When you access the web server, L Chika with Arduino

I think that this kind of thing makes both cats and scoops, but I wrote it using a web framework called bottle.py and pySerial. Since it is possible that the content is on the Web and the hardware is localhost, the ʻAccess-Control-Allow-Origin` header is added to support CORS (Cross-Origin Resource Sharing).

import serial
import sys
from bottle import response,route,run

try:
    ser = serial.Serial('/dev/tty.usbmodem1451',9600)
except OSError:
    ser = False
except:
    print sys.exc_info()[0]
    raise

@route('/arduino/<command>')
def arduino(command):
    response.set_header('Access-Control-Allow-Origin','*')
    if ser:
        ser.write(command)
        line = ser.readline()
        return line
    else:
        return "arduino is not connected"

run(host="localhost",port=8946,debug=True)

When the arduino side receives the character string "1" serially, it lights up for 1 second.

byte c = 0;
 
void setup(){
  Serial.begin(9600);
  pinMode(13,OUTPUT);
}
 
void loop(){
  while (Serial.available()){
    c = (int)Serial.read();
    //Serial.flush();
    switch(c){
      case 49://1
        digitalWrite(13,HIGH);
        delay(1000);
        digitalWrite(13,LOW);
        break;
    }
  }
}

Both bottle.py and pySerial can be installed with pip on Mac.

pip install bottle
pip install pyserial

• Addition * I registered on Github https://github.com/usopyon/bottle_serial