September 16th, 2024 × #javascript#hardware#hackweek
Receipt Printer with JavaScript
Wes explains how he built a receipt printer with JS during Hack Week at Sentry, including connecting it, encoding printer commands, taking screenshots to print complex layouts when alerts come in from Sentry.
Wes Bos Host
Scott Tolinski Host
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?
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