Water consumption is a critical factor in animal health, hygiene, and farm resource management. By equipping different barn sections with simple water flow sensors connected to a Raspberry Pi, farmers can automatically track daily usage and link it directly to Odoo. This provides transparency and allows for early detection of irregularities.

Required Hardware

• Raspberry Pi (Model 3B or 4)
• Water flow sensor (e.g., YF-S201 with pulse output)
• Resistor (10kΩ) for signal stabilization (recommended)
• Wi-Fi connection to Odoo (Community or Enterprise edition)

How It Works

The flow sensor measures water usage by generating pulses (e.g., 450 pulses per liter with YF-S201). A Python script on the Raspberry Pi counts the pulses per barn section and converts them into liters. The values are then transmitted daily to Odoo, where they are logged and assigned to the correct section.

Example Python Script

import RPi.GPIO as GPIO
import time
import requests
from datetime import datetime

FLOW_SENSOR_PIN = 23
IMPULSES_PER_LITER = 450
total_pulses = 0

GPIO.setmode(GPIO.BCM)
GPIO.setup(FLOW_SENSOR_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def count_pulse(channel):
    global total_pulses
    total_pulses += 1

GPIO.add_event_detect(FLOW_SENSOR_PIN, GPIO.FALLING, callback=count_pulse)

def send_to_odoo(liters, section_id):
    data = {
        'section_id': section_id,
        'liters': round(liters, 2),
        'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
    }
    headers = {'Authorization': 'Bearer your_api_token'}
    requests.post('http://your-odoo.com/api/water_log', json=data, headers=headers)

try:
    print("Measurement started. Press CTRL+C to stop.")
    start = time.time()
    while True:
        time.sleep(10)
        duration = time.time() - start
        liters = total_pulses / IMPULSES_PER_LITER
        print(f"Water consumption: {liters:.2f} L in {duration:.1f} seconds")
        send_to_odoo(liters, section_id=1)
        total_pulses = 0
        start = time.time()

except KeyboardInterrupt:
    GPIO.cleanup()
    print("Measurement stopped.")

Wiring Water Flow Sensor to Raspberry Pi

• VCC → Pin 2 (5V)
• GND → Pin 6 (Ground)
• Signal → GPIO23 (Pin 16)

Benefits and Recommendations

This solution helps farmers track and optimize water usage in real time. With data centralized in Odoo, it becomes easier to spot unusual patterns, prevent leaks, and ensure animals always have sufficient water. Integrating dashboards and alerts makes resource management even more effective.

Conclusion

Automating water consumption monitoring in barns with Raspberry Pi and Odoo reduces manual checks and enhances animal welfare. It also supports sustainable farming by ensuring efficient use of water resources.

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