The user draws in an HTML5 Canvas object which is read by a Java Web Server. From there it gets converted to serial commands for an Arduino which controls the steppers with two EasyDrivers.

That is, 01 in the ttf file needs to be 80 hex sent to the FPGA. Arduino supplies a Java class file to do the task, but I got frustrated because the class file needed Java 11 and I didn’t want ...

Arduino is a popular brand of open-source microcontrollers ... including C/C++, HTML/CSS, Java, Javascript, jQuery, Perl, and Python, directly on the Debian-based Raspberry Pi OS loaded on the ...