html ', **templatedata)if__name__ = ="__main__": App.run (host=' 0.0.0.0 ', port= the, debug=True)If we want to add one more port control appliance, it's simple we can do this:
Put
pins = { 24 : {‘name‘‘TV‘‘state‘ : GPIO.LOW}, 25 : {‘name‘‘Light‘‘state‘ : GPIO.LOW} }
Switch
pins = { 24 : {‘name‘‘TV‘‘state‘ : GPIO.LOW}, 25 : {‘name‘‘Light‘‘state‘ : GPIO.LOW} 26 : {‘name‘‘Coffee Maker‘‘state‘ : GPIO.LOW} }
3. Writing HTML files
Under the directory where weblight.py is located, create a subdirectory named templates. In the Templates subdirectory, create a directory named
main.html the file and enter the following code:
All of the brackets in this HTML page template are parsed into variable names, which are replaced by actual data when the Python script calls the Render_template function.
<! DOCTYPE html><head><title>Home Intelligent Control</title></head><body><H1>Home automation Project</H1><img src="http://www.5qdd.com/files/all/121207/6-12120G43028.jpg" border ="0" widgth= "" " height=" > "</a><h2>Student Name:<font size ="6" color="Red" >Tom</font> </H2>{% for pin in pins%} <p> the{{Pins[pin].name}}{% if pins[pin].state = = true%}(<a href="/ {{pin}} /off "> close </a>){% else %}(<a href="/ {{pin}} /on "> open </a>){% endif %}</P>{% endfor %}{% if message%}<h3>{{message}}</h3>{% endif %} </body></html> Analytical:
Home Intelligent Control
"Home Intelligent Control" is the title of the page, you can change to the title you like
4. start the server
pion http://0.0.0.0:80/with reloader
Finally: The relay is connected to the control of the I/O, in the LAN landing the IP address of the Raspberry Pi, the realization of the network control home appliances!
Raspberry Pi-web Control Appliance
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
