#include <SPI.h>

#define BME280_CS1_PIN 10
#define BME280_CS2_PIN 9

void setup() {
  Serial.begin(115200);

  // Configure CS pins
  pinMode(BME280_CS1_PIN, OUTPUT);
  digitalWrite(BME280_CS1_PIN, HIGH); // CS is active low
  pinMode(BME280_CS2_PIN, OUTPUT);
  digitalWrite(BME280_CS2_PIN, HIGH); // CS is active low

  // Initialize SPI
  SPI.begin();

  // Initialize BME280 sensors
  if (!initializeBME280(BME280_CS1_PIN)) {
    Serial.println("Failed to initialize BME280 (Sensor 1)");
    while (1);
  }
  if (!initializeBME280(BME280_CS2_PIN)) {
    Serial.println("Failed to initialize BME280 (Sensor 2)");
    while (1);
  }

  Serial.println("Both BME280 sensors initialized successfully");
}

void loop() {
  float humidity1, humidity2;

  // Read humidity from Sensor 1
  if (readBME280Humidity(BME280_CS1_PIN, &humidity1)) {
    Serial.print("Sensor 1 Humidity: ");
    Serial.print(humidity1);
    Serial.println(" %");
  } else {
    Serial.println("Failed to read humidity from Sensor 1");
  }

  // Read humidity from Sensor 2
  if (readBME280Humidity(BME280_CS2_PIN, &humidity2)) {
    Serial.print("Sensor 2 Humidity: ");
    Serial.print(humidity2);
    Serial.println(" %");
  } else {
    Serial.println("Failed to read humidity from Sensor 2");
  }

  delay(1000);
}

bool initializeBME280(uint8_t csPin) {
  digitalWrite(csPin, LOW);
  SPI.transfer(0xD0); // Read chip ID
  uint8_t chipID = SPI.transfer(0x00);
  digitalWrite(csPin, HIGH);

  if (chipID != 0x60) {
    return false; // Chip ID should be 0x60 for BME280
  }

  // Additional initialization steps can be added here

  return true;
}

bool readBME280Humidity(uint8_t csPin, float* humidity) {
  uint8_t data[2];

  digitalWrite(csPin, LOW);
  SPI.transfer(0xFD | 0x80); // Read humidity register

  for (int i = 0; i < 2; i++) {
    data[i] = SPI.transfer(0x00);
  }

  digitalWrite(csPin, HIGH);

  // Process the data
  int32_t adc_H = (data[0] << 8) | data[1];

  // Perform compensation (dummy value here, real calibration needed)
  *humidity = adc_H / 1024.0;

  return true;
}