DevTerm/Code/thermal_printer/README.md

DevTerm Thermal printer

Console commands example

echo "Hello DevTerm" > /tmp/DEVTERM_PRINTER_IN

echo -e "Hello DevTerm\n\n\n\n\n\n" > /tmp/DEVTERM_PRINTER_IN

cat file.txt > /tmp/DEVTERM_PRINTER_IN

ncal -hb | tee > /tmp/DEVTERM_PRINTER_IN

Eos/Pos commands example

ESC ! n

set printer font index,n:0-4
echo -en "\x1d\x21\x0" > /tmp/DEVTERM_PRINTER_IN
echo -en "\x1d\x21\x1" > /tmp/DEVTERM_PRINTER_IN
echo -en "\x1d\x21\x2" > /tmp/DEVTERM_PRINTER_IN
echo -en "\x1d\x21\x3" > /tmp/DEVTERM_PRINTER_IN
echo -en "\x1d\x21\x4" > /tmp/DEVTERM_PRINTER_IN

ascii font size

1. 0 = 8x16
2. 1 = 5x7
3. 2 = 6x12
4. 3 = 7x14
5. 4 = 8x16

unicode font size

1. 0 = 12x12
2. 1 = 14x14
3. 2 = 16x16
4. 3 = 18x18
5. 4 = 20x20

81addc7f4b/Code/thermal_printer/devterm_thermal_printer.c (L381)

DC2 # n

n:0-F, set printer printing density

echo -en "\x12\x23\x8" > /tmp/DEVTERM_PRINTER_IN

DC2 T

print the test page
echo -en "\x12\x54" > /tmp/DEVTERM_PRINTER_IN

UNICODE

Edit /usr/local/etc/devterm-printer ,point to an existed ttf file,eg: TTF=/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc

then restart devterm-printer.service with

sudo systemctl restart devterm-printer

devterm-printer daemon will auto detect the ttf font file

switch to UNICODE MODE

echo -en "\x1b\x21\x1" > /tmp/DEVTERM_PRINTER_IN  

switch back to default ASCII mode

echo -en "\x1b\x21\x0" > /tmp/DEVTERM_PRINTER_IN  

then

echo "日月火水木金土" > /tmp/DEVTERM_PRINTER_IN

to print unicode characters

ESC V n rotation command,unicode mode only

echo -en "\x1b\x56\x0" >/tmp/DEVTERM_PRINTER_IN disable rotation

echo -en "\x1b\x56\x1" >/tmp/DEVTERM_PRINTER_IN 90 degree
echo -en "\x1b\x56\x2" >/tmp/DEVTERM_PRINTER_IN 180 degree
echo -en "\x1b\x56\x3" >/tmp/DEVTERM_PRINTER_IN 270 degree

How to run it from source

• make
• sudo systemctl stop devterm-printer
• sudo cp -rf devterm_thermal_printer.elf /usr/local/bin
• sudo systemctl start devterm-printer