Calling python script from Arduino Yun using Process.h

Question

I'm a newbie in Arduino and trying to check my python script in Arduino is running or not.

I placed the python script(sample.py) in /mnt/sda1/arduino/www/ which is in SD card.

From the scratch file, I wrote it like below,

Process p;

void setup() {
  // put your setup code here, to run once:
  Bridge.begin();
  Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:
  p.runShellCommandAsynchronously("/usr/bin/python -U /mnt/sda1/arduino/www/sample.py");
  while(p.running());
  if(p.available()>0){
    userInput = p.read();
    Serial.println(userInput);
  }
}

And here is my python script code(sample.py) on below,

import serial

ser = serial.Serial('COM5', baudrate = 115200, timeout=1)
ser.write('g')

What I'm trying to do here is checking my python script is running. However, it shows nothing on Serial monitor.

What am I doing wrong here..?

Can Anybody help me out here??

Or can anybody give me an example code(scratch code) to check python script is running or not?

Thanks in advance.

Is that arduino UNO? If yes, then what kind? what's the clock and memory, what microcontroller does it use (Atmega328??)? Please add more details! — Ubdus Samad, Jan 02 '18 at 06:02
@UbdusSamad I'm using Arduino Yun. and plugged sd card on the YUN. I'm trying to check my python script from SD card runs appropriately or not. :) Thanks for replying! :) — paulc1111, Jan 02 '18 at 06:04
Also , in sample.py , replace the last line with `while 1 : ser.write('g')` — Ubdus Samad, Jan 02 '18 at 06:04
Ah, actually I solved my question.. haha.. I was soooooo stupid.. I don't have to use Serial package in the python code. — paulc1111, Jan 02 '18 at 06:06
I just checked with creating text file. like `file = open(full-path, "w")` `file.write("Hello World")` `file.close()` and it worked creating text file in the path that I wrote in full path! :) — paulc1111, Jan 02 '18 at 06:07
So you directly use print? And please answer your own question formally by writing an answer below! — Ubdus Samad, Jan 02 '18 at 06:08

score 1 · Answer 1 · edited Jan 02 '18 at 06:14

1

OK, I made a mistake, I thought I had to use serial package for checking my python script runs or not. Rather, I just used below code for checking.

file = open("/mnt/sda1/arduino/www/testfile.txt", "w")

file.write("Hello World")

file.close()

Be careful that we have to use full path!!

If you don't, then it will not create a text file.

edited Jan 02 '18 at 06:14

Ubdus Samad

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answered Jan 02 '18 at 06:11

paulc1111

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Calling python script from Arduino Yun using Process.h

1 Answers1