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7. Command Set
No. Command Hex Code Function Description
1 LF 0A Prints out buffer and advances one line
2 ESC J n 1B 4A n Prints out buffer and advances n lines
18<=n<=FF
3 ESC 2 1B 32 Sets line space to 1/6 inch or 30 dots
4 ESC 3 n 1B 33 n Sets line space to n dots, n=30 default
0B<=n<=FF
5 ESC ! n 1B 21 n Sets fond size, n=00 default
n=00, 10, n=10 double height
20, 30 n=20 double width
n=30 double height and double width (This
command gets overridden by ESC DC4
command.)
6 ESC SO 1B 0E Sets double width printing for all characters
subsequent to the command in a line (This
command gets overridden by LF, CR, or ESC
DC4 command.)
7 ESC DC4 1B 14 Resets to default font size
8 ESC c 5 n 1B 63 35 n Enables Feed & Online buttons n=00 default
00<=n<=01 Disables Feed & Online buttons n=01
(The buttons get enabled automatically when
paper roll being loaded.)
9 ESC * m n1 1B 2A m n1 Sets dot matrix
n2 d1…dx n2 d1…dx m=01 8 dots double density
m=01, 21 m=21 24 dots double density
00<=n1<=FFn1+256*n2 total number of horizontal dots
n2=00, 01 d=1 to print the dot
00<=d<=FF d=0 not to print the dot
x denotes the data number
x=n1+256*n2 when m=01
x=(n1+256*n2)*3 when m=21
10 ESC @ 1B 40 Initializes printer and sets all defaults
11 ESC p 1B 70 m Controls cash drawer
m n1 n2 n1 n2 n1 is the time for attracting micro-switch
m=00 n2 is the time for starting next attractive
01<n1<=n2 command, attractive time interval=n1*2ms,
n1<=n2<FF response time interval=n2*2ms
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