ESP32 DHT11 WiFi and Bluetooth Temperature, Humidity & Soil Moisture Sensor with 18650 Battery Holder – ESP32 Smart Plant Sensor

The ESP32 DHT11 WiFi and Bluetooth Temperature, Humidity & Soil Moisture Sensor with 18650 Battery Holder reads all three measurements, processes them on the dual-core ESP32 processor, and transmits results over WiFi to a dashboard or over Bluetooth to a smartphone app without a separate gateway device in between. Three sensors and a wireless microcontroller sit on one 194 x 30 mm PCB in this module — a DHT11 for air temperature and relative humidity, a capacitive soil moisture sensor for soil water content, and an ESP32 handling WiFi and Bluetooth data transmission

The capacitive soil moisture sensor measures water content by detecting changes in the dielectric constant of the surrounding soil — it does not pass current through the soil the way resistive sensors do, so the metal electrode does not corrode over repeated measurements in wet ground. The esp32 soil moisture sensor analog output connects directly to the ESP32 ADC, giving a graduated moisture reading rather than a simple wet/dry threshold. DHT11 measures air temperature from 0°C to 50°C and humidity from 20% to 90% RH with the limitations typical of DHT11 — suitable for monitoring trends and ranges rather than laboratory-grade precision readings.

The onboard 18650 Li-Ion cell holder accepts a single 3.7V cell, allowing the module to operate outdoors or away from a mains socket without USB power. The esp32 dht11 wifi bluetooth humidity sensor 18650 combination makes the module self-contained — slot in a charged 18650 cell and the module measures and transmits without any other hardware. Programming uses the CP2102 USB-to-UART chip through Micro USB, compatible with Arduino IDE and ESP-IDF on the same port. The esp32 plant moisture sensor 194 x 30 mm form factor suits push-in pot or planter installation.

Related Product:

• Explore Humidity, Temperature and Heat Sensor
• Checkout Capacitive Soil Moisture Sensor

Features:

• Onboard sensors — DHT11 air temperature/humidity and capacitive soil moisture
• Capacitive soil sensing avoids electrode corrosion in continuous wet soil deployment
• 18650 cell holder enables wire-free battery-powered outdoor sensor operation
• CP2102 USB-to-UART programs module through Micro USB with Arduino IDE

Technical Specifications:

Applications:

• ESP32 DHT11 Sensor monitors smart greenhouse plant temperature and humidity environments.
• ESP32 soil moisture sensor transmits water level data to dashboards.
• ESP32 dht11 wifi and bluetooth sensor tracks indoor plant humidity and temperature.
• Soil moisture sensor triggers automated irrigation relays below configured moisture thresholds.
• ESP32 sensor with 18650 holder supports standalone outdoor garden monitoring.

Package Include:

• 1 x ESP32 DHT11 WiFi and Bluetooth Temperature, Humidity & Soil Moisture Sensor with 18650 Battery Holder