Difference between revisions of "Internet of Things Lighting python"

Latest revision as of 01:16, 7 April 2021

In this lab, we will learn how to control the lab lighting using a computer. This should reveal some of the amazing possibilities of the IoT. We will learn about this while playing with a little python scripting on Windows.

Turning the lights on and off

The lab you are sitting in contains network-accessible lighting. Look directly above you and make a note of the FIXTURE NUMBER noted one your light. Note the command provided below.

import requests
url = 'http://10.50.41.230/api/override'
fixtureNo = #this is the number on the LED Above your desk
json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 255,"green": 0,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
#try changing the red, green and blue values and see what happens
requests.put(url=url,  data=json)
print("Check your LED!")

Copy the lines above into notepad++, and then change the FixtureNo to the light found on your computer overhead. save the file to your desktop named IOT-LED.py

open command prompt

cd Desktop
python IOT-LED.py

Tasks

Can you make the LED Purple?
Can you make the LED Orange?
Can you turn the LED off?

For help with colors check out https://www.w3schools.com/colors/colors_rgb.asp

TIP: remember to save your code before running it

Some Basic Python Programming

The internet of things is all about communicating with other devices and services, this section we will get weather information and work with response data.

Your instructor will give you your APIKey.

import requests, json
APIkey = 'b0aa5d74a76a853c83a1210b27236f3c' #this will be provided by your instructor
CityName = 'Perth'
url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
print(url)
response = (requests.get(url=url).json())

print('allData:' + str(response))
print('current:' + str(response['main']['temp']))
print('Temp Max:' + str(response['main']['temp_max']))

Save the file as weather.py

open command prompt

cd Desktop
python weather.py

Tasks

Can you modify the program to get the weather for Melbourne?
Can you modify the program to get the temp_min?
Can you modify the program to see if you can print the wind speed?

a JSON validator may help visualize the data https://jsonformatter.curiousconcept.com/

python IF statements

We are going to use if statements to test the data we got back. If the temp is over 30 degrees we will print 'hot', over 24 'warm' and finally 'cool'.

import requests, json
APIkey = '' #this will be provided by your instructor
CityName = 'Perth'
url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
print(url)
response = (requests.get(url=url).json())

print('allData:' + str(response))
print('current:' + str(response['main']['temp']))
print('Temp Max:' + str(response['main']['temp_max']))

temp = int(response['main']['temp'])

if temp > 30:
   print('hot')
elif temp > 24:
   print('warm')
else:
   print('cool')

Tasks

Add an if statement to print 'Freezing!' when below 5 degrees
Test this out by changing city name to Antarctica

Change the LED base on the current temperature

Now we need to add the two scripts together, one to get the weather and another to change the colour, blue for cold, greed for good, red for hot

import requests, json
APIkey = 'b0aa5d74a76a853c83a1210b27236f3c' #this will be provided by your instructor
CityName = 'Perth'
url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
print(url)
response = (requests.get(url=url).json())

print('allData:' + str(response))
print('current:' + str(response['main']['temp']))
print('Temp Max:' + str(response['main']['temp_max']))

temp = int(response['main']['temp'])
fixtureNo = 
url = 'http://10.50.41.230/api/override'

if temp > 30:
   json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 255,"green": 0,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
   requests.put(url=url,  data=json)
elif temp > 24:
   json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 0,"green": 255,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
   requests.put(url=url,  data=json)
else:
   print('cool')

Challenging Tasks

Can you modify the script to turn the LED blue if it is cold?
Can you modify the script to fade for a longer time if it is windy? (Hard)
Can you modify the script so that if the sky is cloudy have the intensity (brightness) lower? (Hard)

Difference between revisions of "Internet of Things Lighting python"

Latest revision as of 01:16, 7 April 2021

Contents

Turning the lights on and off

Tasks

Some Basic Python Programming

Tasks

python IF statements

Tasks

Change the LED base on the current temperature

Challenging Tasks

Navigation menu

Personal tools

Namespaces

Variants

Views

More

Search

Navigation

Tools

@@ Line 1: / Line 1: @@
-In this lab, we will learn how to control the lab lighting using a computer. This should reveal some of the amazing possibilities of the IoT, as well as some of the potential for misuse if security is not handled correctly. We will learn about this while playing with a little python scripting on Windows.
+In this lab, we will learn how to control the lab lighting using a computer. This should reveal some of the amazing possibilities of the IoT. We will learn about this while playing with a little python scripting on Windows.
 == Turning the lights on and off ==
@@ Line 7: / Line 7: @@
 import requests
 url = 'http://10.50.41.230/api/override'
-fixtureNo = FIXTURENUMBER
+fixtureNo = #this is the number on the LED Above your desk
 json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 255,"green": 0,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
+#try changing the red, green and blue values and see what happens
 requests.put(url=url,  data=json)
 print("Check your LED!")
 </pre>
-Copy the lines above into notepad++, and then change the '''FIXTURENUMBER''' to the light found on your computer overhead.
+Copy the lines above into notepad++, and then change the '''FixtureNo''' to the light found on your computer overhead.
 save the file to your desktop named IOT-LED.py
+open command prompt
+<pre>
+cd Desktop
+python IOT-LED.py
+</pre>
+====Tasks====
+*Can you make the LED Purple?
+*Can you make the LED Orange?
+*Can you turn the LED off?
+For help with colors check out https://www.w3schools.com/colors/colors_rgb.asp
+TIP: remember to save your code before running it
-How do you think you could switch the light off? Play with the parameters and ask for help if you need some guidance.
 == Some Basic Python Programming ==
-The internet of things is all about communicating with other devices and services, this section will continue with python requests and work with response data.
+The internet of things is all about communicating with other devices and services, this section we will get weather information and work with response data.
+Your instructor will give you your APIKey.
 <pre>
 import requests, json
-APIkey = 'b0aa5d74a76a853c83a1210b27236f3c'
+APIkey = 'b0aa5d74a76a853c83a1210b27236f3c' #this will be provided by your instructor
 CityName = 'Perth'
 url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
@@ Line 29: / Line 43: @@
 response = (requests.get(url=url).json())
-print('allData: + response')
+print('allData:' + str(response))
 print('current:' + str(response['main']['temp']))
 print('Temp Max:' + str(response['main']['temp_max']))
@@ Line 45: / Line 59: @@
 *Can you modify the program to get the weather for Melbourne?
 *Can you modify the program to get the temp_min?
 *Can you modify the program to see if you can print the wind speed?
-== Measuring the CPU temperature ==
+a JSON validator may help visualize the data https://jsonformatter.curiousconcept.com/
+== python IF statements ==
-We would like the operation of the fan to turn on to cool the CPU on your mini computer. The following command will show you the current temperature of your CPU
+We are going to use if statements to test the data we got back. If the temp is over 30 degrees we will print 'hot', over 24 'warm' and finally 'cool'.
+<pre>
+import requests, json
+APIkey = '' #this will be provided by your instructor
+CityName = 'Perth'
+url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
+print(url)
+response = (requests.get(url=url).json())
- cat /sys/class/thermal/thermal_zone2/temp
+print('allData:' + str(response))
+print('current:' + str(response['main']['temp']))
-Write down the CPU temperature at idle time.
+print('Temp Max:' + str(response['main']['temp_max']))
-Read the following code and see if you can work out what is going on. Open a new file, paste the code below and save it as temperature_visualisation.sh
-<pre>
+temp = int(response['main']['temp'])
-#!/bin/bash
-temp=$(cat /sys/class/thermal/thermal_zone2/temp)
+if temp > 30:
-echo $temp
+   print('hot')
+elif temp > 24:
+   print('warm')
+else:
+   print('cool')
 </pre>
 ====Tasks====
-*Use your knowledge of looping from the previous section to continually check and print the temperature for 2 minutes.
+*Add an if statement to print 'Freezing!' when below 5 degrees
-*See if you can integrate the line below to print a more meaningful temperature:
+*Test this out by changing city name to Antarctica
- n=1000
- temp=$((temp/n))
-== Generating CPU load ==
+== Change the LED base on the current temperature ==
-Open a second terminal window, while your previous code is running and paste in the following command to generate some load on your CPU
+Now we need to add the two scripts together, one to get the weather and another to change the colour, blue for cold, greed for good, red for hot
- stress --cpu 8
-How hot does your CPU get? Hit ctrl+c to close this window.
-== If statements ==
+<pre>
+import requests, json
+APIkey = 'b0aa5d74a76a853c83a1210b27236f3c' #this will be provided by your instructor
+CityName = 'Perth'
+url = 'http://api.openweathermap.org/data/2.5/weather?q=' + CityName +'&appid=' + APIkey + '&units=metric'
+print(url)
+response = (requests.get(url=url).json())
-Computer programs can take different actions/paths based on circumstances. Run the following code:
+print('allData:' + str(response))
+print('current:' + str(response['main']['temp']))
+print('Temp Max:' + str(response['main']['temp_max']))
-<pre>
+temp = int(response['main']['temp'])
-#!/bin/bash
+fixtureNo =
+url = 'http://10.50.41.230/api/override'
-temp=$(cat /sys/class/thermal/thermal_zone2/temp)
+if temp > 30:
-n=1000
+   json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 255,"green": 0,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
-temp=$((temp/n))
+   requests.put(url=url,  data=json)
-echo $temp
+elif temp > 24:
+   json = {"target": "fixture","num": fixtureNo,"intensity": 255,"red": 0,"green": 255,"blue": 0,"temperature": 255,"fade": 1.0,"path": "Default"}
-if [ $temp -gt 60 ]
+   requests.put(url=url,  data=json)
-then
+else:
- echo "Its really hot"
+   print('cool')
-elif [ $temp -gt 50 ]
-then
- echo "Its sorta hot"
-elif [ $temp -gt 40 ]
-then
- echo "Its coolish "
-elif [ $temp -gt 30 ]
-then
-  echo "Its cool"
-else
- echo "Dunno"
-fi
 </pre>
-You can change/test the temperature of the CPU using the load command used earlier.
 ==== Challenging Tasks====
-*Can you modify the code to change to a different colour based on the temperature, you can also play with the fade?
+*Can you modify the script to turn the LED blue if it is cold?
-*Can you then loop over this code block for 10 minutes or 600 seconds, it may be helpful to use the sleep command again and retest the temperature every second?
+*Can you modify the script to fade for a longer time if it is windy? (Hard)
+*Can you modify the script so that if the sky is cloudy have the intensity (brightness) lower? (Hard)