I’m working on an application/system where I have an FM radio chip in a Raspberry Pi, and I control the radio chip with a web service. The web service is written in Python, and is powered by the Python “Bottle” web server.
Here’s the Python/Bottle source code for my radio web application:
from bottle import route, run, template # the radio chip is an si4703; this is a python library to control it import si4703 fm = si4703.si4703() isOn = False @route('/') def index(): return 'hello, world' @route('/tune/<station>') def tune(station = '104.3'): global isOn if isOn == False: fm.init() isOn = True fm.tune(station) return 'ack' @route('/turn_off') def turn_off(): global isOn isOn = False fm.turn_off() return 'ack' @route('/set_volume/<volume>') def set_volume(volume = '10'): f,.volume(volume) return 'ack' run(host='localhost', port=5151)
If you’re familiar with Scala, this code looks like Scalatra (or Sinatra in Ruby). Libraries like this make creating small web applications very simple/easy/fast. I may write more about this in the future, but for today I just wanted to share this code in case someone needs a Python/Bottle example to get started.
Oops, I guess it would help to mention that I start the server like this on the Raspberry Pi (RPI):
$ sudo python server.py
This script is named server.py, and the
sudo part is needed because the si4703 library interacts with the RPI GPIO (hardware) ports.