Moisture Sensor Readings for Flipper Zero

A Flipper Zero application that reads values from a Capacitive Moisture Sensor v1.2.

Screenshots

Sensor View	Calibration Menu

Features

• Real-time moisture percentage display (0-100%)
• Visual moisture bar indicator
• Status text (Very Dry, Dry, Moist, Wet, Very Wet)
• Millivolt and raw ADC value display
• Averaged readings for stability
• In-app calibration menu with persistent storage

Hardware Requirements

• Flipper Zero
• Capacitive Moisture Sensor v1.2 (link)

Wiring

Connect the sensor to the Flipper Zero GPIO header:

Sensor Pin	Flipper Zero Pin
VCC	Pin 9 (3.3V)
GND	Pin 18 (GND)
AOUT	Pin 16 (PC3)

Building

make build

Installation

make install

Or build and launch directly:

make launch

Development

make format   # Format code
make lint     # Lint code
make clean    # Clean build artifacts

Usage

1. Connect the moisture sensor to your Flipper Zero
2. Navigate to Apps > GPIO > Moisture Sensor
3. The display shows:
   • Moisture percentage
   • Status indicator
   • Millivolt reading and raw ADC value
4. Press Left to open calibration menu
5. Press Back to exit

Calibration

Press Left to open the calibration menu:

• Dry / Wet - Adjust ADC values (±50 per step)
• Reset - Restore factory defaults (Dry: 3650, Wet: 1700)
• Save - Save calibration values

Calibration values persist across restarts.