Bread board dan penggunaannya

1. Menggunakan Breadboard

2.  Breadboard adalah papan khusus yang digunakan untuk membuat
prototype atau rangkaian elektronik yang bersifat percobaan.

3. Bagaimana menggunakannya?

5. Menggunakan Sensor Sederhana

6. DHT 11

7.  The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a
capacitive humidity sensor and a thermistor to measure the surrounding air, and spits
out a digital signal on the data pin (no analog input pins needed). Its fairly simple to
use, but requires careful timing to grab data. The only real downside of this sensor is
you can only get new data from it once every 2 seconds, so when using our library,
sensor readings can be up to 2 seconds old.
 Low cost
 3 to 5V power and I/O
 2.5mA max current use during conversion (while requesting data)
 Good for 20-80% humidity readings with 5% accuracy
 Good for 0-50°C temperature readings ±2°C accuracy
 No more than 1 Hz sampling rate (once every second)
 Body size 15.5mm x 12mm x 5.5mm
 4 pins with 0.1" spacing

9. DS18B20
 Usable temperature range: -55 to 125°C (-67°F to
+257°F)
 9 to 12 bit selectable resolution
 Uses 1-Wire interface- requires only one digital pin
for communication
 Unique 64 bit ID burned into chip
 Multiple sensors can share one pin
 ±0.5°C Accuracy from -10°C to +85°C
 Temperature-limit alarm system
 Query time is less than 750ms
 Usable with 3.0V to 5.5V power/data

11. Adafruit Python DHT Sensor Library
 Python library to read the DHT series of humidity and temperature sensors
on a Raspberry Pi or Beaglebone Black.
 Designed specifically to work with the Adafruit DHT series sensors

12. apt-get update
sudo apt-get install build-essential python-dev
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
sudo python setup.py install

13. Test Sensor
sudo python examples/AdafruitDHT.py 11 4

14. WEBIOPI

15.  Control, debug, and use your Pi's GPIO, sensors and converters from a web
browser or any app
 WebIOPi is the perfect Swiss-knife to make connected things
 Developed and provided by Eric PTAK (trouch)
 Runs on Raspberry Pi

17. GPIO header web app

18. Device monitor web app

19.  WebIOPi is developed and tested on Raspbian. You only need Python,
either 2.7 or 3.2. Download, then extract and install WebIOPi. The setup
script will automatically download and install required dependencies using
apt-get. You may have to manually install GCC and Python development
headers if you are not using Raspbian.

20. Installasi
$ tar xvzf WebIOPi-x.y.z.tar.gz
$ cd WebIOPi-x.y.z
$ sed -i 's/ python3//' setup.sh
$ sudo ./setup.sh
$ sudo webiopi-passwd
$ sudo service webiopi restart

21. Python side
import webiopi
import Adafruit_DHT
import json
SENSOR = Adafruit_DHT.DHT11
PIN = 24
@webiopi.macro
def temperature():
humidity, temperature = Adafruit_DHT.read_retry(SENSOR, PIN)
if humidity is not None and temperature is not None:
fahrenheit = 9.0 / 5.0 * temperature + 32
return json.dumps({
"temperature": fahrenheit,
"humidity": humidity
})
else:
return False

22. Html side