Published April 1, 2021 © Apache-2.0

Distance Sensor Alarm

Control with a sound level depending on reading (IR sensor).

BeginnerFull instructions provided2 hours280

Things used in this project

Hardware components

Hexabitz Audio Speaker Module (H07R30)

Hexabitz 1D Lidar IR Sensor (P08R6x)

Story

The story began when I saw our neighbor in the house next to us as he was parking the car in the designated place, and he was finding it difficult to estimate the distance between him and the car behind him. So I had an idea to put an alarm sensor that would warn the driver of the distance between him and the car behind him

Idea

The idea was to use H07R3 module (Audio Speaker)

https://hexabitz.com/product/audio-speaker-and-headphone-jack-h07r3x/

also H08R6 module (IR sensor)

https://hexabitz.com/product/1d-lidar-ir-sensor-h08r6x/

H08R6 module (IR sensor) will read distance between him and the car

then send message to H07R3 module (Audio Speaker) to play song,

The volume level will increase as the distance decrease between two cars.

HOW TO BUILD IT

I connected IR sensor module (H08R6) with Audio Speaker module (H07R3)

then began in writing code

Explain code

First

I defined fixed topology in both modules (H08R6, H07R3), It describes the connection of the modules between them.

Note : P08R6 module is same H08R6 module but different form

H08R6 module (IR sensor)

P08R6 module (IR sensor)

Second

I have defined each module with a specific ID. The function of this ID is to define the module for another module

example :

Suppose if we had three modules (module1, module2, module3), module 1 will send a message to module 2, How module2 will know from the source of this message (module1 or module2) ?

answer : module2 will know the source this message through ID which send it module1 with this message.

ID module1 (H08R6) is 1

ID module2 (H07R3) is 2

in this part module2 (H07R3) will receive a messages on port3, so I reversed it

Third

in main.c file :

The sensor unit is set to unit cm, then I enabled DMA in order to transmit data from sensor to memory

inside for loop :

call function AbsDistanceToColor(sensor) function of this function is return a value depending on a sensor value, and Assignment return value to state_sensor variable
add delay time, it is time between One message and another
inside switch() we will check state_sensor value
message explain :

messageParams[0 -> 3] = frequency;

messageParams[4] = number of samples for sine wave;

messageParams[5] = play sine wave for specified time;

SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);

2 is ID module2 (H07R3)

CODE_H07R3_PLAY_SINE is code message (through it module2 (H07R3) will know what execute) here we say to module2 (H07R3) play sine wave

6 number of messageparams

note : their is not code for (Audio Speaker module H07R3) because execute code external by messages which will arrive from IR sensor module (H08R6).

H08R6 (IR sensor)

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * COPYRIGHT(c) 2015 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
	
/*
		MODIFIED by Hexabitz for BitzOS (BOS) V0.2.4 - Copyright (C) 2017-2021 Hexabitz
    All rights reserved
*/

/* Includes ------------------------------------------------------------------*/
#include "BOS.h"

/* Private variables ---------------------------------------------------------*/

float sensor = 0.0f;
uint8_t state_sensor;
uint8_t old_state_sensor;
uint8_t mode=1;
uint8_t sample = 200;
/* Private function prototypes -----------------------------------------------*/
uint8_t AbsDistanceToColor(float distance);

uint8_t counter=0;

/* Main functions ------------------------------------------------------------*/

int main(void)
{


  /* MCU Configuration----------------------------------------------------------*/

  /* Reset all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all user peripherals */

  /* Initialize BitzOS */
  BOS_Init();

  /* Call init function for freertos objects (in freertos.c) */
  MX_FREERTOS_Init();

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

  /* Infinite loop */
  while (1)
  {

  }

}

/*-----------------------------------------------------------*/

/* User Task */
void UserTask(void * argument)
{

//	 Set units to mm
	SetRangeUnit(UNIT_MEASUREMENT_CM);
//	 Stream to memory
	Stream_ToF_Memory(50, portMAX_DELAY, &sensor);

  for(;;)
  {

	  state_sensor = AbsDistanceToColor(sensor);

	  Delay_ms(250);
	  switch(state_sensor)
	  {

		  case 1:
			        //freq
			  	  	messageParams[0] = (uint8_t)(150>>24);
		 		  	  messageParams[1] = (uint8_t)(150>>16);
		 		  	  messageParams[2] = (uint8_t)(150>>8);
		 		  	  messageParams[3] = (uint8_t)(150);
		 		  	  // MusicNotesNumOfSamples
		 		  	  messageParams[4] = sample;
		 		  	  // durationInSeconds 2 sec
		 		  	  //Note: time Division 16 in sec
		 		  	  //Time = durationTime / 16 in sec
		 		  	  messageParams[5] = 2;
		 		  	  SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		 		  	  break;
		  case 2:

		  			  //freq
		  			  messageParams[0] = (uint8_t)(300>>24);
		  			  messageParams[1] = (uint8_t)(300>>16);
		  			  messageParams[2] = (uint8_t)(300>>8);
		  			  messageParams[3] = (uint8_t)(300);
		  			  // MusicNotesNumOfSamples
		  			  messageParams[4] = sample;
		  			  // durationInSeconds 2 sec
		  			  //Note: time Division 16 in sec
		  			  //Time = durationTime / 16 in sec
		  			  messageParams[5] = 2;
		  			  SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		  			  break;
          case 3:
        	  	//freq
        	    messageParams[0] = (uint8_t)(500>>24);
        	  	messageParams[1] = (uint8_t)(500>>16);
        	  	messageParams[2] = (uint8_t)(500>>8);
        	  	messageParams[3] = (uint8_t)(500);
        	  	// MusicNotesNumOfSamples
        	  	messageParams[4] = sample;
        	  	// durationInSeconds 2 sec
        	  	messageParams[5] = 2;
        	  	SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);	  
		  		  	break;
          case 4:
        	  	//freq
		  		  	messageParams[0] = (uint8_t)(700>>24);
		  		  	messageParams[1] = (uint8_t)(700>>16);
		  		  	messageParams[2] = (uint8_t)(700>>8);
		  		  	messageParams[3] = (uint8_t)(700);
		  		  	// MusicNotesNumOfSamples
		  		  	messageParams[4] = sample;
		  		  	// durationInSeconds 2 sec
		  		  	messageParams[5] = 2;
		  		  	SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		  		  	break;
		  case 5:
              //freq
		  		  	messageParams[0] = (uint8_t)(1000>>24);
		  		    messageParams[1] = (uint8_t)(1000>>16);
		  		    messageParams[2] = (uint8_t)(1000>>8);
    	  			messageParams[3] = (uint8_t)(1000);
		  		    // MusicNotesNumOfSamples
		  		    messageParams[4] = sample;
		  		    // durationInSeconds 2 sec
		  		    messageParams[5] = 2;
		  		    SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		  		    break;
		  case 6:
              //freq
		  		  	messageParams[0] = (uint8_t)(1500>>24);
		  		  	messageParams[1] = (uint8_t)(1500>>16);
		  		  	messageParams[2] = (uint8_t)(1500>>8);
		      	  messageParams[3] = (uint8_t)(1500);
		  		  	// MusicNotesNumOfSamples
		  		  	messageParams[4] = sample;
		  		  	// durationInSeconds 2 sec
		  		  	messageParams[5] = 2;
		  		    SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		  		  	break;	  	
		  case 7:
              //freq
		  		  	messageParams[0] = (uint8_t)(3000>>24);
		  		  	messageParams[1] = (uint8_t)(3000>>16);
		  		  	messageParams[2] = (uint8_t)(3000>>8);
		      	  messageParams[3] = (uint8_t)(3000);
		  		  	// MusicNotesNumOfSamples
		  		  	messageParams[4] = sample;
		  		  	// durationInSeconds 2 sec
		  		  	messageParams[5] = 2;
		  		  	SendMessageToModule (2,CODE_H07R3_PLAY_SINE, 6);
		  		  	break;

		  defult :
				      break;
	  }
  }
}

uint8_t AbsDistanceToColor(float distance)
{


	if (distance < 15.0f)
		return 1;
	else if (distance < 20.0f)
		return 2;
	else if (distance < 25.0f)
		return 3;
	else if (distance < 30.0f)
	  	return 4;
	else if (distance < 35.0f)
	  	return 5;
	else if (distance < 40.0f)
	  	return 6;
	else if (distance < 45.0f)
		return 7;
	else
		return 8;


}

Credits

Abdulrhman Batikh

1 project • 1 follower

Distance Sensor Alarm

Things used in this project

Hardware components

Story

Idea

HOW TO BUILD IT

Code

H08R6 (IR sensor)

Credits

Abdulrhman Batikh

Comments

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Distance Sensor Alarm

Distance Sensor Alarm

Things used in this project

Hardware components

Story

Idea

HOW TO BUILD IT

Code

H08R6 (IR sensor)

Credits

Abdulrhman Batikh

Comments

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