From 283a46eb0b0e382a28e3734675f360dab8363b5e Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Mon, 10 Mar 2025 17:44:03 +0100
Subject: [PATCH] update

---
 README.md                    |  2 +-
 windMeter/read_wind_speed.py | 67 ++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 windMeter/read_wind_speed.py

diff --git a/README.md b/README.md
index 99b3f46..ab0d3c1 100755
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Line by line installation.
 ```
 sudo apt update
 sudo apt install git gh apache2 php php-sqlite3 python3 python3-pip jq autossh i2c-tools python3-smbus -y
-sudo pip3 install pyserial requests RPi.GPIO adafruit-circuitpython-bme280 crcmod psutil ntplib pytz --break-system-packages
+sudo pip3 install pyserial requests RPi.GPIO adafruit-circuitpython-bme280 crcmod psutil ntplib pytz gpiozero --break-system-packages
 sudo mkdir -p /var/www/.ssh
 sudo ssh-keygen -t rsa -b 4096 -f /var/www/.ssh/id_rsa -N ""
 sudo ssh-copy-id -i /var/www/.ssh/id_rsa.pub -p 50221 airlab_server1@aircarto.fr
diff --git a/windMeter/read_wind_speed.py b/windMeter/read_wind_speed.py
new file mode 100644
index 0000000..41b481b
--- /dev/null
+++ b/windMeter/read_wind_speed.py
@@ -0,0 +1,67 @@
+'''
+ __        _____ _   _ ____  
+ \ \      / /_ _| \ | |  _ \ 
+  \ \ /\ / / | ||  \| | | | |
+   \ V  V /  | || |\  | |_| |
+    \_/\_/  |___|_| \_|____/ 
+                             
+
+Script to read wind speed from a Davis Anémomètre-girouette Vantage Pro (6410)
+https://www.shapemaker.io/blog/wind-speed-measurements-with-anemometer-and-a-raspberry-pi
+
+Connexion:
+black (wind speed )     -> gpio21
+green (wind direction)  -> gpio20
+Yellow                  -> 5v
+RED                     -> GND
+
+Attention:  The Raspberry Pi doesn't have analog inputs, so we need an analog-to-digital converter (ADC) to read the wind direction.
+
+/usr/bin/python3 /var/www/nebuleair_pro_4g/windMeter/read_wind_speed.py
+
+'''
+
+
+import time
+from gpiozero import Button
+from signal import pause
+
+# Setup wind speed sensor on GPIO pin 21 (instead of 5)
+wind_speed_sensor = Button(21)
+wind_count = 0
+
+def spin():
+    global wind_count
+    wind_count = wind_count + 1
+
+def calc_speed(spins, interval):
+    # Davis anemometer formula: V = P*(2.25/T) in MPH
+    # P = pulses per sample period, T = sample period in seconds
+    wind_speed_mph = spins * (2.25 / interval)
+    return wind_speed_mph
+
+def reset_wind():
+    global wind_count
+    wind_count = 0
+
+# Register the event handler for the sensor
+wind_speed_sensor.when_pressed = spin
+
+try:
+    print("Wind speed measurement started. Press Ctrl+C to exit.")
+    
+    while True:
+        # Reset the counter
+        reset_wind()
+        
+        # Wait for 3 seconds and count rotations
+        print("Measuring for 3 seconds...")
+        time.sleep(3)
+        
+        # Calculate and display wind speed
+        wind_speed = calc_speed(wind_count, 3)
+        print(f"Wind count: {wind_count} spins")
+        print(f"Wind speed: {wind_speed:.2f} mph ({wind_speed * 1.60934:.2f} km/h)")
+        
+except KeyboardInterrupt:
+    print("\nMeasurement stopped by user")
\ No newline at end of file