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Yocto for Raspberry Pi

You're reading from   Yocto for Raspberry Pi Create unique and amazing projects by using the powerful combination of Yocto and Raspberry Pi

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Product type Paperback
Published in Jun 2016
Publisher Packt
ISBN-13 9781785281952
Length 214 pages
Edition 1st Edition
Concepts
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Authors (2):
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TEXIER Pierre-Jean TEXIER Pierre-Jean
Author Profile Icon TEXIER Pierre-Jean
TEXIER Pierre-Jean
Petter Mabäcker Petter Mabäcker
Author Profile Icon Petter Mabäcker
Petter Mabäcker
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Toc

Table of Contents (13) Chapters Close

Preface 1. Meeting the Yocto Project FREE CHAPTER 2. Building our First Poky Image for the Raspberry Pi 3. Mastering Baking with Hob and Toaster 4. Understanding BitBake 5. Creating, Developing, and Deploying on the Raspberry Pi 6. Working with External Layers 7. Deploying a Custom Layer on the Raspberry Pi 8. Diving into the Raspberry Pi's Peripherals and Yocto Recipes 9. Making a Media Hub on the Raspberry Pi 10. Playing with an LCD Touchscreen and the Linux Kernel 11. Contributing to the Raspberry Pi BSP Layer 12. Home Automation Project - Booting a Custom Image

Controlling the lamp using the Raspberry Pi

At this point, we can control the relay locally from our board. Next, it's time to connect the lamp to our relay module.

Note

WARNING: This project require basic knowledge of electricals. We strongly discourage using high-voltage power if you don't have the knowledge or experience. The recommendation is to use a low-voltage 12-V power supply.

Controlling the lamp using the Raspberry Pi
A one-channel relay module

Before we connect the lamp, we need to go through some basics about how the relay module will be used. Look closely at the following relay; it contains C, NC, and NO openings on the opposite side to where we inserted the GPIO jumper cables. These slots will be used to connect the lamp to the relay.

The C on the relay stands for common connection, and we will connect the power from our external power supply to this port. Next, we have NC and NO, which stand for normally closed and normally open. In our project, we will be using NO. The reason for this is that it will work...

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