hi, i need help, currently im doing my project for my university course, device 1,2 and 3 are identical device, they are connected to the blynk app. i need to retrieve the data send to the blynk app and find the average between the 3. do i need to do the calculation in the coding or is there any features in the blynk app? thank you. sorry the code is messy, still in prototyping.
if using BLYNK_WRITE, can i use it to retrieve data from other devices?
//blynk
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
//ph
#include "DFRobot_ESP_PH.h"
#include "EEPROM.h"
DFRobot_ESP_PH ph;
#define ESPADC 4096.0 //the esp Analog Digital Convertion value
#define ESPVOLTAGE 3300 //the esp voltage supply value
#define PH_PIN 35 //the esp gpio data pin number
float voltage, phValue, temperature = 25;
//temp
#include <OneWire.h>
#include <DallasTemperature.h>
// GPIO where the DS18B20 is connected to
const int oneWireBus = 32;
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(oneWireBus);
// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);
//led
const byte led_gpio = 34; // The pin the LED is connected to
//turb
#include <Wire.h>
int sensorPin = 33;
float volt;
float ntu;
int turbidity;
int Vclear = 5;
//blynk
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "";
char pass[] = "";
SimpleTimer timer;
int Time_S = 1;
void setup()
{
// Debug console
Serial.begin(9600);
EEPROM.begin(32);
ph.begin();
sensors.begin();
delay(5000);
Blynk.begin(auth, ssid, pass);
//timer.setInterval(1000L, getSendData);
}
void loop()
{
get_ph();
turb();
Blynk.run();
delay(1000);
delay(1000*Time_S);
}
void get_ph() {
static unsigned long timepoint = millis();
if (millis() - timepoint > 1000U) //time interval: 1s
{
timepoint = millis();
//voltage = rawPinValue / esp32ADC * esp32Vin
voltage = analogRead(PH_PIN) / ESPADC * ESPVOLTAGE; // read the voltage
Serial.print("voltage:");
Serial.println(voltage, 4);
sensors.requestTemperatures();
float temperature = sensors.getTempCByIndex(0);
Serial.print(temperature);
Serial.println("ºC");
Blynk.virtualWrite(V2, temperature);
phValue = ph.readPH(voltage, temperature); // convert voltage to pH with temperature compensation
Serial.print("pH:");
Serial.println(phValue, 4);
Blynk.virtualWrite(V1, phValue);
}
ph.calibration(voltage, temperature); // calibration process by Serail CMD
if (phValue < 5) {
Blynk.notify("WARNING! PH VALUE LOWER THAN 5!");
Blynk.email("@gmail.com", "LOW PH WARNING", "WARNING! PH VALUE LOWER THAN 5! REQUIRE IMMEDIATE ATTENTION!");
//ON LED
}
if ((phValue > 5) && (phValue < 9)) {
//Blynk.notify("WARNING! PH VALUE LOW THAN 5!");
//TURN OFF LED
}
if (phValue > 9) {
Blynk.notify("WARNING! PH VALUE HIGHER THAN 9!");
Blynk.email("@gmail.com", "HIGH PH WARNING", "WARNING! PH VALUE HIGHER THAN 5! REQUIRE IMMEDIATE ATTENTION!");
//ON LED
}
if (temperature < 39) {
//Blynk.notify("WARNING! PH VALUE LOW THAN 5!");
//OFF LED
}
if (temperature > 40) {
Blynk.notify("WARNING! TEMPERATURE OF WATER HIGHER THAN 40'C");
Blynk.email("@gmail.com", "HIGH WATER TEMPERATURE WARNING", "WARNING! WATER TEMPTERATURE HIGHER THAN 5! REQUIRE IMMEDIATE ATTENTION!");
//ON LED
}
}
void turb() {
volt = 0;
for(int i=0; i<800; i++)
{
volt += ((float)analogRead(sensorPin)/4095)*5;
}
volt = volt/800;
volt = round_to_dp(volt,2);
if(volt < 2.5){
ntu = 3000;
}else{
ntu = ((-1120.4*(sq(volt)))+(5742.3*volt)-4352.9);
}
Serial.print(volt);
Serial.println(" V");
Serial.print(ntu);
Serial.println(" NTU");
turbidity = 100.00 - (volt / Vclear) * 100.00;
Serial.print("Turbidity: ");
Serial.print(turbidity);
Serial.println(" %");
Blynk.virtualWrite(V3, ntu);
Blynk.virtualWrite(V4, turbidity);
if (turbidity > 80) {
Blynk.notify("WARNING! WATER TOO DIRTY");
Blynk.email("@gmail.com", "DIRTY WATER WARNING", "WARNING! WATER TURBIDITY HIGHER THAN 80%! REQUIRE IMMEDIATE ATTENTION!");
//ON LED
}
delay(1000);
}
float round_to_dp( float in_value, int decimal_place )
{
float multiplier = powf( 10.0f, decimal_place );
in_value = roundf( in_value * multiplier ) / multiplier;
return in_value;
}
