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* Step 1 : Connect the lines well first,make sure that the RX TX lines connect correctly; * Step 2 : Set the line sequences and bit rate well and save; * After opening the serial port switch,charge the LCD mainboard (The charging order must be correct or there will be no printing information). * Step 4 : Prepare the software interface well and charge the mainboard; ![](https://box.kancloud.cn/4f3534a412b1a5c51557b60076c844df_529x456.png) * Step 5 : The printing information showed. ![](https://box.kancloud.cn/d74179ea927638195cda3d4a65a40410_528x460.png)