w mx
于之前基础上增加功能：py启动后输入缩放比例，十秒内未输入，则初始化后重启py，方可按默认设置执行
Dependencies: MQTT SDFileSystem WIZnet_Library mbed
Fork of
Laser_SD_W5500
by 
YX ZHANG
Revisions of mqtt_laser.py
| Revision | Date | Message | Actions |
|---|---|---|---|
| 7:4c80e598d08c | 2018-07-23 | save to file; | File Diff Annotate |
| 6:48c44bebe8fb | 2018-07-23 | add Python script | File Diff Annotate |