Details
Encode ASCII string to a Version-1 QR code of this ASCII-art format, where all the v and ^ must be filled with "#" and spaces.
####### vv^^ #######
# # vv^^ # #
# ### # #vv^^ # ### #
# ### # vv^^ # ### #
# ### # vv^^ # ### #
# # vv^^ # #
####### # # # #######
#vv^^
### #####vv^^## #
vv^^vv ^^vv^^vv^^vv^^
vv^^vv#^^vv^^vv^^vv^^
vv^^vv ^^vv^^vv^^vv^^
vv^^vv#^^vv^^vv^^vv^^
#vv^^vv^^vv^^
####### #vv^^vv^^vv^^
# # #vv^^vv^^vv^^
# ### # #vv^^vv^^vv^^
# ### # vv^^vv^^vv^^
# ### # #vv^^vv^^vv^^
# # #vv^^vv^^vv^^
####### #vv^^vv^^vv^^
The 10 vertical "strips" of ^^ or vv must be written from right to left. The bits in a strip are written in a zig-zag order: ^^ zig-zags upwards, and vv zig-zags downwards. The bit on the right always precedes the one on its left.
^^ .. vv 10
^^ 98 vv 32
^^ 76 vv 54
^^ 54 vv 76
^^ 32 vv 98
^^ 10 vv ..
The strips are filled with data from a bitstream:
0100 00010001 01001000 01100101 ... 01101111 0000 11000000 11111111 ... 11101110
Enc Length 'H' 'e' 'o' End c0 ff ee
(4) (17) (17-byte ASCII message) (0) (7 error correction bytes)
To encode a bit from the bitstream to a strip, determine the coordinates (x, y) of the current position in the bitmap with the origin (0, 0) at the top-left corner, invert the bit if (x+y)%2 = 0, and write the value to this position ("#" = 1, space = 0).
External links: Wikipedia