I built a "fail-closed" watchdog platform for ESP32
Hey everyone, just wanted to share a tool I built to solve a personal headache. I got tired of setting up custom DBs/backends just to track if my ESP32s were actually online or if they just silently crashed/froze.
I built Qrystal Uplink – it’s basically an external "dead man's switch" for MCUs.
How it works: You drop the C++ library in your firmware. It sends a signed heartbeat.
The catch: If the cloud stops hearing from your device (power loss, infinite loop, WiFi drop), it alerts you immediately. No data ingestion required.
I just launched the public beta on Product Hunt today. If anyone here has a messy fleet of ESPs and wants to test the library, I'd love your feedback on the API design!
https://www.producthunt.com/products/qrystal-uplink?launch=qrystal-uplink
I built Qrystal Uplink – it’s basically an external "dead man's switch" for MCUs.
How it works: You drop the C++ library in your firmware. It sends a signed heartbeat.
The catch: If the cloud stops hearing from your device (power loss, infinite loop, WiFi drop), it alerts you immediately. No data ingestion required.
I just launched the public beta on Product Hunt today. If anyone here has a messy fleet of ESPs and wants to test the library, I'd love your feedback on the API design!
https://www.producthunt.com/products/qrystal-uplink?launch=qrystal-uplink
Product Hunt
Stop building custom backends to track IoT uptime. Qrystal Uplink is a cloud-based watchdog for ESP32 & embedded fleets. We use "fail-closed" logic: if your device goes silent (crash, power loss, freeze), we alert you instantly via Email (as well as Slack, Telegram, etc. in the future). Replace weeks of infrastructure work with 5 minutes of inte...
