首先，执行easy_install pyserial。python程序，向串口写一个数字。
import serials = serial.Serial()
s.port = 3
s.baudrate = 9600
s.stopbits = 1
s.open()
#print sprint s.readline().strip()
s.write('10')
print s.readline().strip()
执行easy_install docopt，生活更美好。python程序版本0.2。
'''talk with arduinousage:arduino.py <num>options:-h --help-v --version
'''
from docopt import docoptimport serialif __name__ == '__main__':arguments = docopt(__doc__, version='0.2')try:num = arguments['<num>']int(num)except ValueError as e:print 'argument must be a integer, from 1 to 254'exit(-1)s = serial.Serial()s.port = 3s.baudrate = 9600s.stopbits = 1s.open()#print sprint s.readline().strip()s.write(num)print s.readline().strip()s.close()
arduino从串口读入呼吸灯亮度的退化值1～254。
int pin = 9;
int stay = 5;void setup () { pinMode(pin, OUTPUT); Serial.begin(9600);Serial.println(":-] hi");delay(300);
}void loop () {int _stay = 0;while (Serial.available()) {char in = Serial.read();//Serial.println(in); continue;if (in >= 48 && in <= 57) {_stay = _stay * 10 + (in - 48);} else {_stay = 0;break;}}if (_stay != stay && _stay > 0 && _stay < 255) {stay = _stay;Serial.println(stay); }for(int fade = 0 ; fade <= 255; fade += stay) { analogWrite(pin, fade); delay(30); } for(int fade = 255 ; fade >= 0; fade -= stay) { analogWrite(pin, fade);delay(30); }
}
done! enjoy it