MyWindSensor

[Bert Ramselaar]

Made een Windsensor for MySensors, Works well!
used an adafruit https://www.adafruit.com/product/1733 windmeter.

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * versie 1.1 bert ramselaar  
 * Used an UNO with a NRF24+ with external antenna
 *
 * DESCRIPTION
 * Arduino Wind Sensor
 * Adafruit Anemometer Wind Speed Sensor -> https://www.adafruit.com/product/1733
 * connect the sensor as follows :
 *   VCC  (brown)      >>> 5V
 *   A    (blue)      >>> A0 or any other analog pin
 *   GND  (black)      >>> GND
 *

 *
 */

// Enable debug prints
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

#include <MySensors.h>

#define CHILD_ID_WIND 0
#define WIND_SENSOR_ANALOG_PIN 0

unsigned long SLEEP_TIME = 2000; // Sleep time between reads (in milliseconds)

// VARIABLES
float W_Raw_A0 = 0; // stores the RAW value coming from the sensor 0 to 1023
float W_Volt = 0; // stores voltage calculated form A0
float W_WindSpeed = 0; // Windspeed in meters per second (m/s)
float W_WindSpeed_last = 0; // previus Windspeed sended
float W_Voltage_Conversion = .004882814; //This constant maps the value provided from the analog read function, which ranges from 0 to 1023, to actual voltage, which ranges from 0V to 5V
float W_voltageMin = .4; // Mininum output voltage from anemometer in mV.
float W_voltageMax = 2.0; // Maximum output voltage from anemometer in mV.
float W_windSpeedMin = 0; // Wind speed in meters/sec corresponding to minimum voltage
float W_windSpeedMax = 32; // Wind speed in meters/sec corresponding to maximum voltage
int W_beaufort = 0; // Calculated beaufort scale

MyMessage windMsg(CHILD_ID_WIND, V_WIND);

void presentation()
{
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Wind Sensor", "1.1");

  // Register all sensors to gateway (they will be created as child devices)
  present(CHILD_ID_WIND, S_WIND);
}

void loop()
{
  W_Raw_A0 = analogRead(WIND_SENSOR_ANALOG_PIN); // Get WIND value from A0
  W_Volt = W_Raw_A0 * W_Voltage_Conversion; //Convert sensor value to actual voltage

//Convert voltage value to wind speed using range of max and min voltages and wind speed for the anemometer
if (W_Volt <= W_voltageMin)
{
 W_WindSpeed = 0; //Check if voltage is below minimum value. If so, set wind speed to zero.
}
else 
{
  // calculate winspeed in Meters per Second 
  W_WindSpeed = (W_Volt - W_voltageMin) * W_windSpeedMax / (W_voltageMax - W_voltageMin); //For voltages above minimum value, use the linear relationship to calculate wind speed.
  // corrected // ~~W_WindSpeed = W_WindSpeed * 3.6 // convert from m/s to km/h~~
}

  Serial.print("Raw Signal Value (0-1023): ");
  Serial.print(W_Raw_A0);

  Serial.print(" - Voltage: ");
  Serial.print(W_Volt);

  Serial.print(" - Windspeed M/S: ");
  Serial.print(W_WindSpeed); // unit: M/S

  Serial.print(" - Beaufort: ");
  Serial.println(beaufort()); // unit: beaufort scale

  if (ceil(W_WindSpeed) != W_WindSpeed_last) 
  {
**/// CHANGED convert float to de nearest integer and converted (W_WindSpeed * 3.6) to km/h ///**
send(windMsg.set((int16_t)ceil(W_WindSpeed * 3.6))); 
 W_WindSpeed_last = ceil(W_WindSpeed);

    //beaufort(); // option windspeed in beafort
    //send(windMsg.set(W_beaufort)); // option windspeed in beafort
  }

  sleep(SLEEP_TIME);
}

int beaufort(void)
{ 
    if (W_WindSpeed < 0.39)
    {
    W_beaufort = 0;
    return W_beaufort;
    } 
    else if (W_WindSpeed >= 0.3 & W_WindSpeed <= 1.5)
    {
    W_beaufort = 1;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 1.6 & W_WindSpeed <= 3.3)
    {
    W_beaufort = 2;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 3.4 & W_WindSpeed <= 5.4)
    {
    W_beaufort = 3;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 5.5 & W_WindSpeed <= 7.9)
    {
    W_beaufort = 4;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 8.0 & W_WindSpeed <= 10.7)
    {
    W_beaufort = 5;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 10.8 & W_WindSpeed <= 13.8)
    {
    W_beaufort = 6;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 13.9 & W_WindSpeed <= 17.1)
    {
    W_beaufort = 7;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 17.2 & W_WindSpeed <= 20.7)
    {
    W_beaufort = 8;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 20.8 & W_WindSpeed <= 24.4)
    {
    W_beaufort = 9;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 24.5 & W_WindSpeed <= 28.4)
    {
    W_beaufort = 10;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 28.5 & W_WindSpeed <= 32.6)
    {
    W_beaufort = 11;
    return W_beaufort;
    }
    else if (W_WindSpeed >= 32.7)
    {
    W_beaufort = 12;
    return W_beaufort;
    }
 }

[Yveaux]

@Bert-Ramselaar HI and welcome to the forum!
I modified your post slightly to include code tags, which improves readability.
Could you give some more info on your project (which sensor did you use? And did I mention that we simply looooove pictures ;-))?

[gohan]

@Yveaux He actually posted the link to the sensor :)
It is rather expensive but since it isn't a pulse counter sensor but it gives a voltage to read it is probably why it isn't cheap.

[Yveaux]

@gohan @Bert-Ramselaar sorry, I'd better not browse the forum on my phone anymore :grimacing:

[Yveaux]

@gohan said in MyWindSensor:

since it isn't a pulse counter sensor but it gives a voltage to read it is probably why it isn't cheap

A simple pro-mini can do the same; only costs a few €...
Looks like it's full metal, so probably a lot more durable than the plastic ones that tend to agree rapidly in the sun...