Merlin's Keeper Merlin's Keeper

About Merlin's Keeper

Merlin's Keeper is a web-based monitoring platform for exotic animal keepers. It connects to purpose-built sensor devices placed inside vivariums and terrariums, providing live temperature and humidity readings, historical graphs, and a full care log for every animal in your collection.

The Devices

Tiny Keeper
A compact two-sensor unit for vivariums and terrariums. Reads temperature and humidity from two independent probes and uploads readings every 20 minutes.
  • 2 × temperature + humidity sensors
  • Upload interval: 20 minutes
  • No line outputs
  • Wi-Fi (ESP32)
Merlin's Keeper ST
The full-featured unit with three sensor channels and six controllable line outputs for heating, lighting and humidity equipment. Uploads every 10 minutes.
  • 3 × temperature + humidity sensors
  • Upload interval: 10 minutes
  • 6 × line outputs
  • Wi-Fi (ESP32)
Merlin's Keeper PC
A dedicated relay controller for vivarium automation. Receives commands over the local network and switches heating, misting, fan and lighting equipment on or off in response. Operates independently of the web platform for reliable local control.
  • 6 × configurable outputs
  • 128×64 OLED status display
  • Local HTTP control API
  • Wi-Fi (ESP32-S3)

Platform Features

🌡️
Live Monitoring

Real-time sensor readings updated on every device upload, with configurable high and low alert thresholds.

📈
Historical Graphs

24-hour, 7-day and 30-day trend graphs for temperature and humidity on every device.

🐍
Animal Tracking

Log feeding, moulting, medical events and photos. Full event history and calendar view across all animals.

🔔
Email Alerts

Receive an email when readings breach your configured thresholds, with a 4-hour cooldown to avoid spam.

📚
Care Guides

Community-maintained husbandry guides covering temperatures, humidity, feeding and vivarium setup — free to read, no account needed.

🔒
Secure & Private

All sensor data is encrypted in transit using AES-256-GCM. Your animals and readings are only visible to you.

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