Hi!
I require your help regarding a problem I’m encountering.
I built a weather station. esp32 board was used in this project. I used a hall sensor with a magnet in the wind speed measuring part (ANEMOMETER). Previously the method I used was when 20 counts of magnet counted by the hall sensor, it will count the time for 20 counts and output the average wind speed. Code worked fine with the esp32 board. But for better accuracy, I changed the method. Now the method is within 20 seconds how many counts of the magnet were detected will be output as an average wind speed. Since then the wind speed reading couldn’t be seen on the serial monitor. ( I have the wind speed part of the code built for the Arduino Uno & it works fine with both methods). The Arduino sketch is below. The only change I did in 2 methods are
if (revolutions>=20) { was changed to if ((millis ()-timeold)==30000) {
//Define all libraries in here....
#include<FirebaseESP32.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include "DHT.h"
#define FIREBASE_HOST "https://digital-weather-station-default-rtdb.firebaseio.com/"
#define FIREBASE_AUTH "jbqMg4BPxhCTTicMJAXXvV3LiuFW85PZVb8e8GZY"
const char *ssid = "SVITIN-70A0";
const char *password = "10237684";
String D;
#define DHTPIN 4
#define DHTTYPE DHT22 // DHT 22 (AM2302)
#define Offset 0;
// Connect pin 1 (on the left) of the sensor to GROUND
// Connect pin 2 of the sensor to +3.3V
// Connect pin 3 (on the right) of the sensor to whatever your DHTPIN is
DHT dht(DHTPIN, DHTTYPE);
FirebaseData firebaseData;
//Variables For Humidity & Temperature
float h=0; //Define Humidity value Default Value = 0
float t=0; //Define Temp value in celcius Default Value = 0
//Variables For Wind Speed
volatile byte revolutions;
float rpmilli;
float Speed;
unsigned long timeold=0;
//Variables For Wind Direction
int VaneValue;// raw analog value from wind vane
int Direction;// translated 0 - 360 direction
int CalDirection;// converted value with offset applied
int LastValue;
//Defined new void funtion for get temp and hum...
void Temp(){
// Wait a two seconds between measurements.
delay(2000); // Reading temperature or humidity takes about 250 milliseconds!
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
Serial.print(F("Humidity: "));
Serial.print(h);
Serial.print(F("% Temperature: "));
Serial.print(t);
Serial.print(F("°C "));
if (Firebase.pushFloat(firebaseData, "/Weather Results/Temperature",t))
{
Serial.println("PASSED");
Serial.println("PATH: " + firebaseData.dataPath());
Serial.println("TYPE: " + firebaseData.dataType());
Serial.println("ETag: " + firebaseData.ETag());
Serial.println("------------------------------------");
Serial.println();
}
else
{
Serial.println("FAILED");
Serial.println("REASON: " + firebaseData.errorReason());
Serial.println("------------------------------------");
Serial.println();
}
if (Firebase.pushFloat(firebaseData, "/Weather Results/Humidity",h))
{
Serial.println("PASSED");
Serial.println("PATH: " + firebaseData.dataPath());
Serial.println("TYPE: " + firebaseData.dataType());
Serial.println("ETag: " + firebaseData.ETag());
Serial.println("------------------------------------");
Serial.println();
}
else
{
Serial.println("FAILED");
Serial.println("REASON: " + firebaseData.errorReason());
Serial.println("------------------------------------");
Serial.println();
}
}
void WSpeed(){
// if (revolutions>=20) {
if ((millis ()-timeold)==30000) {
//Update RPM every 30 seconds, increase this for better RPM resolution,
//decrease for faster update
// calculate the revolutions per milli(second)
rpmilli = ((float)revolutions)/(millis()-timeold);
timeold = millis();
revolutions = 0;
// WHEELCIRC = 2 * PI * radius (in meters)
// speed = rpmilli * WHEELCIRC * "milliseconds per hour" / "meters per kilometer"
// simplify the equation to reduce the number of floating point operations
// speed = rpmilli * WHEELCIRC * 3600000 / 1000
// speed = rpmilli * WHEELCIRC * 3600
Speed = rpmilli * 0.7665 * 3600;
Serial.print("RPM:");
Serial.print(rpmilli * 60000);
Serial.print(" Speed:");
Serial.print(Speed);
Serial.println(" kmph");
if (Firebase.pushFloat(firebaseData, "/Weather Results/Speed",Speed))
{
Serial.println("PASSED");
Serial.println("PATH: " + firebaseData.dataPath());
Serial.println("TYPE: " + firebaseData.dataType());
Serial.println("ETag: " + firebaseData.ETag());
Serial.println("------------------------------------");
Serial.println();
}
else
{
Serial.println("FAILED");
Serial.println("REASON: " + firebaseData.errorReason());
Serial.println("------------------------------------");
Serial.println();
}
}
}
void rpm_fun()
{
revolutions++;
}
void WDirection(){
VaneValue = analogRead(34);
Direction = map(VaneValue, 0, 4095, 0, 360);
CalDirection = Direction + Offset;
// Only update serial monitor if change greater than 5 degrees.
if(abs(CalDirection - LastValue) > 1){
Serial.print(VaneValue); Serial.print("\t\t");
Serial.print(CalDirection); Serial.print("\t\t");
getHeading(CalDirection);
LastValue = CalDirection;
}
}
// Converts compass direction to heading
void getHeading(int Direction) {
if(Direction < 35){
Serial.println("N");
D="N";
}
else if (Direction < 100){
Serial.println("NE");
D = "NE" ;
}
else if (Direction < 170){
Serial.println("E");
D = "E" ;
}
else if (Direction < 200 ){
Serial.println("SE");
D = "SE" ;
}
else if (Direction < 210){
Serial.println("S");
D = "S" ;
}
else if (Direction < 245){
Serial.println("SW");
D = "SW" ;
}
else if (Direction < 259){
Serial.println("W");
D = "W" ;
}
else if (Direction < 268){
Serial.println("NW");
D = "NW" ;
}
else
Serial.println();
if (Firebase.pushString(firebaseData, "/Weather Results/Wind Direction",D))
{
Serial.println("PASSED");
Serial.println("PATH: " + firebaseData.dataPath());
Serial.println("TYPE: " + firebaseData.dataType());
Serial.println("ETag: " + firebaseData.ETag());
Serial.println("------------------------------------");
Serial.println();
}
else
{
Serial.println("FAILED");
Serial.println("REASON: " + firebaseData.errorReason());
Serial.println("------------------------------------");
Serial.println();
}
}
void setup() {
Serial.begin(115200);
Serial.println(F("DHTxx test!"));
dht.begin(); //DHT and TEMP sensor starting.....
attachInterrupt(digitalPinToInterrupt(27), rpm_fun, RISING); // Attaching Interrupt funtion for wind speed....
revolutions = 0;
rpmilli = 0;
timeold = 0;
LastValue = 1;
Serial.println("Vane Value\tDirection\tHeading");
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();
Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
Firebase.reconnectWiFi(true);
}
void loop() {
Temp();
delay(2000);
WSpeed();
delay(2000);
WDirection();
delay(2000);
}
Thank you so much in advance for your help!