When I attempt to run the install as per the reference manual (python s2a_fm.py /dev/ttyACM0) the RX LED on my Arduino Mega blinks rapidly but then I get the following exception: serial.serialutil.SerialException: Attempting to use a port that is not open.
As far as I can tell I did not skip an installation step. Attached is the terminal output for the complete messages.

Hi,

During test, I found one TYPO in HTTP response header.
Please refer below my local patch.

In scratch_http_server.py
$ git diff scratch_http_server.py
diff --git a/scratch_http_server.py b/scratch_http_server.py
index e8337da..ec763b7 100644
--- a/scratch_http_server.py
+++ b/scratch_http_server.py
@@ -104,7 +104,7 @@ class GetHandler(BaseHTTPRequestHandler):
# http_response = str(response + calf)
http_response = "HTTP/1.1 200 OK" + calf
http_response += "Content-Type: text/html; charset=ISO-8859-1" + calf
- http_response += "Content-Length" + str(len(response)) + calf
+ http_response += "Content-Length: " + str(len(response)) + calf
http_response += "Access-Control-Allow-Origin: *" + calf
http_response += calf
#add the response to the nonsense above

Regards,

Hello,
I am getting 100% CPU usage when I start the script. It Starts aber the Board was detected and does not end, even though the script is more or less idling and waiting for scratch to start.
Using it on Arch Linux, but should not make a huge difference!
Greetings,
Mirko

French translation needs to be added.

I already have an italian translation for your Scratch extension for Arduino. According to your instructions I provided a new file s2a_fm_It.s2e and have modified xlate.cfg.

How can I provide these files to you?

Firstly, many thanks for s2a_fm. I'm about to start using it as a first step in robotics for some 10 years olds. A few issues cropped up in my preparation which I thought I'd share and you can incorporate if you wish.

The Arduino's have USB serial numbers which mean that they enumerate on unique COM ports on windows. To aid startup I needed a batch file which finds the right COM port and passes it in to s2a_fm. Batch files really aren't my thing, but here's what I've done:

for /f "tokens=4 delims=: " %%A in ('mode ^| findstr "COM[0-9]*:"') do c:\python27\python.exe s2a_fm.py %%A

This strips the colon from the first COM port found and passes it in to s2a_fm. It works for me because I've no built in COM ports. If you know of a better way, including it in the extra goodies would be great.

This is the original issue from @sobreira reported in s2aio issue #8:

Hi MrYsLab.
I'd really like to thank you for great work, in fact we try to widespread the knownledge about your creation for lots of schools in Brazil.
We still use the Python 2.7 and I try to connect the HC-SR04.
I followed all steps above mentioned however Scratch or Snap can´t read any information from the sensor.

To make a test, I have installed the new Python and I did what you asked on your comment from25 Jul.
By this worked fine well, however, back to PyMata, Python 2.7 and s2a_fm, the Sonar not work.

For all the other other things, the system performs as expected.

I really appreciate your help on this.

Thanks!

Edson
hackeduca.com

On Mac OS X, I can't get this working.

Any suggestions?

python s2a_fm.py /dev/tty.usbmodemfd121

s2a_fm version 1.3 Copyright(C) 2013-14 Alan Yorinks All Rights Reserved

Opening Arduino Serial port /dev/tty.usbmodemfd121
Please wait while Arduino is being detected. This can take up to 30 seconds ...
Board Auto Discovery Failed!, Shutting Down
Exception in thread Thread-1:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 808, in __bootstrap_inner
self.run()
File "/Library/Python/2.7/site-packages/PyMata/pymata_serial.py", line 99, in run
if self.arduino.inWaiting():
File "/Library/Python/2.7/site-packages/serial/serialposix.py", line 449, in inWaiting
s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)

IOError: [Errno 9] Bad file descriptor

Hi again,

Scratch2 starts using floating point at the drop of a hat, so if a user scales down an analog input (10 bit int) to an 8 bit value for PWM output the result is a floating point value. Scratch2 does have a 'round' function which can be used, but I think it would be good if s2a_fm also handled this. I had a quick look and the PWM case could be handled by changing line 454 of scratch_command_handlers.py from

            self.firmata.analog_write(pin, int(command[self.CMD_VALUE]))

to

            self.firmata.analog_write(pin, int(float(command[self.CMD_VALUE])))

There may be a more Python way of doing this, what do you think?

Thanks
Dave

s2a_fm version 1.5   Copyright(C) 2013-14 Alan Yorinks    All Rights Reserved 

Python Version 2.7.10 (v2.7.10:15c95b7d81dc, May 23 2015, 09:33:12) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]

PyMata version 2.10  Copyright(C) 2013-15 Alan Yorinks    All rights reserved.

Opening Arduino Serial port /dev/tty.usbmodem1411 

Please wait while Arduino is being detected. This can take up to 30 seconds ...
Board Auto Discovery Failed!, Shutting Down
Traceback (most recent call last):
  File "./s2a_fm.py", line 145, in <module>
    s2a_fm()
  File "./s2a_fm.py", line 80, in s2a_fm
    firmata.analog_mapping_query()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyMata/pymata.py", line 216, in analog_mapping_query
    self._command_handler.send_sysex(self._command_handler.ANALOG_MAPPING_QUERY, None)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyMata/pymata_command_handler.py", line 619, in send_sysex
    self.pymata.transport.write(data)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyMata/pymata_serial.py", line 107, in write
    self.arduino.write(data)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/serial/serialposix.py", line 490, in write
    if not self._isOpen: raise portNotOpenError
serial.serialutil.SerialException: Attempting to use a port that is not open

Seems I cannot communicate with the board. Using the same tty I can upload code to Arduino via Arduino app.

file loaded: s2a_fm_base

A script containing custom blocks (enable digital pin and digital writes) headed by a green flag only works when clicking the whole block but not the green flag. Same happens with other green flag blocks. Also it is not possible to open or create a new file without closing first the application.

Versions:

• OSX 10.9.1
• Arduino UNO with Standard Firmata uploaded.
• Scratch 2 v385
• Python 2.7.6

Hi, You should use the Release feature on Github to package your releases.