Running PiFm

[John Miller]

Hello! I am still getting used to Raspberry Pi. But, I have a breadboard hooked up via an Adafruit T-Cobbler, and have run a blink.py test, which has worked.

Now, I am trying to use your group's PiFm module: http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter

I have opened up a terminal, changed directory to Pifm, done sudo python and import PiFm, which worked.

Next is where I am having a problem, when I enter PiFm.play_sound("sound.wav"), I get this:

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "PiFm.py", line 7, in play_sound

    call(["./pifm", filename])

  File "/usr/lib/python2.7/subprocess.py", line 522, in call

    return Popen(*popenargs, **kwargs).wait()

  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__

    errread, errwrite)

  File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child

    raise child_exception

OSError: [Errno 13] Permission denied

If you could please help me with this, I would appreciate it.

Thank you!

For reference, here is the full list from my open terminal:

pi@raspberrypi:~ $ cd Pifm

pi@raspberrypi:~/Pifm $ sudo python

Python 2.7.9 (default, Sep 17 2016, 20:26:04) 

[GCC 4.9.2] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import PiFm

>>> PiFm.play_sound("sound.wav")

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "PiFm.py", line 7, in play_sound

    call(["./pifm", filename])

  File "/usr/lib/python2.7/subprocess.py", line 522, in call

    return Popen(*popenargs, **kwargs).wait()

  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__

    errread, errwrite)

  File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child

    raise child_exception

OSError: [Errno 13] Permission denied

>>> 

John Miller

Raspbian Jessie with Pixel

Raspberry Pi 2 Model B

[Oliver Mattos]

Sudo chmod +x pifm
Should fix that error

But...   I think pifm only works on the raspberry pi 1.  Pi2 and pi3 don't work, although I think there are forks of my project which do.

Hope that helps
Oliver

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[John Miller]

Oliver,

Oh, okay. So, the original Raspberry Pi with the 26-pin GPIO is the only one this will run on?

If that is the case, do you know where to find those forks of your project that would run on a Raspberry Pi 2?

Thank you again for your help, and for creating this!

I was thinking of maybe getting a first-generation Pi, since they are still available through Canakit. I have a GPIO extension board that came in a prototyping kit that would work with the Pi 1. So, I could put that, and your original code to use!

John Miller

Raspbian Jessie with Pixel

Raspberry Pi 2 Model B

[Oliver Mattos]

This project looks better:

https://github.com/ChristopheJacquet/PiFmRds

[John Miller]

Thank you! Very cool. I will read through it.

I appreciate your help with this. I look forward to making a Pi FM Transmitter happen. :-)