iFix RT809F - Operation Step

4.15.3 Operation Step
 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;
 Step 3 : 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;