Logic Analyzer

Simple DIY project

Arduino sketch and Processing client

https://create.arduino.cc/projecthub/vincenzo-g/diy-logic-analyzer-f61ee5

Arduino sketch and client on browser with HTML5 and JavaScript

https://www.instructables.com/id/Arduinolyzerjs-Turn-your-Arduino-into-a-Logic-Anal/

Soarer's Logic Analyer for Teensy

https://deskthority.net/viewtopic.php?f=7&t=4567

Arduino sketch that suppors SUMP protocol

https://hackaday.io/project/1633-arduino-generic-logic-analyzer

https://github.com/gillham/logic_analyzer

https://www.element14.com/community/people/jancumps/blog/2015/03/13/make-a-logic-analyzer-from-your-dev-kit-part-1-arduino-uno

SUMP protocol

https://www.sump.org/projects/analyzer/protocol/

SUMP client

https://www.lxtreme.nl/ols/

sigrok Pulse View

https://sigrok.org/wiki/PulseView