Pressure Relay rev_01

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    - Project: Pressure Relay
    - Source Code NOT compiled for: ESP8266 NodeMCU V1.0
    - Source Code created on: 2025-12-17 01:04:44

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Allumer relais lorsque presion entre 1 et 3 bar */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

// System Requirements: "Allumer relais lorsque presion entre 1 et 3 bar".
// Use ADS1115 to measure pressure and control relay accordingly.
// Libraries
#include <Wire.h>
#include <DFRobot_ADS1115.h>

// Constants
const uint8_t PRESSURE_SENSOR_I2C_ADDRESS = 72; // 0x48
const uint8_t RELAY_PIN = D0; // GPIO 16

// Instance of ADS1115
DFRobot_ADS1115 ads(&Wire);

// Variable to hold pressure value
int pressure_mV;

void setup() {
  Serial.begin(115200); // Initialize serial communication
  // Initialize I2C
  Wire.begin();
  // Setup ADS1115
  ads.setAddr_ADS1115(PRESSURE_SENSOR_I2C_ADDRESS); // Set I2C address 0x48
  ads.setGain(eGAIN_TWO); // Configure for pressure range suitable
  ads.setMode(eMODE_SINGLE); // Single shot mode
  ads.setRate(eRATE_128); // 128SPS
  ads.setOSMode(eOSMODE_SINGLE); // Single conversion
  // Setup relay pin
  pinMode(RELAY_PIN, OUTPUT); // Relay control pin
  digitalWrite(RELAY_PIN, LOW); // Ensure relay off initially
  // Initialize ADS1115
  ads.init();
  delay(100); // Wait for setup
}

void loop() {
  if (ads.checkADS1115()) { // Check connection
    // Read pressure in mV from channel 0
    pressure_mV = ads.readVoltage(0);
    Serial.print("Pressure: ");
    Serial.print(pressure_mV);
    Serial.println(" mV");
    // Convert voltage to pressure in bar (assuming voltage corresponds to pressure range)
    // For example, if 0-6.144V covers 0-10 bar, then 1V = 1.63 bar
    float pressure_bar = (pressure_mV / 1000.0) * (10.0 / 6.144); // Adjust as per sensor calibration
    Serial.print("Pressure in bar: ");
    Serial.println(pressure_bar);
    // Control relay based on pressure
    if (pressure_bar >= 1.0 && pressure_bar <= 3.0) {
      digitalWrite(RELAY_PIN, HIGH); // Turn relay on
    } else {
      digitalWrite(RELAY_PIN, LOW); // Turn relay off
    }
  } else {
    Serial.println("ADS1115 Disconnected!");
    // Turn relay off if sensor disconnected
    digitalWrite(RELAY_PIN, LOW);
  }
  delay(1000); // Wait 1 second before next reading
}

/* END CODE */