arduino thermal printer settings

defines.cpp

// copy this near the top of your sketch!
// change the numbers here to change print settings
// look at your parts kit receipt for numbers that work well with your printer

#define DOTS 4
#define HEAT_TIME 127
#define HEAT_INTERVAL 64
#define PRINT_DENSITY 1
#define PRINT_TIMEOUT 3

settings.cpp

// copy this into your setup() function, after Thermal.begin(BAUD);

// set the print speed and heat
Thermal.write(27);  // ASCII ESC (tell the printer we're sending a command)
Thermal.write(55);  // print settings command! (next 3 bytes are settings)
Thermal.write(DOTS);   // default 64 = 8*('7'+1)
Thermal.write(HEAT_TIME); // default 80 or 800us
Thermal.write(HEAT_INTERVAL); // default 2 or 20us

// set the print density and timeout
Thermal.write(18);  // ASCII DC2 (data control 2 -- printer-defined)
Thermal.write(35);  // more settings command! (next byte is settings)
Thermal.write((byte)((PRINT_DENSITY<<5) | PRINT_TIMEOUT));