Python Programming Language

Python is a programming language that lets you work quickly and integrate systems more effectively.

Python Installation

Check Python is installed

  1. root@platform:~# python --version

Python Mraa Hello Internet of Things

Create your first Python script, the common “Hello Internet of Things” example

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Hello Internet of Things
  4. print 'Hello Internet of Things @ Python'
  6. # End of Python Script
  1. root@platform:~# python iot.py

Python Mraa Version

Let’s get the version of mraa library we installed

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Libraries
  4. import mraa
  6. # Mraa Version
  7. print (mraa.getVersion())
  8. print (mraa.getPlatformName())
  9. print (mraa.getPlatformType())
  11. # End of Python Script
  1. root@platform:~# python iot.py

Python Mraa Analog Input Output (AIO)

Let’s work with Analog Input Output

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Libraries
  4. import mraa
  6. # Mraa Aio
  7. aioline = mraa.Aio(0)
  8. aioline.setBit(10)
  9. aioline.read()
  10. print ("%.5f" % aioline.readFloat())
  11. # End of Python Script
  1. root@platform:~# python iot.py

Python Mraa Inter-Integrated Circuit (I2C)

Let’s work with Inter-Integrated Circuit protocol

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Libraries
  4. import mraa
  6. # Mraa I2C
  7. if mraa.getPlatformType() == 1:
  8.     i2cline = mraa.I2c(0)
  9. if mraa.getPlatformType() == 2:
  10.     i2cline = mraa.I2c(1)
  11. i2cline.address(0x6b)
  12. print i2cline.readReg(0x6b, 0x80)
  14. # End of Python Script
  1. root@platform:~# python iot.py

Python Mraa General Purpose Input Output (GPIO) Direction Output

Let’s work with General Purpose Input Output, Direction Output

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Libraries
  4. import mraa
  5. import time
  7. # Mraa GPIO Direction Output
  8. if mraa.getPlatformType() == 1:
  9.     gpioline = mraa.Gpio(13)
  10. if mraa.getPlatformType() == 2:
  11.     gpioline = mraa.Gpio(44)
  12. gpioline.dir(mraa.DIR_OUT)
  13. gpionextvalue = not gpioline.read()
  14. gpioline.write(gpionextvalue)
  15. time.sleep(1)
  16. gpioline.write(not gpionextvalue)
  18. # End of Python Script
  1. root@platform:~# python iot.py

Python Mraa Universal Asynchronous Receiver/Transmitter (UART)

Let’s work with Universal Asynchronous Receiver/Transmitter

  1. root@platform:~# vi iot.py
  1. #!/usr/bin/python
  3. # Libraries
  4. import mraa
  6. # Mraa UART
  7. uartdevice = mraa.Uart(0)
  8. print uartdevice.getDevicePath()
  10. # End of Python Script
  1. root@platform:~# python iot.py