Apollo Automation - Apollo PLT-1B Plant Sensor for Home Assistant (battery version)

General Overview

The Ultimate Plant Sensor Apollo PLT-1B is an advanced tool designed for home automation and gardening enthusiasts. It provides detailed monitoring of the environmental conditions of indoor plants.

With its capacitive probe protected by a conformal coating, the PLT-1B ensures high precision and enhanced durability compared to standard sensors. When paired with Home Assistant via ESPHome, it allows you to trigger automations for watering, light management, or temperature control.

Key Features

• Soil moisture measurement with high precision capacitive sensor
• Monitoring of air temperature and humidity
• Detection of ambient light (LUX) and UV
• Optional monitoring of soil temperature with a waterproof probe
• Visual alerts via configurable RGB LED (water levels, light, etc.)
• Sound alerts with piezoelectric buzzer
• Possible automations (watering, light control, climate, etc.)
• Full integration into Home Assistant via ESPHome
• Available in two different versions: powered by USB-C or battery (18650) with up to 6 months of autonomy.
• Soil temperature probe (optional) for increased accuracy.

Technical Specifications

• Integrated sensors:
  • Soil moisture: capacitive sensor with conformal coating.
  • Air temperature and humidity: AHT20-F dust-resistant sensor.
  • Brightness and UV: LTR390 sensor.
  • Soil temperature (optional): DS18B20 waterproof probe (20 cm).
• Versions: with 18650 battery (not included)
• Autonomy: up to 6 months with default settings
• Power supply: rechargeable 18650 battery (not provided) or external power supply
• Connectivity: Wi-Fi, ESPHome, Home Assistant.
• Alerts and signaling: addressable RGB LED and sound buzzer.
• Dimensions:
  • Without battery: 41 × 26 × 14 mm (probe 77 mm).
  • With battery: slightly larger.
• Indoor use only (not waterproof).