Bonjour très chers bidouilleurs et autres experts de ce fabuleux outil,
Mon expertise limité m'impose aujourd'hui de poster une question et d'appeler à l'aide 
Je souhaite réaliser un projet de pilotage d'une pompe selon un delta de capteur de température (S1 Vs S2) pour une installation de chauffage.
Je planche et stagne depuis de nombreuses heures sur le fait que mon relais reste après de bref switch d'initialisations (que je ne comprends d'ailleurs pas) définitivement allumé le code conditionnel (if / else if) fonctionne seulement sur le principe et le textuel mais pas le relais.
Si quelqu'un arrive à m'expliquer le problème ou a une solution je suis tout oui
merci d'avance
voici le code complet :
// include libraries
#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is plugged into pin 13 on the Arduino
#define ONE_WIRE_BUS 13 // Arduino pin connected to DS18B20 sensor's DQ pin
#define precision 12 //onewire precision dallas sensor
//const int digPin = 12;
int sen_number = 0; //counter of Dallas sensors
int S1TempC, S2TempC, S3TempC, S4TempC;
int Ch_Pump = 6; //Relay pump pin
// flow measurement definition
int flowPin = 2; //This is the input pin on the Arduino
double flowRate; //This is the value we intend to calculate.
volatile int count; //This integer needs to be set as volatile to ensure it updates correctly during the interrupt process.
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with devices
DallasTemperature sensors(&oneWire); // pass oneWire to DallasTemperature library
DeviceAddress T1, T2, T3, T4;// arrays to hold device adresses
//float tempCelsius; // temperature in Celsius
//float tempFahrenheit; // temperature in Fahrenheit
void setup()
{
Serial.begin(9600); // initialize serial
// put your setup code here, to run once:
pinMode(flowPin, INPUT); //Sets the pin as an input
attachInterrupt(0, Flow, RISING); //Configures interrupt 0 (pin 2 on the Arduino Uno) to run the function "Flow"
pinMode(Ch_Pump, OUTPUT);
digitalWrite(Ch_Pump, LOW);
sensors.begin(); // initialize the sensor
Serial.print("*Temp Sensor:* ");
Serial.print("Found: ");
Serial.print(sensors.getDeviceCount(), DEC);
Serial.println(" Devices.");
// report parasite power requirements
Serial.print("Parasite power is: ");
if (sensors.isParasitePowerMode()) Serial.println("ON");
else Serial.println("OFF");
// Search for devices on the bus and assign based on an index.
if (!sensors.getAddress(T1, 0)) Serial.println("Not Found Sensor 1");
if (!sensors.getAddress(T2, 1)) Serial.println("Not Found Sensor 2");
if (!sensors.getAddress(T3, 2)) Serial.println("Not Found Sensor 3");
if (!sensors.getAddress(T4, 3)) Serial.println("Not Found Sensor 4");
//show the addresses we found on the bus
for (int k =0; k < sensors.getDeviceCount(); k++) {
Serial.print("Sensor "); Serial.print(k+1);
Serial.print(" Address: ");
if (k == 0) { printAddress(T1); Serial.println();}
else if (k == 1) { printAddress(T2); Serial.println();}
else if (k == 2) { printAddress(T3); Serial.println();}
else if (k == 3) { printAddress(T4); Serial.println();}
}
// set the resolution to 12 bit per device
sensors.setResolution(T1, precision);
sensors.setResolution(T2, precision);
sensors.setResolution(T3, precision);
sensors.setResolution(T4, precision);
for (int k =0; k < sensors.getDeviceCount(); k++) {
Serial.print("Sensor "); Serial.print(k+1);
Serial.print(" Resolution(best=12 bit): ");
if (k == 0) { Serial.print(sensors.getResolution(T1), DEC); Serial.println();
} else if (k == 1) { Serial.print(sensors.getResolution(T2), DEC); Serial.println();
} else if (k == 2) { Serial.print(sensors.getResolution(T3), DEC); Serial.println();
} else if (k == 3) { Serial.print(sensors.getResolution(T4), DEC); Serial.println();
}
}
Serial.println("Flow sensor in use YF-S201 (1-30l/min)");
}
// function to print a device address
void printAddress(DeviceAddress deviceAddress)
{
for (uint8_t i = 0; i < 8; i++)
{
//zero pad the address if necessary
if (deviceAddress[i] < 16) Serial.print("0");
Serial.print(deviceAddress[i], HEX);
}
}
// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress)
{
float tempC = sensors.getTempC(deviceAddress);
Serial.print(",Temp.[°C]|[°F]:, ");
Serial.print(tempC);
//Serial.print(" °C ");
Serial.print(" , "); // separator between Celsius and Fahrenheit
Serial.print(DallasTemperature::toFahrenheit(tempC));
Serial.print(" , ");
//Serial.print(" °F ");
}
// function to print a device's resolution
//void printResolution(DeviceAddress deviceAddress)
//{}
void printData(DeviceAddress deviceAddress)
{
Serial.print(" Address: ");
printAddress(deviceAddress);
Serial.print(" ");
printTemperature(deviceAddress);
//Serial.println();
}
void loop()
{
float S1TempC = sensors.getTempC(T1);
float S2TempC = sensors.getTempC(T2);
float S3TempC = sensors.getTempC(T3);
float S4TempC = sensors.getTempC(T4);
digitalWrite(Ch_Pump, LOW);
count = 0; // Reset the counter so we start counting from 0 again
interrupts(); //Enables interrupts on the Arduino
// call sensors.requestTemperatures() to issue a global temperature request to all devices on the bus
//Serial.print("Reading DATA...");
sensors.requestTemperatures();
//Serial.println("DONE");
// print the device information
for (int k =0; k < sensors.getDeviceCount(); k++) {
Serial.print("Sensor "); Serial.print(k+1); Serial.print(",");
if (k == 0) { printData(T1);}
else if (k == 1) { printData(T2);}
else if (k == 2) { printData(T3);}
else if (k == 3) { printData(T4);}
}
if (sen_number == sensors.getDeviceCount()) {
sen_number = 0; // reset counter
}
// ***Pump Managment***
//Serial.print("S1TempC: ");Serial.print(S1TempC);Serial.print(" ");
//Serial.print("S2TempC: ");Serial.print(S2TempC);Serial.print(" ");
//Serial.print("S3TempC: ");Serial.print(S3TempC);Serial.print(" "); // verif. fonc. variables SxTempC
//Serial.print("S4TempC: ");Serial.print(S4TempC);Serial.print(" ");
if ((S1TempC > S2TempC)) // if temp S1 (Bath sensor) superior than S2 (Prim.heat echangeur entry) then Turn pump ON
{
**digitalWrite(Ch_Pump, LOW);**
Serial.print("chaleur : S1-secondire> Entrée.ECH PUMP ON --> ");
}
else if(S1TempC > S2TempC)
{
**digitalWrite(Ch_Pump, HIGH);**
Serial.print("chaleur : S1-secondaire> Entrée.ECH PUMP ON --> ");
}
}
//Serial.print("Sensor Number="); Serial.println(sen_number);
delay(30000); // give the time between each temp measure and used for rotation calculation --> 10.000 = 10sec
noInterrupts(); //Disable the interrupts on the Arduino
//Start the math of Flow measurement
flowRate = (count * 2.236); //rotation determination : Take counted pulses(rotation) in the last "delay" period and multiply by 2.236mL (mean of info found over internet 2,22 2,5ml/rotation)
flowRate = flowRate * 2; //time conversion : Convert "delay period" to minutes, giving you mL / Minute
flowRate = flowRate / 1000; //Convert mL to Liters, giving you Liters / Minute
//Flow measurement indication
Serial.print("Flow YF-S201 [l/min]:, ");
Serial.println(flowRate); //Print the variable flowRate to Serial in l/min
//Serial.print(" l/min");
//Serial.println(" - normal pump flow 13,3l/min");
//sen_number++ ;
}
void Flow()
{
count++; //Every time this function is called, increment "count" by 1
}
