Here we are, the SD card is loaded with Raspbian Wheezy and the SSH connection is established.
Let’s install the require dependencies to make the hydrosystem platform works:
The installation will be made on the entire system (no virtual environment used)
Connect through SSH -> pi@raspberrypi ~ $ .
Optionally if we want to have the most updated system, type the two below commands:
sudo apt-get update sudo apt-get upgrade
Now let’s install the dependencies:
sudo apt-get install python-dev
sudo apt-get -y install python-pip
sudo pip install flask
sudo pip install apscheduler
sudo pip install pyserial
(for the webcam support)
sudo apt-get install fswebcam
(for external IP address, using DNS)
sudo apt-get install dnsutils
sudo pip install pbkdf2
(encryption)
sudo pip install tornado
(web server)
Libraries for the Sensors
DHT22 library (Hymidity and temperature sensor):
sudo apt-get install build-essential python-dev mkdir DHT22 cd DHT22 wget https://github.com/adafruit/Adafruit_Python_DHT/archive/master.zip unzip master.zip cd Adafruit_Python_DHT-master sudo python setup.py install cd .. cd ..
Enable I2C and Spi :
sudo nano /boot/config.txt
The lines are already there, just remove the # in front of the row
dtparam=i2c_arm=on dtparam=spi=on dtparam=i2s=on
then modules should be added to modules file:
sudo nano /etc/modules
paste in the file the following lines:
i2c-bcm2708 i2c-dev i2c-bcm2835 rtc-ds1307 bcm2835-v4l2
sudo apt-get install git build-essential python-dev python-smbus sudo apt-get install -y i2c-tools
IMPORTANT:
if you want to use the picamera, it is needed to enable it.
This can be done using thefollowing command:
sudo raspi-config
INSTALL SPI library:
sudo apt-get install python2.7-dev wget https://github.com/Gadgetoid/py-spidev/archive/master.zip unzip master.zip rm master.zip cd py-spidev-master sudo python setup.py install cd ..
INSTALL BMP180 library (pressure sensor)
sudo apt-get install git build-essential python-dev python-smbus
Create and go in directory bmp180
sudo mkdir bmp180 cd bmp180
Copy the adafruit program
sudo git clone https://github.com/adafruit/Adafruit_Python_BMP.git cd Adafruit_Python_BMP sudo python setup.py install cd .. cd ..
Real Time Clock (RTC)
To ensure the DS3132 device is setup and the time synchronised when the Pi boots we need to edit another system file :
sudo nano /etc/rc.local
Add the following two lines before the exit 0 line :
echo ds3231 0x68 > /sys/class/i2c-adapter/i2c-1/new_device || true
hwclock -s || true
Hydrosys4 