说明：  07年售饭机的成品电路板图。采用485通讯协议。用户可根据自己需要进行电路板图的修改单片机附近的走线，建议不要修改。影响系统的稳定性
(07 Shoufan machine finished circuit board diagram. 485 communication protocol used. Users can map their own need for changes to the board walk near the line of SCM, it is recommended not to change. Affect the stability of the system)