How To: Program Epson TM-T20 Printers (serial interface)
First, simultaneously turn the unit On + Hold the Feed button for one second.
Hold Feed one more time
3x + Hold – “Customize Value Settings”
4x + Hold – “Serial Interface Settings”
1x + Hold – “Baudrate”
4x + Hold – “Serial Interface Settings”
1x + Hold – “Baudrate”
3x + Hold – “9600”
4x + Hold – “Serial Interface Settings”
2x + Hold – “Parity”
3x + Hold – “Even”
4x + Hold – “Serial Interface Settings”
3x + Hold – “Handshaking”
2x + Hold – “XON/XOFF”
Hold – Exit
Hold – Exit