Raindrop Detection Sensor Module Rain Sensor for Arduino

Product Description

An adjustable rain detection sensor module featuring a high-conductivity weather-treated sensing pad, ideal for automated weather monitoring and home automation in Arduino and ESP32 projects. This complete sensory system includes a spacious dual-sided sensing plate paired with a dedicated comparison control board that accurately converts analog moisture levels into clear digital or analog signals. The sensing board features nickel-plated surface lines to resist oxidation and improve durability against exposure to outdoor environments. Outfitted with an onboard potentiometer on the control hub, developers can effortlessly adjust the humidity and droplet detection threshold, allowing systems to automatically activate motorized wipers, close open windows, or update cloud-based weather tracking portals the moment precipitation begins.

Pinout / Layout Connections

The module breaks out its tracking interface using two sets of terminal connectors:

Sensor Plate Interface (2-Pin Header):

• Positive / Negative Pins: Connect via a 2-wire jumper cable directly to the matching 2-pin input header on the control driver board (non-polarized).

Control Driver Breakout Interface (4-Pin Male Header):

• VCC Pin: Connects to the +3.3V to +5V DC positive power supply line.

• GND Pin: Connects to the common system ground (0V) reference.

• DO (Digital Output) Pin: Digital TTL switching output. Outputs a HIGH logic level when dry and switches to a LOW logic level when water droplets bridge the sensing traces.

• AO (Analog Output) Pin: Analog output voltage terminal (0V to VCC) that drops proportionally as the volume of moisture on the plate increases.

Applications

• Smart Home Automation: Perfect for building automated window-closing mechanisms, smart retractable awnings, and outdoor clotheslines that pull back during rain events.

• Automated Weather Stations: Excellent for logging weather trends, triggering environmental alarms, and feeding live localized rain data into smart agriculture networks.

• Automated Vehicle Wipers: Ideal for designing responsive scale-model windshield wipers or adjusting speed cycles on simulated automotive mechanisms.

Compatibility

The Rain Detection Sensor Module outputs both universal analog and digital logic signals, making it fully compatible with:

• Arduino Board Series (Uno, Mega, Nano, Pro Micro) using analogRead() or digital pin interrupts.

• ESP32 and ESP8266 boards (Compatible with native 3.3V digital input lines and ADC pins).

• Raspberry Pi and Raspberry Pi Pico (Using the digital pin or via an external ADC module like the ADS1115 for analog readings).

• Standard Industrial PLCs configured for standard low-voltage logic monitoring.

Technical Specifications

What’s in the Box

• 1 x Weather-Treated Rain Sensing Plate Board.

• 1 x LM393 Comparator Control Driver Module.

• 1 x 2-Pin Female-to-Female DuPont Ribbon Cable.