Hello, I am French and I hope my English will be understandable.
I want to check the temperature (ds18b20) with my nodemcu and check it with Blynk.
When the temperature exceeds 82 degrees the relay closes and when the temperature drops to 72 it turns back on.The code works correctly but as soon as I add the blynk code I can’t do it anymore. The error message appears: ‘A1’ was not declared in this scope.
Thanks for your help
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include "OneWire.h"
#include "DallasTemperature.h"
// 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[] = "****";
#define WATER_TEMP_PIN A1
#define RELAY_PIN A0
OneWire oneWire(WATER_TEMP_PIN);
DallasTemperature sensors(&oneWire);
BlynkTimer timer;
bool allume = true ; // true pour cuiseurvapeur allumé, false sinon
void sendSensor()
{
float t = Serial.print(dTempWater); // or dht.readTemperature(true) for Fahrenheit
if (isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V6, t);
}
void setup()
{
pinMode (RELAY_PIN, OUTPUT);
// On initialise la connexion série
Serial.begin(9600);
delay(2000);
Blynk.begin(auth, ssid, pass);
timer.setInterval(1000L, sendSensor);
}
void loop()
{
// On récupère la température de la sonde
sensors.requestTemperatures();
double dTempWater = sensors.getTempCByIndex(0);
// On imprime la température
Serial.print("Température de l'eau: ");
Serial.print(dTempWater);
Serial.println("°C");
// On attends 5 secondes
delay(5000);
if (isnan(dTempWater)) {
Serial.println("Failed to read from DHT sensor!");
} else {
if (dTempWater >= 82) allume = false;}
{ if (dTempWater <= 72) allume = true;
}
digitalWrite(RELAY_PIN, allume);
Blynk.run();
timer.run();
}>```