https://github.com/bocaletto-luca/soilmoisurelogger
SoilMoisureLogger Arduino - An autonomous data‐logger that measures soil moisture with a capacitive sensor at regular intervals (and on‐demand via a push‐button), timestamps each reading using a DS3231 RTC, and appends entries to a CSV file on a microSD card. Perfect for greenhouse monitoring or unattended field deployments. By Bocaletto Luca.
https://github.com/bocaletto-luca/soilmoisurelogger
bocaletto-luca cpp logger openhardware opensource soil-moisture soil-moisure-logger standalone
Last synced: 8 months ago
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SoilMoisureLogger Arduino - An autonomous data‐logger that measures soil moisture with a capacitive sensor at regular intervals (and on‐demand via a push‐button), timestamps each reading using a DS3231 RTC, and appends entries to a CSV file on a microSD card. Perfect for greenhouse monitoring or unattended field deployments. By Bocaletto Luca.
- Host: GitHub
- URL: https://github.com/bocaletto-luca/soilmoisurelogger
- Owner: bocaletto-luca
- License: gpl-3.0
- Created: 2025-06-12T23:39:43.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2025-06-12T23:58:57.000Z (about 1 year ago)
- Last Synced: 2025-06-13T00:35:20.863Z (about 1 year ago)
- Topics: bocaletto-luca, cpp, logger, openhardware, opensource, soil-moisture, soil-moisure-logger, standalone
- Language: C++
- Homepage: https://bocaletto-luca.github.io/
- Size: 0 Bytes
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Soil Moisture Logger with RTC & SD Card
#### Author: Bocaletto Luca
**Files**
- `README.md`
- `SoilMoistureLogger.ino`
## 1. Concept
An autonomous data‐logger that measures soil moisture with a capacitive sensor at regular intervals (and on‐demand via a push‐button), timestamps each reading using a DS3231 RTC, and appends entries to a CSV file on a microSD card. Perfect for greenhouse monitoring or unattended field deployments.
## 2. Bill of Materials
- Arduino Uno (or Nano)
- Capacitive soil moisture sensor (e.g. Chirp or SEN0193)
- DS3231 RTC module
- Micro SD card module + 4 GB (or larger) microSD card
- Push‐button + 10 kΩ pull‐down resistor
- Status LED (optional) + 220 Ω resistor
- Breadboard & jumper wires
- 5 V power supply (USB or battery pack)
## 3. Wiring Diagram
Capacitive Sensor Arduino Uno
┌─────────────┐ ┌─────────┐
│ VCC ───► 5V │ │ │
│ GND ───► GND│ │ │
│ AOUT ──► A0 │ │ │
└─────────────┘ └─────────┘
DS3231 RTC (I2C)
┌─────────────┐
│ SDA ───► A4 │
│ SCL ───► A5 │
│ VCC ───► 5V │
│ GND ───► GND│
└─────────────┘
SD Card Module (SPI)
┌─────────────┐ ┌──────────┐
│ CS ───► D10│ │ │
│ MOSI ─► D11│ │ │
│ MISO ─► D12│ │ │
│ SCK ─► D13│ │ │
│ VCC ───► 5V │ │ │
│ GND ───► GND│ │ │
└─────────────┘ └──────────┘
Push‐button Arduino Uno
┌─────────┐ ┌─────────┐
│ one leg─┬─► D2 │ │
│ other ──┴─► GND │ │
└─────────┘ └─────────┘
(Use 10 kΩ from D2 to GND for pull‐down)
Optional LED
┌─────────┐ ┌─────────┐
│ Anode ─┬─► D8 │ │
│ Cath. ─┴─► GND │ │
└─────────┘ └─────────┘
(Include 220 Ω resistor in series)
## 4. Software Setup
1. Install Arduino IDE (≥1.8.x).
2. In Library Manager, install:
- **RTClib** by Adafruit
- **SD** (built-in)
3. Create folder `SoilMoistureLogger` and save both files.
4. Open `SoilMoistureLogger.ino` in the IDE.
5. The logger writes `soil_log.csv` on the SD root with columns: timestamp,moisture 2025-06-20 14:00:00,412
6. Automatic readings every 10 minutes; press the button to force a manual reading.
7. LED blinks once on each log.
---
Say **continua** when you’re ready for project #9!
6. Select **Arduino Uno** and the correct COM port.
## 5. Usage
1. Format your SD card as FAT32.
2. Ensure `RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));` is commented out after initial time‐set.
3. Upload sketch.
4. Open Serial Monitor at 9600 baud to follow status messages.
5. The logger writes `soil_log.csv` on the SD root with columns: