import serial

# 设置串口参数
ser1 = serial.Serial('COM1', 9600)
ser2 = serial.Serial('COM2', 9600)

# 发送数据到串口1
ser1.write(b'Hello from COM1')

# 发送数据到串口2
ser2.write(b'Hello from COM2')

# 读取串口1的数据
data1 = ser1.read(10)
print(data1)

# 读取串口2的数据
data2 = ser2.read(10)
print(data2)

# 关闭串口
ser1.close()
ser2.close()