The made its first whimpers today:

Test printouts on receipt paper strewn on a desk

Two strips of receipt paper printed with blurry images

Had to deal with some Windows printer drivers and PHP configuration to get things off the ground, then elbow-deep into the escpos library to determine the features of this particular thermal printer.

Validated various font modes, printed a swath of misinterpreted control codes, and eventually even got one-bit photo printing to work successfully.

Dithering bits!

Photo portrait printed on receipt paper

Today's progress was made possible by:  Deadmau5;  also more Deadmau5.