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Life & fun · September 2, 2025

I Made an ESP32 On-Call Beeper

I built a retro-style beeper (pager) for Sentry

I Made an ESP32 On-Call Beeper launched on September 2, 2025 with 6 votes, #3,421 of 8,160 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.

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What it does

I recently joined Sentry , and landed just in time to join their annual Hack Week . Every year, Sentry employees are encouraged to spend one week working on a passion project. A common theme is folks adding new and interesting features to the product that they otherwise would not have had time to work on. The Sentry Alert TX-1 is an ESP32 -powered device that receives alerts over MQTT , using a webhook bridge to connect with Sentry to notify you when your apps or services are experiencing issues. A true on-call pager. I started hearing about Hack Week about a month before it started, and took the time to not only come up with the idea, but decide on the hardware, and begin the design work.…from techsquidtv.com

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