and I got a question when I run my Python code. I installed Python 2.7 on Windows 7, bit 64. I got an error "No module named serial" when I compiled my code: import serial ser = serial.Serial("COM5", 9600) ser.write("Hello world") x = ser.readline() print(x) I tried many ways to crack this problem, such as installed Canopy to setup virtual environment, make sure 'pip' is there, no Python v 3.x installed. But still cannot get it out. Continue reading...