IMPORTANT UPDATE APRIL 2015: The BBC has changed the way it streams network radio – see here for details.
I love making internet radios with Raspberry Pis. Here are a few that I’ve built:
- A really, really simple one with just a button for changing channel. Scroll down this page for instructions on how to build one.
- One that you can control from a web page on your phone and which tells you what songs are playing.
- One with an LCD display for station and time info, driven by an Arduino
- I also used a Pimoroni Displayotron 3000 to make a very compact and beautiful little radio that uses a lovely LCD/joystick combo shield.
- I also used cron for quick and dirty radio scheduling.
- I’m also trying to build one in and old rotary dial phone.
Update: this project can also now be found on GitHub: https://github.com/blogmywiki/pi-radio
There are a few Raspberry Pi internet radio projects out there. Here’s one I made pretty much from scratch – I think it’s probably the simplest functional bare-bones internet radio you can make. It starts up when you turn your Pi on and has a single push button for changing the station – no display, no volume control, uses the Pi’s on-board sound jack – in fact nothing fancy at all. The only clever thing about it, is that it remembers which station you were listening to last time it was turned on – though you can make it even simpler and more reliable by removing that bit of the code (see the end of this post).
You will need:
- A RaspberryPi with a fresh headless install of Raspbian – this means you set it not to boot into a graphical environment when it starts up.
- A push button.
- A 10k and a 1k ohm resistor, and some way of wiring them together (such as a breadboard) and some way of connecting 3 wires to pins on the RaspberryPi.
- Headphones or some powered speakers.
- Optional: USB wifi dongle to make your radio, er, wireless.
First, log into your Pi at the command line. Ensure it’s connected to the internet and update it by typing
sudo apt-get update
Then install mpd (music player daemon) and mpc (client) by typing the following:
sudo apt-get install mpc mpd
Add some internet radio stations by typing this at the command line to add BBC Radio 1:
mpc add http://bbcmedia.ic.llnwd.net/stream/bbcmedia_intl_lc_radio1_p?s=1365376033&e=1365390433&h=a0fef58c2149248d6bff1f7b7b438931
There are more stations BBC listed here: http://thenated0g.wordpress.com/2013/06/06/raspberry-pi-add-bbc1-6-radio-streams-and-mpc-play-command/
UPDATE: I’ve also recently discovered this article on RaspberryPi radio which has some very useful stuff on finding and updating BBC Radio streaming URLs.
I added BBC radios 1-6, and also added US public radio NWPR and the French station Fip, leaving me with 8 stations in total. Here’s how I added Fip (it’s a super-cool French music station):
mpc add http://audio.scdn.arkena.com/11016/fip-midfi128.mp3
(new Fip URL as of July 2015)
And for NPR try:
mpc add http://188.8.131.52:8000
Do try and add the stations in the order you want them to cycle through – you can re-order them using mpc at the command line, but it’s much easier to get them right first time. (I didn’t).
Test mpc is working by typing
mpc play 1
at the command line, and you should hear Radio 1 (or whichever station you added first) coming out of the Pi’s headphone jack. You can adjust the volume of your sound device by typing
at the command line. You get a graphical mixer in the command line which is pretty intuitive:
You can also adjust volume in mpc by typing:
mpc volume +5
or + or – any number you fancy.
to make the horrible noise go away.
Make your switch by connecting the button and resistors together, as in the circuit diagram above, based on the lower diagram on this page: http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/buttons_and_switches/
Using a little breadboard, connect one side of your push button to the 3.3v pin on the RaspberryPi. The other side of the switch is connected via a 1K resistor to RaspberryPi GPIO pin 23, and via a 10K resistor to a GND pin on the Pi (I used a different one in the photo to my diagram, but I don’t think it matters). You can find a good diagram of the pins here: http://elinux.org/RPi_Low-level_peripherals
Now in the home directory /home/pi save this file and call it radio.py. It assumes you have 8 stations set up – if you have a different number, change the 8 to the number you have.
#!/usr/bin/env python # Bare bones simple internet radio # www.suppertime.co.uk/blogmywiki import RPi.GPIO as GPIO import time import os GPIO.setmode(GPIO.BCM) GPIO.setup(23, GPIO.IN) # read station number from text file f = open('/home/pi/station.txt', 'r') station = int(f.read()) f.close os.system("mpc play " + str(station)) #initialise previous input variable to 0 prev_input = 0 while True: #take a reading from pin 23 input = GPIO.input(23) #if the last reading was low and this one high, do stuff if ((not prev_input) and input): # assumes you have 8 radio stations configured station += 1 if station > 8: station = 1 print(str(station)) os.system("mpc play " + str(station)) f = open('/home/pi/station.txt', 'w') f.write('%d' % station) f.close #update previous input prev_input = input #slight pause to debounce time.sleep(0.05)
Create a file called station.txt in the same folder containing just the number of the station you want it to play on the first run – eg 4 for Radio 4 (if Radio 4 was the 4th station you added).
Then test it by typing
sudo python radio.py
at the command line. The radio should play, and when you press the button it should change up through the channels, cycling back to 1 when it passes 8.
Next, to make it run at start up, type
sudo nano /etc/rc.local
and add the following line before the exit command:
(sleep 65; python /home/pi/radio.py)&
The ‘sleep 65′ is needed because my Pi has a USB wifi dongle which takes an eternity (well, a minute) to get on the network. If your Pi is connected to the internet by ethernet, you could probably make the sleep time an awful lot shorter.
Save it by typing ctrl-x. Reboot your Pi, and enjoy!
You can build on this by adding a USB sound card for better audio quality or by adding a display with buttons like this: http://www.suppertime.co.uk/blogmywiki/2013/12/piradio-with-clock/ and http://www.suppertime.co.uk/blogmywiki/2013/12/fip-radio/. Or, if you enjoy listening to one station as much as I like listening to Fip, you could make it even simpler by removing the button!
Update: you can make a really neat, compact radio using a RaspberryPi and a Displayotron3000: http://www.suppertime.co.uk/blogmywiki/2014/11/dot3k/
If you’re interested in making your own, really rather simple, schedule for your own radio, have a look at this idea I had for using cron to ensure you don’t miss your favourite programmes: http://www.suppertime.co.uk/blogmywiki/2013/12/raspi-radio-schedule/
Here’s a simpler version of the code that doesn’t remember the station you last listened to, and doesn’t require the station.txt file. It plays station number 8 by default (which is fip on my install):
#!/usr/bin/env python # Bare bones simple internet radio # www.suppertime.co.uk/blogmywiki import RPi.GPIO as GPIO import time import os GPIO.setmode(GPIO.BCM) GPIO.setup(23, GPIO.IN) # sets initial station number to channel 8 station = 8 os.system("mpc play " + str(station)) #initialise previous input variable to 0 prev_input = 0 while True: #take a reading from pin 23 input = GPIO.input(23) #if the last reading was low and this one high, do stuff if ((not prev_input) and input): # assumes you have 8 radio stations configured station += 1 if station > 8: station = 1 os.system("mpc play " + str(station)) #update previous input prev_input = input #slight pause to debounce time.sleep(0.05)
See also notes on adding stations and accounting for summer time here: http://www.suppertime.co.uk/blogmywiki/2014/04/sublime-bst/
And there’s a May 2014 update to the LCD code and a useful list of internet radio stations here.