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Internet of Things Programming with JavaScript

You're reading from   Internet of Things Programming with JavaScript Get the best out of Arduino and Raspberry Pi Zero to develop Internet of Things projects using JavaScript

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Product type Paperback
Published in Feb 2017
Publisher Packt
ISBN-13 9781785888564
Length 298 pages
Edition 1st Edition
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Author (1):
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Ruben Oliva Ramos Ruben Oliva Ramos
Author Profile Icon Ruben Oliva Ramos
Ruben Oliva Ramos
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Table of Contents (10) Chapters Close

Preface 1. Getting Started with Raspberry Pi Zero 2. Connecting Things to the Raspberry Pi Zero FREE CHAPTER 3. Connecting Sensors - Measure the Real Things 4. Control-Connected Devices 5. Adding a Webcam to Monitor Your Security System 6. Building a Web Monitor and Controlling Devices from a Dashboard 7. Building a Spy Police with the Internet of Things Dashboard 8. Monitoring and Controlling Your Devices from a Smart Phone 9. Putting It All Together

Raspberry Pi GPIO header

The following screenshot is a chart of the GPIO pins of the Raspberry Pi Zero. In this case, we will use the SPI configuration interface (SPI_MOSI, SPI_MISO, SPI_CLK, SPI_CE0_N):

Raspberry Pi GPIO header

The following diagram shows the name of the pins of the MCP3008 chip that you connect to the Raspberry Pi: 

Raspberry Pi GPIO header

The following image shows the temperature sensor:

Raspberry Pi GPIO header

You need to connect the following pins according to the next description:

  • VDD to 3.3 volts
  • VREF to 3.3 volts from the Raspberry Pi Zero
  • Pin AGND to GND
  • Pin CLK (clock) to GPIO11 of the Raspberry Pi
  • DOUT to GPIO9
  • Pin DIN to GPIO10
  • Pin CS to GPIO8 and the pin
  • Pin the MCP3008D GND to Ground

This connection is represented in the following figure:

Raspberry Pi GPIO header

The following image shows the connections of the sensor to the ADC MCP3008 and the Raspberry Pi:

Raspberry Pi GPIO header

Reading the data with a Python script

In the next section, you will create the MCP3008.py file; you need to follow the next steps:

  1. Open the terminal on your Raspberry Pi Zero.
  2. Enter the interface in...
You have been reading a chapter from
Internet of Things Programming with JavaScript
Published in: Feb 2017
Publisher: Packt
ISBN-13: 9781785888564
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