Qrystal Uplink – Cloud-based watchdog for monitoring IoT device uptime

Summary: Qrystal Uplink is a cloud service that monitors the uptime of ESP32 and embedded device fleets by detecting device silence due to crashes, power loss, or freezes. It sends instant alerts via Email and plans to support Slack and Telegram. The platform eliminates the need for custom backend infrastructure with minimal integration effort.

What it does

Qrystal Uplink uses "fail-closed" logic to detect when devices stop communicating and immediately notifies users. It provides official SDKs for ESP32 (Arduino, ESP-IDF) and MicroPython, enabling integration with one line of code and no server management.

Who it's for

It is designed for developers and teams managing ESP32-based IoT fleets who need a reliable uptime monitoring solution without building custom backend infrastructure.

Why it matters

It solves the challenge of tracking device health externally, preventing silent failures that traditional data stream monitoring can miss, and reduces weeks of infrastructure setup to minutes.