VPD Thermometer Hygrometer

Ayk OS

About this app

VPD Monitor by Ayk OS — thermometer, hygrometer and VPD app for indoor grow and plant cultivation. Reads temperature and humidity in real time from compatible Bluetooth sensors (BLE Advertising & GATT), calculates vapor pressure deficit (VPD) and other growth indicators, and shows climate status for rooms and curing jars.

KEY FEATURES:
• Phase-based monitoring: early/late vegetative, early/late flower, drying and curing.
• Multi-slot curing: up to 6 curing containers/jars at once, each with its own sensor slot and status.
• VPD & dew point: automatic vapor pressure deficit plus transpiration and nutrient-uptake indicators.
• Visual status feedback: instant cues (e.g. “Temperature: optimal”, “Humidity: optimal”).
• Bluetooth local or gateway: direct BLE or via compatible Shelly gateways on your LAN.
• Multilingual: German, English, Spanish and Dutch.

SUPPORTED SENSORS (BLE / GATT):
Plug & Play (no flashing):
• SwitchBot Indoor/Outdoor Thermo-Hygrometer (recommended)
• SwitchBot Meter & Meter Plus (many sensors in parallel)
• Xiaomi Mijia 2 (LYWSD03MMC, original firmware): Android limits often max. ~5–7 sensors at once
Custom / Flash:
• Xiaomi Mijia 2 with ATC/PVVX firmware: many sensors without GATT limit (flashing e.g. via Telink required)

From first leaf through controlled drying to jar curing — keep temperature, humidity and VPD in check with VPD Monitor.