Introduction: Arduino / Raspberry Pi Internet Radio
This is a project for Arduino and Raspberry Pi to make an Internet
Radio, aimed at intermediate skill level. Some familiarity with Linux usage will be beneficial (or access to someone who can help out if required).
Raspberry Pi runs mpd music player daemon to receive and decode the internet radio stream.
ALSA running on the Raspberry Pi provides the sound through either the Jack Socket or the HDMI output.
Arduino runs a nanpy interface code to interface with Python, providing Text output of the Radio Station playing and Button inputs to control Playback.
Objectives:
* Learn how to use the mpd/mpc on the Raspberry Pi
* Learn how to use the nanpy library for Python to interface the Pi to the Arduino
* Make a Cool Internet Radio
==============
By the way. If you like this Instructable, you might also like to read My Blog covering various projects and Tutorials. ==============
Step 1: You Will Need
You will need:
* Arduino UNO
* LCD / Keyboard Shield e.g. (http://goo.gl/XAhvx)
* Raspberry Pi
* USB and Ethernet cables
Step 2: Install the Required Packages for Mpd/mpc
The first thing we have to do is update Raspbian and install the required packages. Make sure you're logged in (obviously), and you have an Internet connection.
1. Update Raspbian to the latest packages
$ sudo apt-get update
2. Install the mpd / mpc packages
$ sudo apt-get install mpc mpd
This installs the Music Player Daemon (mpd) and it's client mpc.
You use the mpc client to configure mpd to add radio streams to the playlist, start and stop the player etc.
Step 3: Install the Required Packages for Python-nanpy
We want to be able to talk to Arduino from Python running on the Pi.
To do that, we need to install the nanpy library for Python and the nanpy firmware for Arduino.
1. Install Arduino packages to build the nanpy firmware for Arduino
$ apt-get install arduino
2. Get the nanpy library for Python and extract
from /home/pi
$ wget http://pypi.python.org/packages/source/n/nanpy/nanpy-v0.7.tar.gz
$ tar xvf nanpy-v0.7.tar.gz
3. Get setuptools for Python (a dependancy for nanpy) and extract
$ wget http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz#md5=7df2a529a074f613b509fb44feefe74e
$ tar xvf setuptools-0.6c11.tar.gz
4. Get pyserial for Python (a dependancy for nanpy) and extract
$ wget http://pypi.python.org/packages/source/p/pyserial/pyserial-2.6.tar.gz
$ tar xvf pyserial-2.6.tar.gz
5. Go to the setuptools directory and install Python setuptools
$ cd setuptools-0.6c11
$ sudo python setup.py install
6. Go to the nanpy directory and install the Python nanpy library
$ cd ../nanpy
$ sudo python setup.py install
7. Go to the serial directory and install the Python serial library
$ cd ../pyserial-2.6
$ sudo python setup.py install
Now we've got the files we need let's put the nanpy firmware on the Arduino.
Step 4: Put the Nanpy Firmware on the Arduino
nanpy allows a Python program runing on the raspberry Pi to operate the Arduino using conventional Arduino-Sketch syntax e.g. the Python program to read an analogue input from Arduino might read:
int val = Arduino.analogRead(14)
nanpy has two components:
i) a library for Python that allows Arduino commands to be written in a familiar syntax and communicate with Arduino;
ii) firmware that runs on Arduino, communicating with Python on the Pi
We installed the Python part of nanpy, and downloaded the Arduino part of nanpy on the Pi in the last step.
Now we need to upload the nanpy firmware to Arduino.
Plug Arduino into the USB of the Raspberry Pi.
1. Go to the nanpy firmware directory and upload to Arduino
$ cd ../nanpy/firmware
$ export BOARD=uno
$ make
$ make upload
If you get a report that the device is not found on /dev/ttyACM0 , plug the Arduino into the other USB port.
Step 5: Add Radio Streams to Mpd
Now that we've done all the preliminary installation and setup, it's time to get on to some fun stuff.
Let's start by getting some music playing.
We need to add some radio stations to be played by mpd.
The mpd music player daemon is controlled and configerd by its client, mpc.
Let's add our first Radio Stream and get some music playing.
"Radio Paradise" is the first station we'll add to get us off to a funky-retro start. To do that we use mpc add as follows:
$ cd
$ mpc add http://stream-sd.radioparadise.com:8056
and to play it:
$ mpc play 1
You should now hear Radio Paradise from the Pi and see on the Terminal Window that the station is playing. If you don't hear anything try plugging a speaker or headphones into the Jack Socket.
Congratulations!!
Type mpc help to see other options available to you with mpc.
Other suggested radio streams are:
RTE radio 1: $ mpc add http://icecast2.rte.ie/ieradio1
Monkey Radio: $ mpc add http://76.73.3.245:6969
The Smooth Lounge: $ mpc add http://listen.radionomy.com/the-smooth-lounge
Radio Nova: $ mpc add http://radionova128.media.vistatec.ie:80
Newstalk: $ mpc add http://newstalk.fmstreams.com:8080
=====
Maybe adding stations needs an instructable of it's own, it can be a bit of a treasure hunt :-) See this article for advice http://wiki.slimdevices.com/index.php/Internet_radio
But I'll give you an example to show how I did it :
Go to a site with some radio streams e.g. http://www.listenlive.eu/
and a suitable link from that e.g. Top40: http://www.listenlive.eu/top40.html
Click RIGHT on a link under the "Listen Live" column, looking for URLs that end in .m3u. I chose Q-Music so I RIGHT clicked on the 96kbps link to open the file "http://icecast4.play.cz/evropa2-64.mp3.m3u".
This is a text file so make sure this file is opened with Notepad.
The file contains the line: "http://icecast-qmusic.cdp.triple-it.nl:80/Qmusic_be_live_96.mp3" so the correct URL should be: "http://icecast-qmusic.cdp.triple-it.nl:80"
Other links on the ListenLive site link directly to a URL for streaming; e.g. Alpha Radio: "http://86.57.151.4:8009/listen.pls" , so the URL would be: "http://86.57.151.4:8009"
Step 6: Python Program
Now we have a perfectly good Linux controllable Internet Radio.
But we don't want to stop there. We want to control the Radio from the Buttons on the Arduino and we want to see which Radio Station we're listening to on the LCD display.
To do that we need to write a Python Program running on the Pi that controls the Arduino.
Using nano or your favourite editor enter the Python code from giithub. (I used to have the code below but Instructables editor totally screws up the indenting so it's confusing).
Once entered and saved as radio.py , type
$ python radio. py &
You should now be able to control playback and station selection from the buttons on the Pi and see the selected station on the LCD.
Enjoy!!
UPDATE: jazzi_p merged this radio project with usualpanic.com web radio. You can get the code from github. The menu is added to display ip addess, set the audio port to hdmi/analog or auto. Also added the shutdown option. The volume keys are changed to left and right buttons and also it display's the volume status on the LCD, to change the stations we use up and bottom key. The Select key is used to activate the sub menu. Another option added is to Reload of playlist. Please check the tutorial on usualpanic.com for creating radio_playlist.sh file.
46 Comments
10 years ago on Introduction
Here's Updated Indented code, Enjoy:
from datetime import datetime
from subprocess import *
from time import sleep, strftime
from Queue import Queue
from threading import Thread
import os
from nanpy import Arduino, Lcd
Arduino.pinMode(14, input)
lcd = Lcd([8,9,4,5,6,7],[16,2]) # Setup the LCD pins for the Sainsmart Shield
lcd.printString("Jess's Web Radio",0,0)
lcd.printString("Loading" + "."*3,0,1)
sleep(5)
max_trax = 74
x = 1
loop_menu = 1
loop_radio = 1
def display_ipaddr():
show_wlan0 = "ip addr show wlan0 | cut -d/ -f1 | awk '/inet/ {printf \"w%15.15s\", $2}'"
show_eth0 = "ip addr show eth0 | cut -d/ -f1 | awk '/inet/ {printf \"e%15.15s\", $2}'"
ipaddr = run_cmd(show_eth0)
if ipaddr == "":
ipaddr = run_cmd(show_wlan0)
lcd.printString('IP Address:',0,0)
lcd.printString(ipaddr,0,1)
sleep(2)
def displaymenu():
if x==1:
lcd.printString("1. Display ",0,0)
lcd.printString(" IP Address ",0,1)
elif x==2:
lcd.printString("2. Audio Output ",0,0)
lcd.printString(" to hdmi Port ",0,1)
elif x==3:
lcd.printString("3. Audio Output ",0,0)
lcd.printString(" to Analog port",0,1)
elif x==4:
lcd.printString("4. Audio Output ",0,0)
lcd.printString(" Auto Sel. Port",0,1)
elif x==5:
lcd.printString("5. Reload the ",0,0)
lcd.printString(" Playlist ",0,1)
elif x==6:
lcd.printString("6. ShutDown ",0,0)
lcd.printString(" the System ",0,1)
else:
lcd.printString("7. Exit to ",0,0)
lcd.printString(" Main Menu ",0,1)
def load_playlist():
output = run_cmd("mpc clear")
output = run_cmd("/home/pi/radio_playlist.sh")
def run_cmd(cmd):
p = Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT)
output = p.communicate()[0]
return output
def getKey():
val = Arduino.analogRead(14)
if val == 1023:
return "NONE"
elif val < 100:
return "RIGHT"
elif val < 150:
return "UP"
elif val < 330:
return "DOWN"
elif val < 510:
return "LEFT"
elif val < 750:
return "SEL"
else:
return "KBD_FAULT"
load_playlist()
def getTrack():
#L= [S.strip('\n') for S in os.popen('mpc').readlines()] # Get the Track info from the stdout of the mpc command
output = run_cmd("mpc current")
station = output [0:16] # Pick out the Station and Track info
track = output [-17:-1]
lcd.printString(station + " "*(16 - len(station)), 0, 0)
lcd.printString(track + " "*(16 - len(track)), 0, 1)
track_num = 1 # Start off on Track number 1
os.system("mpc play "+str(track_num)) # Tell the OS to Play it
while loop_radio == 1:
getTrack()
loop_menu = 1
x = 1
key = getKey()
if key == "UP":
track_num += 1
if track_num > max_trax:
track_num = max_trax
os.system("mpc play " + str(track_num))
getTrack()
elif key == "DOWN":
track_num -= 1
if track_num < 1:
track_num = 1
os.system("mpc play " + str(track_num))
getTrack()
elif key == "SEL":
while loop_menu == 1:
displaymenu()
key = getKey()
if key == "RIGHT":
os.system("mpc volume +2")
lcd.printString(16*" ", 0, 0)
lcd.printString(16*" ", 0, 1)
output = run_cmd("mpc volume")
lcd.printString("VOLUME UP:", 0, 0)
lcd.printString(output, 5, 1)
sleep(.25)
lcd.printString(16*" ",0,0)
lcd.printString(16*" ",0,1)
elif key == "LEFT":
os.system("mpc volume -2")
lcd.printString(16*" ",0,0)
lcd.printString(16*" ", 0,1)
output = run_cmd("mpc volume")
lcd.printString("VOLUME DOWN:", 0, 0)
lcd.printString(output, 5, 1)
sleep(.25)
lcd.printString(16*" ",0,0)
lcd.printString(16*" ",0,1)
elif key == "UP":
if x <= 1:
x = 7
else:
x = x - 1
elif key == "DOWN":
if x >= 7:
x = 1
else:
x = x + 1
elif key == "SEL":
if x == 1:
display_ipaddr()
sleep(1)
elif x == 2:
output = run_cmd("amixer -q cset numid=3 2")
lcd.printString("Audio OUT-->HDMI", 0, 0)
lcd.printString("output ", 0, 1)
sleep(.5)
elif x == 3:
output = run_cmd("amixer -q cset numid=3 1")
lcd.printString("Audio OUT->Analog", 0, 0)
lcd.printString("output ", 0, 1)
sleep(.5)
elif x == 4:
output = run_cmd("amixer -q cset numid=3 0")
lcd.printString("Audio OUT-> Auto", 0, 0)
lcd.printString("output ", 0, 1)
sleep(.5)
elif x == 5:
load_playlist()
os.system('mpc play 1')
elif x == 6:
lcd.printString("Good Bye ", 0, 0)
lcd.printString("Have a Nice Day ", 0, 1)
output = run_cmd("mpc clear")
output = run_cmd("sudo shutdown now")
elif x == 7:
loop_menu = 0
getTrack()
break
elif key == "RIGHT":
os.system("mpc volume +2")
lcd.printString(16*" ",0,0)
lcd.printString(16*" ", 0,1)
output = run_cmd("mpc volume")
lcd.printString("VOLUME UP:", 0, 0)
lcd.printString(output, 5, 1)
sleep(.25)
lcd.printString(16*" ",0,0)
lcd.printString(16*" ",0,1)
elif key == "LEFT":
os.system("mpc volume -2")
lcd.printString(16*" ", 0, 0)
lcd.printString(16*" ", 0, 1)
output = run_cmd("mpc volume")
lcd.printString("VOLUME DOWN:", 0, 0)
lcd.printString(output, 5, 1)
sleep(.25)
lcd.printString(16*" ",0,0)
lcd.printString(16*" ",0,1)
Reply 9 years ago on Introduction
Nice projekt have you the code in a file that i can use
with copy & past it brings some errors in a am not a programmer
i also use a Arduino Mega 2560 and the key's dont work :-(
Reply 9 years ago on Introduction
Problems are solved
on the Mega Board the analog 14 Pin is Pin 54
the Python programm is now workung but after starting the program
the Display shows the ip an the loads the first Sender then the Raspberry
crashes :-( an i can only reset it
10 years ago on Introduction
I have merged this radio project with usualpanic.com web radio. The menu is added to display ip addess, set the audio port to hdmi/analog or auto. Also added the shutdown option. The volume keys are changed to left and right buttons and also it display's the volume status on the LCD, to change the stations we use up and bottom key. The Select key is used to activate the sub menu. I will upload the modified python program soon.
Another option added is to Reload of playlist. Please check the tutorial on usualpanic.com for creating radio_playlist.sh file.
4 years ago
Hey guys where can i get the schematic diagram of this project??
7 years ago
Sorry. Compilation error. Now is everythink ok. Thanks anyway.
7 years ago
Almost done.
Uploading to board...
*GUESSING* at serial device: /dev/ttyUSB0
stty -F /dev/ttyUSB0 hupcl
/usr/bin/avrdude -DV -p atmega328p -P /dev/ttyUSB0 -c arduino -b 115200 -U flash:w:Nanpy.hex:i
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f
avrdude: reading input file "Nanpy.hex"
avrdude: ERROR: No valid record found in Intel Hex file "Nanpy.hex"
avrdude: read from file 'Nanpy.hex' failed
avrdude: safemode: Fuses OK (E:00, H:00, L:00)
avrdude done. Thank you.
arduino.mk:315: recipe for target 'upload' failed
make: *** [upload] Error 1
Can you help me, please ?
7 years ago
hey there! is there anyone who has a good working radio.py?
the code from Jazzi_p gave me an error:
pi@raspi:~/nanpy/firmware $ File "radio.py", line 119
sleep(.25)
^
IndentationError: unexpected indent
it would be nice if there is anyone who help me out with it (after years)
i run this on an Raspberry Pi 2
Reply 7 years ago
I fixed the indents on the Pastebin site. The Jazzi_p code should work OK now.
Reply 7 years ago
Hey, I get it to work, but not properly.. The ip shown is a Mac and it hangs and always simulate volume+. Everytime i start up the Pi, I have to add the stream to mpd, if i store them in the playlist file who is wrote in the radio.py mpd can't open even if i add one manually. I edited the py script buttons-value to fit my LCD Keypad Shield but the script goes crazy..
Reply 7 years ago
I got the same error, but if you compile until 118 it play music and change station.
Reply 7 years ago
I fixed the indents on the Pastebin site. The Jazzi_p code should work OK now.
8 years ago
Since I'm using a different brand of the LCD shield (ROBOT LCD SHIELD) I had to change the voltage levels a bit so that the buttons responded with correct commands,
Now I have a problem when pushing the SELECT button, When pushed it displays the first entry in the menu (1. DISPLAYIP address) for a less then a second and switches back to currently playing info so I can access the menu options.
Can someone give me some info on how to resolve this. My programming knowledge is very limited so keep that in mind :)
Thx
Reply 8 years ago
It could be that the ROBOT LCD shield
outputs different levels for the button presses. You can see the values
being output by your shield by loading a program onto your Arduino to
monitor the Analog Input Pin the buttons are connected to. See File:
Examples : Basics : AnalogReadSerial.
Also if you're changing the
compare values in def getKey() to suit your shield it's important that
they are in ascending order e.g. <100, <150, <330 etc..
NOT < 100, <330, <150 etc..
8 years ago on Step 2
Nevermind, raspbian.org is down right now.
8 years ago on Introduction
I see the breadboard, but didn't notice it listed in the parts list or instructions.
8 years ago
Ok so i got the radio playing through my tv via hdmi. But i have no read out on my lcd. I am using the same one that you are.
Can you please help!
8 years ago on Introduction
ok i have done everything up until step 6 ! i can hear the stations playing through my t.v. via hdmi. I am going to have to get a different lcd because it did not come with the control buttons.
Now the kit I have has a ir remote control could i a use that to control the stations or will it be easier with the button controls.
thanks in advance!
Reply 8 years ago on Introduction
You could, but if you're a beginner I think that would be pretty difficult.
8 years ago on Introduction
i have a question, after doing the build can you still use the pi as a computer or do you have to keep it connected as a radio? Sorry I am very new to arduino but I have experience with raspberry pi.