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.
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?

All links available at https://syntax.fm/822

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Mubashir Hassan

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Community Picks

A developer shares his experience of creating a receipt printer using JavaScript during a hack week at Sentry. The project involved connecting a thermal printer to a local network and handling data transmission through TCP sockets. He used Node.js for server-side operations and employed HTML, CSS, and the Playwright tool to format and print data. The printer was set up to receive error notifications from Sentry, showcasing the potential for combining hardware projects with web development.

Receipt Printer with JavaScript