Raspberry Pi GPIO Demo

Example of interacting with GPIO pins on a Raspberry Pi

About

This Skill demonstrates how to interact with the Raspberry Pi GPIO pins using a Mycroft Skill. This Skill shows both reading data from a GPIO port (detecting a button press) and writing data to the port (illuminating an LED).

Preparation

You will need to first install the GPIO libraries for Picroft, and add some additional permissions.

Generation

The documentation is done using Sphinx, which picks up comments from the code. The following will generate the html docs.

make docs

You can then find the generated html in docs/build/html/index.html. Open that file in your browser and you should be able to navigate to the docs.

Installing from the makefile

• Change the Makefile IP address for the RPi installation to the IP address of your RPi.

That is, edit the file makefile using your favorite editor like nano or vi.

The line you will need to change is scp -r * pi@192.168.205.115:/opt/mycroft/skills/skill-gpio.

Change this to have the IP address of your RPi.

• Create the folder /opt/mycroft/skills/skill-gpio on the RPi for the installer.

You can do this by using the command mkdir /opt/mycroft/skills/skill-gpio

• Build the code using the makefile. make install.pi

Testing the makefile

make test.pi

This will run a test to be sure you have access to the GPIO and will report any errors that are identified.

Notes

If the LED blinking is too fast, it will be difficult to get a command to execute because there will be a voice response when the the LED turns off and on. Turn the blinking to a lower frequency to be able to execute commands.

Circuit

Please use the below image as a guide to the circuit layout:

Examples

• "Turn LED on"
• "Turn LED off"
• "Blink LED"
• "LED status"

Credits

@amcgee7 Mycroft AI (@MycroftAI)

Supported Devices

platform_mark1 platform_picroft

Category

IoT

Tags

#IoT #GPIO #RPi