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Plant Moisture Sensor Probe Humidity Wifi Wireless ESP Bluetooth Hygrometer Temperature

ESP32 Development Board WiFi Bluetooth CP2102 30-Pin ESP32-WROOM Compatible
ESP8266 WeMos D1 MINI ESP-12E IoT WiFi Wireless Board Arduino IDE Compatible
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Description

Enhance Your Plant Care with Our Smart Plant Moisture Sensor Probe – Monitor Humidity and Temperature Wirelessly!

Discover the ultimate plant care solution with our cutting-edge Plant Moisture Sensor Probe. Engineered for plant enthusiasts, gardeners, and botany aficionados, this advanced device offers seamless monitoring of soil humidity and temperature, all conveniently accessible through WiFi and Bluetooth connectivity.

Key Features:

  1. ESP32 Bluetooth WiFi Development Board: Seamlessly compatible with Nodumcu and Arduino platforms, providing you with versatile programming options to suit your preferences.
  2. Precise DHT11 Temperature and Humidity Sensor: Stay informed about your plant’s environment, as this sensor accurately measures temperature and humidity levels, empowering you to make well-informed decisions for optimal growth.
  3. Efficient CP2104 Communication Chip USB TO TTL: Benefit from reliable and efficient communication, ensuring smooth data transmission between your device and the sensor probe.
  4. Convenient Micro USB Port: Easily connect and power up your device using the Micro USB port, streamlining the setup process.
  5. Long Soil Probe for Comprehensive Monitoring: Gain deeper insights into your plant’s well-being with the extended soil probe, enabling precise temperature and humidity detection throughout the root zone.
  6. 18650 Lithium Battery Holder Compatibility: Power your device effortlessly with the 18650 Lithium Battery Holder (Battery not included), ensuring uninterrupted monitoring even in areas with limited power access.
  7. Compact and Practical Design: With dimensions of 19.4x3cm (7.64×1.18inch), our sensor probe is designed for convenience, seamlessly fitting into your plant care routine.

Package Includes:

  • 1 x ESP32 WiFi & Bluetooth CP2104 DHT11 Soil Temperature Humidity Sensor
  • 1 x 18650 Battery Base

Elevate your plant care approach with data-driven insights. Order our Plant Moisture Sensor Probe today and embark on a journey to healthier, more vibrant plants. Experience the future of gardening technology!

📌 Code Examples & Usage – Plant Moisture Sensor (WiFi / Bluetooth / ESP Compatible)

📋 Overview

This plant moisture (soil humidity) sensor probe measures the moisture content of soil and outputs a signal that can be read by a microcontroller such as ESP8266 / ESP32 / Arduino.

It is commonly used for:

  • Smart plant watering systems

  • Garden & indoor plant monitoring

  • Automated irrigation projects

  • Wi-Fi / Bluetooth plant dashboards

  • Educational STEM projects

📌 Moisture sensors are best used for relative moisture tracking, not absolute scientific measurements.

⚙ Key Features

  • Measurement type: Soil moisture / humidity

  • Output: Analog and/or Digital (module dependent)

  • Supply voltage: 3.3V – 5V

  • Compatible with ESP8266 / ESP32 / Arduino

  • Can be paired with Wi-Fi or Bluetooth projects

  • Simple interface

⚠ IMPORTANT – Read Before Use

⚠ This is a resistive soil moisture probe
⚠ Continuous power in wet soil will cause corrosion over time

✔ Best practices:

  • Power the sensor only when taking a reading

  • Use short measurement intervals

  • Avoid leaving powered 24/7

  • For long-term outdoor use, consider capacitive moisture sensors

🔌 Pinout & Wiring

Typical Sensor Pins

Pin Function
VCC Power (3.3V–5V)
GND Ground
AO Analog output (moisture level)
DO Digital output (threshold-based, optional)

📌 Most projects use AO (analog output).

🔌 Wiring – Arduino Uno

Sensor Arduino Uno
VCC 5V
GND GND
AO A0

🔌 Wiring – ESP32 / ESP8266

ESP ADC inputs are 3.3V max.

Sensor ESP32
VCC 3.3V (recommended)
GND GND
AO GPIO34 (ESP32 example)

📌 Powering the sensor from 3.3V helps reduce corrosion and protects the ADC.

🧪 1️⃣ Basic Analog Read Example (Arduino)

const int moisturePin = A0;

void setup() {
Serial.begin(9600);
}

void loop() {
int value = analogRead(moisturePin);

Serial.print("Moisture raw value: ");
Serial.println(value);

delay(1000);
}

🧪 2️⃣ ESP32 Analog Read Example

const int moisturePin = 34;

void setup() {
Serial.begin(115200);
}

void loop() {
int value = analogRead(moisturePin);

Serial.print("Moisture raw value: ");
Serial.println(value);

delay(1000);
}

📊 3️⃣ Convert Reading to Percentage (Calibrated)

You should calibrate for your soil type.

Example:

  • Dry soil ≈ 3000

  • Wet soil ≈ 1200

int raw = analogRead(moisturePin);
int percent = map(raw, 3000, 1200, 0, 100);
percent = constrain(percent, 0, 100);

Serial.print("Soil moisture: ");
Serial.print(percent);
Serial.println("%");

📌 Values vary by soil, probe depth, and composition.

💧 4️⃣ Automatic Watering Trigger Example

const int moisturePin = 34;
const int relayPin = 26;

void setup() {
pinMode(relayPin, OUTPUT);
digitalWrite(relayPin, LOW);
}

void loop() {
int moisture = analogRead(moisturePin);

if (moisture > 2800) { // soil dry
digitalWrite(relayPin, HIGH); // water ON
} else {
digitalWrite(relayPin, LOW); // water OFF
}

delay(5000);
}

📡 5️⃣ Wi-Fi / Bluetooth Integration Ideas

This sensor pairs well with:

  • ESP8266 / ESP32

  • MQTT dashboards

  • Home Assistant

  • Web-based monitoring pages

  • Bluetooth phone apps

Typical flow:

  1. Read moisture value

  2. Send via Wi-Fi / BLE

  3. Log or display on phone or dashboard

🧠 Calibration Tips (Very Important)

✔ Insert probe to the same depth every time
✔ Calibrate using:

  • Completely dry soil

  • Fully watered soil
    ✔ Average multiple readings
    ✔ Avoid measuring immediately after watering

📌 Calibration makes the difference between “toy” and “useful”.

🔧 Common Issues & Fixes

Issue Cause Fix
Readings drift Probe corrosion Power only during reads
Always wet Shorted probe Clean probe
ESP32 wrong values Overvoltage Use 3.3V
Large jumps Soil inconsistency Average readings

Additional information

Weight 100 g
Dimensions 260 × 160 × 20 mm

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