I'm developing an embedded project and I need to connect Arduino and Raspberry pi because I want to control Arduino with Raspberry Pi over the serial port. My question is how can I get the Arduino port in Linux dynamicaly with python?
My python program will loop sending commands to Arduino and I don't want to lose communication if someone connects and disconnects the Arduino.
Thanks for any help. Zulin
1st install Pyserial
if you have connected you arduino with you pc, you can see all serial message:
sudo screen /dev/ttyAMC0
now come to python to control arduino:
import serial
ser = serial.Serial('/dev/ttyACM0', 9600)
ser.write("something") # this will write "your stuff" to Arduino serial.
now using Cprogram you can read from serial what the input is. And you can command your arduino using python
C pogram to read from Serial and write to serial:
char a[10];
void setup()
{
Serial.begin(9600);
}
void loop()
{
if(Serial.available()>0)
{
Serial.readBytes(a,10);
Serial.println(a);
}
}
You can do it like this:
def get_serial_port():
return "/dev/"+os.popen("dmesg | egrep ttyACM | cut -f3 -d: | tail -n1").read().strip()
Then you can just connect with arduino doing:
device = serial.Serial(get_serial_port(), baudrate=9600, timeout=3)
(assuming you are using the default rate 9600, you can just change the params...)
