Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Conclusion

Team IoT:

Swathi

•

GKKR

•

M. Ramanadha

Published November 1, 2017 © GPL3+

Claim Warranty for Water Purifier

We have a water purifier as a home appliance; if the system is damaged within the warranty period, we can appeal refund/replacement.

BeginnerFull instructions provided1 hour877

$100

ST SensorTile: IoT Sensing Magic!

Things used in this project

Hardware components

STM32 SensorTile

Software apps and online services

STM32 ST BlueM

Story

In our home we have various types of electrical home appliances like a refrigerator, air conditioner, cooler, water purifier, water pumping motor, grinder, mixer, etc. These devices have internal motors to pump or suck air and water; when they are not able to do this function, the motors cause noise and it will be irritating and can cause sound pollution. Because it is dangerous to use these devices perpetually, there is a need to undergo maintenance. In order to claim the warranty, we can send a report to the firm to replace or undergo maintenance. The detail report on the device health can be preferable for warranty claim purposes for this we need a SensorTile-like device. Through this device we can measure the system acceleration, noise, vibrations and can complete the report. It will be a bit difficult to understand the issue with our device for the technician when we interact with them in a telephone call. So they need to come first, check and again come with required material to undergo maintenance. In this process, there will be breaks to understand the system health and why water is an important source to us.

Explained in the following steps is how to send a detailed data report to the authorized service center using a SensorTile device about the water purifier health status to undergo maintenance or replace it.

Step 1:

When the purifier was in good working condition it was not making any noise or vibrations. Sometime later there was a problem with the water purifier in my home, it was making a vibrating noise and purified water was not able to fill the tank.

Water purifier not working properly

Step 2:

SensorTile is placed on the water purifier to record the vibrations and noise levels.

SensorTile is place on the water purifier to measure the vibratinal noise.

Step 3:

Open the ST BlueMS Android Mobile app to record the data and start searching to identify the device.

ST BlueMS app opened in Android mobile phone.

Step 4:

Be sure to switch ON the SensorTile and Bluetooth on your mobile phone, then the app identifies your device as listed. Click on the device to interface connection.

App identified your device.

Step 5:

Once the connection is established, the app screen appears like in the below figure. Click on START LOGGING to log data of the parameters like temperature, humidity, pressure, accelerations, direction, position, noise from the on-board sensors. Swipe the screen to see the recording data on the mobile screen.

Screen short of the app measuring the parameters.

Step 6:

This how the sensorTile looks when it is designed from PCB designing software.

This is the gerber image of the SensorTile.

Step 7:

The measurement can be viewed on the screen plotting accelerations which shows the system is making vibrations when it is running. It may indicate a small oscillation in the graph but for this small system these levels are more.

Acceleration on the app screen shows the vibrational level.

Step 8:

We can go the noise level by selecting MIC option in the app. As soon as we switch ON the water purifier the noise level is increasing instantly which indicates that the system is not in good condition and the intensity level is dangerous to the human ear. The below figure shows the increase of sound when it was switch ON.

Noise level was increased instantly as soon as the purifier was switched ON

Step 9:

As soon as the system is switched OFF the noise level is going drop which indicates that the system was not for use and it is also not pumping water to the tank.

Noise level decay due to the system turn OFF

Step 10:

An analysis is carried out and the graphs are plotted from the recorded data. The analysis graph shows the confirmation on the system health from on-board Accelerometer and Gyro. Both the sensors indicate the high vibration levels. The linear line in between indicates it was turned OFF.

Analysis report from Accelerometer and Gyro on vibrational levels.

Step 11:

The recorded data can be sent through email to the authorized service center after performing the health check.

Recorded data mailed to the service center.

The video shows how we had carried out the instrument health check using the SensorTile device.

Video for checking the water purifier health condition.

Conclusion:

SensorTile device is suitable to monitor and check the electrical system in our home due to its on-board features. Using this we can check any system's health conditions and can send data to the authorized service center to undergo maintenance or replacement during the warranty period. It helps the technician to understand the fault of the device, so they can come with proper materials to sort out the repairs in advance. Water is an important resource for humans, so the problem should be rectified as soon as possible. This is how this SensorTile plays an important role in our home to check the systems health status.

Schematics

Code

SensorTile code

/*Program for SensorTile*/

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "cmsis_os.h"
#include "datalog_application.h"
    
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
    
#define DATAQUEUE_SIZE     ((uint32_t)100)
                                                              
typedef enum
{
  THREAD_1 = 0,
  THREAD_2
} Thread_TypeDef;
  
/* Private variables ---------------------------------------------------------*/

osThreadId GetDataThreadId, WriteDataThreadId;

osMessageQId dataQueue_id;
osMessageQDef(dataqueue, DATAQUEUE_SIZE, int);

osPoolId sensorPool_id;
osPoolDef(sensorPool, DATAQUEUE_SIZE, T_SensorsData);

osSemaphoreId readDataSem_id;
osSemaphoreDef(readDataSem);

osSemaphoreId doubleTapSem_id;
osSemaphoreDef(doubleTapSem);

/* LoggingInterface = USB_Datalog  --> Save sensors data on SDCard (enable with double click) */
/* LoggingInterface = SDCARD_Datalog  --> Send sensors data via USB */
LogInterface_TypeDef LoggingInterface = USB_Datalog;

USBD_HandleTypeDef  USBD_Device;
static volatile uint8_t MEMSInterrupt = 0;
volatile uint8_t no_H_HTS221 = 0;
volatile uint8_t no_T_HTS221 = 0;

void *LSM6DSM_X_0_handle = NULL;
void *LSM6DSM_G_0_handle = NULL;
void *LSM303AGR_X_0_handle = NULL;
void *LSM303AGR_M_0_handle = NULL;
void *LPS22HB_P_0_handle = NULL;
void *LPS22HB_T_0_handle = NULL; 
void *HTS221_H_0_handle = NULL; 
void *HTS221_T_0_handle = NULL;

/* Private function prototypes -----------------------------------------------*/
static void GetData_Thread(void const *argument);
static void WriteData_Thread(void const *argument);

static void Error_Handler( void );
static void initializeAllSensors( void );
void enableAllSensors( void );
void disableAllSensors( void );
void setOdrAllSensors( void );

void dataTimer_Callback(void const *arg);
void dataTimerStart(void);
void dataTimerStop(void);

osTimerId sensorTimId;
osTimerDef(SensorTimer, dataTimer_Callback);

uint32_t  exec;
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  HAL_Init();

  /* Configure the System clock to 80 MHz */
  SystemClock_Config();

  if(LoggingInterface == USB_Datalog)
  {
    /* Initialize LED */
    BSP_LED_Init(LED1);
    BSP_LED_Off(LED1);
  }
 
  /* enable USB power on Pwrctrl CR2 register */
  HAL_PWREx_EnableVddUSB();
  
  if(LoggingInterface == USB_Datalog) /* Configure the USB */
  {
    /*** USB CDC Configuration ***/
    /* Init Device Library */
    USBD_Init(&USBD_Device, &VCP_Desc, 0);
    /* Add Supported Class */
    USBD_RegisterClass(&USBD_Device, USBD_CDC_CLASS);
    /* Add Interface callbacks for AUDIO and CDC Class */
    USBD_CDC_RegisterInterface(&USBD_Device, &USBD_CDC_fops);
    /* Start Device Process */
    USBD_Start(&USBD_Device);
  }
  else /* Configure the SDCard */
  {
    DATALOG_SD_Init();
  }

  /* Thread 1 definition */
  osThreadDef(THREAD_1, GetData_Thread, osPriorityAboveNormal, 0, configMINIMAL_STACK_SIZE*4);
  
  /* Thread 2 definition */
  osThreadDef(THREAD_2, WriteData_Thread, osPriorityNormal, 0, configMINIMAL_STACK_SIZE*4);
  
  /* Start thread 1 */
  GetDataThreadId = osThreadCreate(osThread(THREAD_1), NULL);

  /* Start thread 2 */
  WriteDataThreadId = osThreadCreate(osThread(THREAD_2), NULL);  
  
  /* Start scheduler */
  osKernelStart();

  /* We should never get here as control is now taken by the scheduler */
  for (;;);

}

/**
  * @brief  Get data raw from sensors to queue
  * @param  thread not used
  * @retval None
  */
static void GetData_Thread(void const *argument)
{
  (void) argument;
  uint8_t doubleTap = 0;
  T_SensorsData *mptr;
  
  sensorPool_id = osPoolCreate(osPool(sensorPool));     
  dataQueue_id = osMessageCreate(osMessageQ(dataqueue), NULL);
  
  readDataSem_id = osSemaphoreCreate(osSemaphore(readDataSem), 1);
  osSemaphoreWait(readDataSem_id, osWaitForever);
  
  doubleTapSem_id = osSemaphoreCreate(osSemaphore(doubleTapSem), 1);
  osSemaphoreWait(doubleTapSem_id, osWaitForever);
  
  /* Configure and disable all the Chip Select pins */
  Sensor_IO_SPI_CS_Init_All();
  
  /* Initialize and Enable the available sensors */
  initializeAllSensors();
  enableAllSensors();
  
  if(LoggingInterface == USB_Datalog)
  {
    dataTimerStart();
  }
  
  for (;;)
  {
    osSemaphoreWait(readDataSem_id, osWaitForever);
    if(MEMSInterrupt && LoggingInterface == SDCARD_Datalog)
    {
      MEMSInterrupt = 0;
      BSP_ACCELERO_Get_Double_Tap_Detection_Status_Ext(LSM6DSM_X_0_handle, &doubleTap);
      if(doubleTap)
      {
        if(SD_Log_Enabled) 
        {
          dataTimerStop();
          osMessagePut(dataQueue_id, 0x00000007, osWaitForever);
        }
        else
        {
          osMessagePut(dataQueue_id, 0x00000007, osWaitForever);
        }
      }
    }
    else
    {
      /* Try to allocate a memory block and check if is not NULL */
      mptr = osPoolAlloc(sensorPool_id);
      if(mptr != NULL)
      {
        /* Get Data from Sensors */
        if(getSensorsData(mptr) == COMPONENT_OK)
        {
          /* Push the new memory Block in the Data Queue */
          if(osMessagePut(dataQueue_id, (uint32_t)mptr, osWaitForever) != osOK)
          {
             Error_Handler();
          }
        }
        else
        {
          Error_Handler();
        }
      }
      else
      {
        Error_Handler();
      }
    }
  }
}


/**
  * @brief  Write data in the queue on file or streaming via USB
  * @param  argument not used
  * @retval None
  */
static void WriteData_Thread(void const *argument)
{
  (void) argument;
  osEvent evt;
  T_SensorsData *rptr;
  int size;
  char data_s[256];
  
  for (;;)
  {
    evt = osMessageGet(dataQueue_id, osWaitForever);  // wait for message
    if (evt.status == osEventMessage)
    {
      if(evt.value.v == 0x00000007)
      {
        if (SD_Log_Enabled) 
        {
          DATALOG_SD_Log_Disable();
          SD_Log_Enabled=0;
        }
        else
        {
          while(SD_Log_Enabled != 1)
          {
            if(DATALOG_SD_Log_Enable())
            {
              SD_Log_Enabled=1;
              osDelay(100);
              dataTimerStart();
            }
            else
            {
              //DATALOG_SD_Log_Disable();
              DATALOG_SD_DeInit();
              DATALOG_SD_Init();
              osDelay(100);
            }
          }
        }
      }
      else
      {
        rptr = evt.value.p;

        if(LoggingInterface == USB_Datalog)
        {
          size = sprintf(data_s, "TimeStamp: %d\r\n Acc_X: %d, Acc_Y: %d, Acc_Z :%d\r\n Gyro_X:%d, Gyro_Y:%d, Gyro_Z:%d\r\n Magn_X:%d, Magn_Y:%d, Magn_Z:%d\r\n Press:%5.2f, Temp:%5.2f, Hum:%4.1f\r\n",
                       rptr->ms_counter,
                       (int)rptr->acc.AXIS_X, (int)rptr->acc.AXIS_Y, (int)rptr->acc.AXIS_Z,
                       (int)rptr->gyro.AXIS_X, (int)rptr->gyro.AXIS_Y, (int)rptr->gyro.AXIS_Z,
                       (int)rptr->mag.AXIS_X, (int)rptr->mag.AXIS_Y, (int)rptr->mag.AXIS_Z,
                       rptr->pressure, rptr->temperature, rptr->humidity);
          osPoolFree(sensorPool_id, rptr);      // free memory allocated for message
          BSP_LED_Toggle(LED1);
          CDC_Fill_Buffer(( uint8_t * )data_s, size);
        }
        else
        {
          size = sprintf(data_s, "%d, %d, %d, %d, %d, %d, %d, %d, %d, %d, %5.2f, %5.2f, %4.1f\r\n",
                       rptr->ms_counter,
                       (int)rptr->acc.AXIS_X, (int)rptr->acc.AXIS_Y, (int)rptr->acc.AXIS_Z,
                       (int)rptr->gyro.AXIS_X, (int)rptr->gyro.AXIS_Y, (int)rptr->gyro.AXIS_Z,
                       (int)rptr->mag.AXIS_X, (int)rptr->mag.AXIS_Y, (int)rptr->mag.AXIS_Z,
                       rptr->pressure, rptr->temperature, rptr->humidity);
          osPoolFree(sensorPool_id, rptr);      // free memory allocated for message
          DATALOG_SD_writeBuf(data_s, size);
        }
      }
    }
  }
}


void dataTimer_Callback(void const *arg)
{ 
  osSemaphoreRelease(readDataSem_id);
} 


void dataTimerStart(void)
{
  osStatus  status;
 
  // Create periodic timer
  exec = 1;
  sensorTimId = osTimerCreate(osTimer(SensorTimer), osTimerPeriodic, &exec);
  if (sensorTimId)  {
    status = osTimerStart (sensorTimId, DATA_PERIOD_MS);                // start timer
    if (status != osOK)  {
      // Timer could not be started
    } 
  }
}

void dataTimerStop(void)
{
  osTimerStop(sensorTimId);
}




/**
* @brief  Initialize all sensors
* @param  None
* @retval None
*/
static void initializeAllSensors( void )
{
  if (BSP_ACCELERO_Init( LSM6DSM_X_0, &LSM6DSM_X_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if (BSP_GYRO_Init( LSM6DSM_G_0, &LSM6DSM_G_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if (BSP_ACCELERO_Init( LSM303AGR_X_0, &LSM303AGR_X_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if (BSP_MAGNETO_Init( LSM303AGR_M_0, &LSM303AGR_M_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if (BSP_PRESSURE_Init( LPS22HB_P_0, &LPS22HB_P_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if (BSP_TEMPERATURE_Init( LPS22HB_T_0, &LPS22HB_T_0_handle ) != COMPONENT_OK)
  {
    while(1);
  }
  
  if(BSP_TEMPERATURE_Init( HTS221_T_0, &HTS221_T_0_handle ) == COMPONENT_ERROR)
  {
    no_T_HTS221 = 1;
  }
  
  if(BSP_HUMIDITY_Init( HTS221_H_0, &HTS221_H_0_handle ) == COMPONENT_ERROR)
  {
    no_H_HTS221 = 1;
  }
  
  if(LoggingInterface == SDCARD_Datalog)
  {
    /* Enable HW Double Tap detection */
    BSP_ACCELERO_Enable_Double_Tap_Detection_Ext(LSM6DSM_X_0_handle, INT2_PIN);
    BSP_ACCELERO_Set_Tap_Threshold_Ext(LSM6DSM_X_0_handle, LSM6DSM_TAP_THRESHOLD_MID);
  }
  
}

/**
* @brief  Enable all sensors
* @param  None
* @retval None
*/
void enableAllSensors( void )
{
  BSP_ACCELERO_Sensor_Enable( LSM6DSM_X_0_handle );
  BSP_GYRO_Sensor_Enable( LSM6DSM_G_0_handle );
  BSP_ACCELERO_Sensor_Enable( LSM303AGR_X_0_handle );
  BSP_MAGNETO_Sensor_Enable( LSM303AGR_M_0_handle );
  BSP_PRESSURE_Sensor_Enable( LPS22HB_P_0_handle );
  BSP_TEMPERATURE_Sensor_Enable( LPS22HB_T_0_handle );
  if(!no_T_HTS221)
  {
    BSP_TEMPERATURE_Sensor_Enable( HTS221_T_0_handle );
  }
  if(!no_H_HTS221)
  {
    BSP_HUMIDITY_Sensor_Enable( HTS221_H_0_handle );
  }
}
/**
* @brief  Set ODR all sensors
* @param  None
* @retval None
*/
void setOdrAllSensors( void )
{
  BSP_ACCELERO_Set_ODR_Value( LSM303AGR_X_0_handle, ACCELERO_ODR);
  BSP_MAGNETO_Set_ODR_Value( LSM303AGR_M_0_handle, MAGNETO_ODR);
  BSP_GYRO_Set_ODR_Value(LSM6DSM_G_0_handle, GYRO_ODR);
  BSP_PRESSURE_Set_ODR_Value( LPS22HB_P_0_handle, PRESSURE_ODR);
  BSP_TEMPERATURE_Set_ODR_Value( HTS221_T_0_handle, TEMPERATURE_ODR);
  BSP_HUMIDITY_Set_ODR_Value( HTS221_H_0_handle, TEMPERATURE_ODR );    
}


/**
* @brief  Disable all sensors
* @param  None
* @retval None
*/
void disableAllSensors( void )
{
  BSP_ACCELERO_Sensor_Disable( LSM6DSM_X_0_handle );
  BSP_ACCELERO_Sensor_Disable( LSM303AGR_X_0_handle );
  BSP_GYRO_Sensor_Disable( LSM6DSM_G_0_handle );
  BSP_MAGNETO_Sensor_Disable( LSM303AGR_M_0_handle );
  BSP_HUMIDITY_Sensor_Disable( HTS221_H_0_handle );
  BSP_TEMPERATURE_Sensor_Disable( HTS221_T_0_handle );
  BSP_TEMPERATURE_Sensor_Disable( LPS22HB_T_0_handle );
  BSP_PRESSURE_Sensor_Disable( LPS22HB_P_0_handle );
}

/**
* @brief  EXTI line detection callbacks
* @param  GPIO_Pin: Specifies the pins connected EXTI line
* @retval None
*/
void HAL_GPIO_EXTI_Callback( uint16_t GPIO_Pin )
{
  MEMSInterrupt=1;
  osSemaphoreRelease(readDataSem_id);
}

/**
* @brief  This function is executed in case of error occurrence
* @param  None
* @retval None
*/
static void Error_Handler( void )
{
  while (1)
  {}
}


#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {}
}
#endif

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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$100

ST SensorTile: IoT Sensing Magic!

Claim Warranty for Water Purifier