6fc08fded2
It works in a similar way as a monochrome print, but with few differences: 1. User needs to send 3 rows of color bitstrings for each image row. 2. Printer will stay in place while printing all 3 non-white 'colors', it will feed the paper each third line. 3. User must multiply height by 3. 4. Command is different: cmd[0] == ASCII_GS && cmd[1] == 118 && cmd[2] == 49 E.g. For image 200x200, user needs to send header with width 200, height 600. Image data is arranged the following way (fourth color is blank): 25 bytes (200bits) of 1st color for first row 25 bytes (200bits) of 2nd color for first row 25 bytes (200bits) of 3rd color for first row 25 bytes (200bits) of 1st color for second row 25 bytes (200bits) of 2nd color for second row ...etc...
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
- 0 = 8x16
- 1 = 5x7
- 2 = 6x12
- 3 = 7x14
- 4 = 8x16
unicode font size
- 0 = 12x12
- 1 = 14x14
- 2 = 16x16
- 3 = 18x18
- 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 ΕΙΝΑΙ Ο ΘΕΟΣ ΓΕΩΜΕΤΡΗΣ" > /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