#include <Wire.h>
  #include <Adafruit_SHT31.h>

  Adafruit_SHT31 sht31_bottom;  // 0x44 — bottom
  Adafruit_SHT31 sht31_top;     // 0x45 — 

  void setup() {
    Serial.begin(115200);
    delay(1000);

    Wire.setPins(22, 23);
    Wire.begin();

    if (!sht31_bottom.begin(0x44)) {
      Serial.println("SHT31 #1 (0x44) not found!");
      while (1);
    }
    if (!sht31_top.begin(0x45)) {
      Serial.println("SHT31 #2 (0x45) not found!");
      while (1);
    }
    Serial.println("Reptile Monitor - Dual SHT31 Test");
  }

  void loop() {
    float temp1 = sht31_bottom.readTemperature();
    float hum1  = sht31_bottom.readHumidity();
    float temp2 = sht31_top.readTemperature();
    float hum2  = sht31_top.readHumidity();

    Serial.println("--- Bottom (0x44) ---");
    Serial.print("Temp: "); Serial.print(temp1); Serial.println(" C");
    Serial.print("Hum:  "); Serial.print(hum1);  Serial.println(" %");

    Serial.println("--- Top (0x45) ---");
    Serial.print("Temp: "); Serial.print(temp2); Serial.println(" C");
    Serial.print("Hum:  "); Serial.print(hum2);  Serial.println(" %");

    Serial.println();
    delay(2000);
  }