void connectAWS() {
  // Configure WiFiClientSecure to use the AWS IoT device credentials
  net.setCACert(AWS_CERT_CA);
  net.setCertificate(AWS_CERT_CRT);
  net.setPrivateKey(AWS_CERT_PRIVATE);

  // Connect to the MQTT broker on the AWS endpoint
  client.begin(AWS_IOT_ENDPOINT, 8883, net);

  Serial.println("Connecting to AWS IOT");

  while (!client.connect(AWS_THING_NAME)) {
    Serial.print(".");
    delay(100);
  }

  Serial.println("AWS IoT Connected!");
}