822: Receipt Printer with JavaScript
Sep 16, 2024•20 min
Episode description
Wes unveils his Hack-Week project —a thermal printer controlled by JavaScript that prints out Sentry.io errors in real-time. Scott and Wes dive into the nitty-gritty of how it works, from the ESC/POS protocol to tackling socket issues, and whether the project was worth the effort.
Show Notes- 00:00 Welcome to Syntax!
- 00:38 Brought to you by Sentry.io.
- 01:10 What is Hack Week?
- 01:41 The project.
- 02:40 Why a receipt printer?
- 03:55 How do these printers work?
- 05:20 Communicating with the printer.
- 07:24 ESC/POS Encoder.
- ESC/POS Encoder.
- 08:42 Socket issues.
- 09:56 Using Transformers.js to stop ‘toxic comments’.
- 10:48 Back to socket issues.
- 12:18 Integrating with Sentry.
- 15:01 Printing images with Playwright.
- 16:17 Was it worth it?
Syntax: X Instagram Tiktok LinkedIn Threads
Wes: X Instagram Tiktok LinkedIn Threads