void setup()

in mxdevice/Device/MXDeviceDemo.ino [114:189]
61 lines of code
4 McCabe index (conditional complexity)

void setup()
{
  Screen.init();
  Screen.print(0, "IoT Device Demo");
  Screen.print(2, "Initializing...");
  
  Screen.print(3, " > Serial");
  Serial.begin(115200);

  // Initialize the WiFi module
  Screen.print(3, " > WiFi");
  hasWifi = false;
  initWifi();
  if (!hasWifi)
  {
    return;   
  }

  // Get MAC address and populate device id
  byte mac[6];
  WiFi.macAddress(mac);
  sprintf(device_id, "%02x%02x%02x" , mac[3], mac[4], mac[5]);
  
  // HTTP call to device endpoint
  char endpoint[100];
  sprintf(endpoint, "%s%s" ,DEVICE_CREDENTIAL_ENDPOINT, device_id);
  Serial.println(endpoint);

  HTTPClient client = HTTPClient(HTTP_GET, endpoint);
  client.set_header("Authorization", DEVICE_CREDENTIAL_ENDPOINT_AUTH);
  const Http_Response *response = client.send(NULL, 0);
  
  if (response != NULL)
  {
    const char *message = response->body;

    JSON_Value *root_value = json_parse_string(message);
    JSON_Object *root_object = json_value_get_object(root_value);\
    device_conn_string = json_object_get_string(root_object, "ConnectionString");
    Serial.println("Get HTTP succeeded");
    Serial.println(device_conn_string);
    Serial.println("after");
  }
  else
  {
    Serial.println("Get HTTP failed");
    return;
  }

  // Write device connection in eeprom
  EEPROMInterface eeprom;
  uint8_t *connString = (uint8_t *) device_conn_string;
  int resp = eeprom.write(connString, AZ_IOT_HUB_MAX_LEN, AZ_IOT_HUB_ZONE_IDX);
  if (resp == 0)
  {
      Serial.println("Successfully wrote device connection string to eeprom");
  }
  else
  {
      Serial.println("Error writing device connection string to eeprom");
      return;
  }
  
  Screen.print(3, " > Sensors");
  sensorInit();

  Screen.print(3, " > IoT Hub");
  DevKitMQTTClient_Init(true);
  DevKitMQTTClient_SetOption(OPTION_MINI_SOLUTION_NAME, "MXDeviceDemo");
  DevKitMQTTClient_SetSendConfirmationCallback(sendConfirmationCallback);
  DevKitMQTTClient_SetMessageCallback(messageCallback);
  DevKitMQTTClient_SetDeviceTwinCallback(deviceTwinCallback);
  DevKitMQTTClient_SetDeviceMethodCallback(deviceMethodCallback);

  send_interval_ms = SystemTickCounterRead();
}