update

MPPT/read.py

@@ -0,0 +1,12 @@
+import serial
+
+def read_vedirect(port='/dev/serial0', baudrate=19200):
+    ser = serial.Serial(port, baudrate, timeout=1)
+    
+    while True:
+        line = ser.readline().decode('utf-8', errors='ignore').strip()
+        if line:
+            print(line)  # Raw data from Victron
+
+if __name__ == "__main__":
+    read_vedirect()

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 gpiozero --break-system-packages
+sudo pip3 install pyserial requests RPi.GPIO adafruit-circuitpython-bme280 crcmod psutil ntplib pytz gpiozero adafruit-circuitpython-ads1x15 numpy --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

windMeter/read_wind_direction.py

@@ -0,0 +1,84 @@
+'''
+ __        _____ _   _ ____  
+ \ \      / /_ _| \ | |  _ \ 
+  \ \ /\ / / | ||  \| | | | |
+   \ 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)  -> ADS1115 (module I2C) 
+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.
+
+sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/windMeter/read_wind_direction.py
+
+'''
+import time
+import board
+import busio
+import adafruit_ads1x15.ads1115 as ADS
+from adafruit_ads1x15.analog_in import AnalogIn
+
+# Create the I2C bus and ADC object
+i2c = busio.I2C(board.SCL, board.SDA)
+ads = ADS.ADS1115(i2c)
+
+# Connect to the channel with your Davis wind vane
+wind_dir_sensor = AnalogIn(ads, ADS.P0)
+
+# Check the current voltage range
+min_voltage = 9999
+max_voltage = -9999
+
+def get_wind_direction():
+    """Get wind direction angle from Davis Vantage Pro2 wind vane"""
+    global min_voltage, max_voltage
+    
+    # Read voltage from ADS1115
+    voltage = wind_dir_sensor.voltage
+    
+    # Update min/max for calibration
+    if voltage < min_voltage:
+        min_voltage = voltage
+    if voltage > max_voltage:
+        max_voltage = voltage
+    
+    # We'll use a safer mapping approach
+    # Assuming the Davis sensor is linear from 0° to 360°
+    estimated_max = 3.859 # Initial estimate, will refine
+    
+    # Calculate angle with bounds checking
+    angle = (voltage / estimated_max) * 360.0
+    
+    # Ensure angle is in 0-360 range
+    angle = angle % 360
+    
+    return voltage, angle
+
+# Main loop
+try:
+    print("Reading wind direction. Press Ctrl+C to exit.")
+    print("Voltage, Angle, Min Voltage, Max Voltage")
+    while True:
+        voltage, angle = get_wind_direction()
+        print(f"{voltage:.3f}V, {angle:.1f}°, {min_voltage:.3f}V, {max_voltage:.3f}V")
+        time.sleep(1)
+except KeyboardInterrupt:
+    print("\nProgram stopped")
+    print(f"Observed voltage range: {min_voltage:.3f}V to {max_voltage:.3f}V")
+    
+    # Suggest calibration if we have enough data
+    if max_voltage > min_voltage:
+        print("\nSuggested calibration for your setup:")
+        print(f"max_voltage = {max_voltage:.3f}")
+        print(f"def get_wind_direction():")
+        print(f"    voltage = wind_dir_sensor.voltage")
+        print(f"    angle = (voltage / {max_voltage:.3f}) * 360.0")
+        print(f"    return angle % 360")

windMeter/read_wind_speed.py

@@ -11,13 +11,13 @@ https://www.shapemaker.io/blog/wind-speed-measurements-with-anemometer-and-a-ras
 
 Connexion:
 black (wind speed )     -> gpio21
-green (wind direction)  -> gpio20
+green (wind direction)  -> ADS1115 (module I2C) 
 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
+sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/windMeter/read_wind_speed.py
 
 '''