Embed Size (px)
Citation preview
Raspberry piAn Introduction
What is Raspberry pi
Credit card sized computer with incredible features
SOC HDMI ETHERNET
GPIO
USP?
Model A = $25
Model B = $35
Uses low power SOC (System on Chip) Broadcom
BCM2835
BCM2835 supports applications from word
processing, web-browsing to 3D gaming
Linux OS
Industry standard for prototyping IOT applications
We’re excited to announce that we are expanding our Windows
Developer Program for IoT by delivering a version of Windows 10
that supports Raspberry Pi 2 -Microsoft
Brains of PI
ARM1176JZF is the central nervous system of PI
This means any language that can compile on
ARMv6 can be used with raspberry pi
Features of PI
SOC powerful enough to easily render opengl 3D graphics, games and other multimedia applications
512 MB of ram Low power consumption (micro USB few
watts) Built in support for Camera module 40 GPIOs 4 USB ports Audio output SD card (primary storage device)
GPIO general purpose IO
Raspberry pi model B+ has a set of
about 40 GPIOs
What is a GPIO?
A GPIO is a terminal for electronic
signals which can act as source or
sink of signals.
Signals may be both control as well as
data signals
Plays an important role in automation
applications
Python package required to use GPIO
from raspberry pi
sudo apt-get install python-RPi.GPIO
BCM vs Board-mode
Board mode means to refer to the pin-
number via it’s position on the board
starting from 1-40
In BCM mode we refer to the pin
names rather than by numbers. It is
based on Broadcom SOC channel
number
Words of Caution !!
While working with GPIO it is
important to keep in mind that they are
directly connected to the micro-
processor
Means NO overhead protection
If a high current/voltage signal is
applied to the pin, It may burn the PI
Booting up the Raspberry
Step-1 “Choice of OS”
For windows and linux users
Download the zip file and extract the OS image
Insert sd card in the sd card reader
Use Win32DiskImager to write to the sd card
Detailed instructions can be found on the raspberry pi
website:
http://www.raspberrypi.org/documentation/installati
on/installing-images/windows.md
For Linux Users:
http://www.raspberrypi.org/documentation/installati
on/installing-images/linux.md
Caution: Linux users should be very careful with
the use of DD command.
NOOBS Project
“New Out Of The Box Software” for beginners
It gives you the options to choose from different
operating systems
Download NOOBS zip file and extract it
Format SD card and “drag/drop files into it”
On first boot we see a screen like this
For Lazy Coders
Perhaps the most easy way to get
started with Raspberry PI
Buy an SD card with NOOBS pre-
installed and plug it into the pi
Saves you a lot of time if you are more
concerned about app development
Monitor, mouse and keyboard
Raspberry pi supports High Definition
video output through HDMI port
We can use our HD TV as a monitor
for raspberry pi
Raspberry pi has 4 usb ports and any
2 can be used to connect a mouse
and a keyboard
I can’t take LED with me all the
time Relax we have a solution !!
Now edit the IPv4 settings in windows also So they are both in same local network
Edit: /etc/network/interfaces
SSH into your pi
Use an ssh client e.g. PUTTY
Enter the password of your raspberry
pi
Start Exploring
Why Pi is choice of IOT
industry Raspberry Pi is a good starting point for home and
industry automation prototypes
Because >>
Ease of Use
Cost Effective
Can be programmed easily to do
powerful things
Pi Onboard Camera Module
Enables pi to see things around
About the camera
Sensor type: OmniVision OV5647
Sensor size: 3.67 x 2.74 mm
Pixel Count: 2592 x 1944
(5megapixel)
Pixel Size: 1.4 x 1.4 um
Video: 1080p at 30 fps with codec
H.264
Connects to Raspberry via CSI
interface
Using camera to capture
images raspistill [options] -?, --help : This help information -o, --output : Output filename
<filename> -v, --verbose : Output verbose
information during run -d, --demo : Run a demo mode (cycle
through range of camera options, no capture)
-sh, --sharpness : Set image sharpness (-100 to 100)
More options
-ex, --exposure : Set exposure mode
Exposure mode options :
auto,night,nightpreview,backlight,spotli
ght,sports,snow,beach,verylong,fixedf
ps,antishake,fireworks
Video options
raspivid [options]
-o, --output : Output filename
<filename>
-t, --timeout : Time (in ms) to capture
for. If not specified, set to 5s
Example USAGE: raspivid –o
sample.mp4
Pi Relay Module
Lets control the world of Alternating
Current AC
Mapping from PI to Relay
5V output from Pi to VCC pin of Relay
Ground to Ground of relay
{
GPIO => Relay
}
We can use any GPIO as long as it is
not meant for other purposes
