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// Wind Speed Sensor (0-5V Anemometer) - Arduino Example
// Blue signal -> A0 (direct), Brown -> 12V supply, Black -> GND (shared)
// Wind speed (m/s) = Vout x 6   (5V = 30 m/s)

const int windPin = A0;
const int numSamples = 16;

void setup() {
  Serial.begin(9600);
}

void loop() {
  // Average several readings to steady the value in gusty air
  long total = 0;
  for (int i = 0; i < numSamples; i++) {
    total += analogRead(windPin);
    delay(5);
  }
  float raw = total / (float)numSamples;

  // Convert the 10-bit reading (0-1023) to volts (5V reference)
  float volts = raw * (5.0 / 1023.0);

  // Convert volts to wind speed
  float windMs = volts * 6.0;         // meters per second
  float windMph = windMs * 2.237;     // miles per hour

  Serial.print("Signal: ");
  Serial.print(volts, 2);
  Serial.print(" V | Wind: ");
  Serial.print(windMs, 1);
  Serial.print(" m/s (");
  Serial.print(windMph, 1);
  Serial.println(" mph)");

  delay(1000);
}

# Wind Speed Sensor (0-5V Anemometer) - ESP32 MicroPython Example
# Blue signal -> 10k/20k divider -> GPIO 34, Brown -> 12V, Black -> GND (shared)
# Divider scales 5V -> 3.33V, so multiply the measured volts by 1.5

from machine import ADC, Pin
import time

adc = ADC(Pin(34))        # ADC1 channel - keeps working with Wi-Fi on
adc.atten(ADC.ATTN_11DB)  # Full 0-3.3V input range

DIVIDER_RATIO = 1.5       # (10k + 20k) / 20k

while True:
    # Average several readings to steady the value in gusty air
    total_uv = 0
    for _ in range(16):
        total_uv += adc.read_uv()   # calibrated reading in microvolts
        time.sleep_ms(5)
    volts_at_pin = total_uv / 16 / 1_000_000

    # Undo the divider, then convert to wind speed
    signal_volts = volts_at_pin * DIVIDER_RATIO
    wind_ms = signal_volts * 6.0
    wind_mph = wind_ms * 2.237

    print("Signal: {:.2f} V | Wind: {:.1f} m/s ({:.1f} mph)".format(
        signal_volts, wind_ms, wind_mph))
    time.sleep(1)

#!/usr/bin/env python3
# Wind Speed Sensor (0-5V Anemometer) - Raspberry Pi + ADS1115 Example
# Blue signal -> 10k/20k divider -> ADS1115 A0, SDA/SCL -> GPIO 2/3
# Install: pip3 install adafruit-circuitpython-ads1x15

import time
import board
import busio
import adafruit_ads1x15.ads1115 as ADS
from adafruit_ads1x15.analog_in import AnalogIn

DIVIDER_RATIO = 1.5   # (10k + 20k) / 20k

i2c = busio.I2C(board.SCL, board.SDA)
ads = ADS.ADS1115(i2c)
ads.gain = 1          # +/-4.096V range covers the divided 0-3.33V signal
channel = AnalogIn(ads, ADS.P0)

try:
    while True:
        signal_volts = channel.voltage * DIVIDER_RATIO
        wind_ms = signal_volts * 6.0
        wind_mph = wind_ms * 2.237

        print("Signal: {:.2f} V | Wind: {:.1f} m/s ({:.1f} mph)".format(
            signal_volts, wind_ms, wind_mph))
        time.sleep(1)

except KeyboardInterrupt:
    print("Measurement stopped by user")

# Wind Speed Sensor (0-5V Anemometer) - Pico MicroPython Example
# Blue signal -> 10k/20k divider -> GP26 (ADC0), Brown -> 12V, Black -> GND
# Divider scales 5V -> 3.33V, so multiply the measured volts by 1.5

from machine import ADC
import time

adc = ADC(26)                 # GP26 = ADC0
CONVERSION = 3.3 / 65535      # read_u16() spans 0-65535 across 0-3.3V
DIVIDER_RATIO = 1.5           # (10k + 20k) / 20k

while True:
    # Average several readings to steady the value in gusty air
    total = 0
    for _ in range(16):
        total += adc.read_u16()
        time.sleep_ms(5)
    volts_at_pin = (total / 16) * CONVERSION

    signal_volts = volts_at_pin * DIVIDER_RATIO
    wind_ms = signal_volts * 6.0
    wind_mph = wind_ms * 2.237

    print("Signal: {:.2f} V | Wind: {:.1f} m/s ({:.1f} mph)".format(
        signal_volts, wind_ms, wind_mph))
    time.sleep(1)