Steps

Published February 17, 2022 © GPL3+

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This project is about building a monitoring system using Hexabitz modules

IntermediateFull instructions provided3 hours190

Things used in this project

Hardware components

Hexabitz 4-Pin USB-Serial Prototype Cable

Hexabitz Bluetooth V4.0 Dual Mode Module (H23R10)

Hexabitz AC Current and Voltage Sensor (H2AR3)

Hexabitz SPDT Mechanical DC Relay (H0FR1x)

CRC8420

Software apps and online services

STMicroelectronics STM32CUBEPROG

Story

The goal of this project is to build a small system that allows you to monitor any electrical device, measure both current and voltage ( AC ), control it remotely (ON / OFF) and finally protect it from overload (all with your smartphone).

1 / 2

Steps:

The steps are quite simple: first, we develop an Android app that sends and receives data via Bluetooth. Then we use the Hexabitz H2AR3 module, which gives us the current and voltage measurements that can then be sent to your phone via the H23R0x Bluetooth module. Finally, we need the H0FRxx relay module to turn our device on and off.

So let us go through the app with MIT app inventor

Here is a picture of the designed screen

Now we go to the block area and here is the part for connecting to Bluetooth and sending the values that we will use to turn our device on and off

here is the part for receiving the data

and here we can record the current to the changes in the curve

Before we begin, we need to load the firmwares of the three modules and open them on STM32CubeIDE. Now let us go to the modules where we need to set the topology file.

First note that this file must be the same in each module.

After that, we should give each module a ID:

H2AR3x : 1

H23R0x : 2

H0FRxx : 3

Navigate to the properties of each element and give them the ID

Now go to the user file in H2AR3 and double click on main.c and write the code. First we need to add the variables we want to share with other modules

then we take samples of the voltages and calculate their RMS value and send it to the Bluetooth module

after that we take samples of the current, calculate its RMS value and send it to the Bluetooth module

In the Bluetooth module we need to set the Bluetooth detectability, add the same common variables and make the module ready to receive data.

Here we send the date to the app in the same way we created the app

Finally, we turn the device on or off depending on what we are sending and how high the value of the current

#include "BOS.h"




 uint8_t buffer;
volatile float I;
volatile float V;
float timeout=60000;
uint8_t MESGA[6] = {"\0"};
uint8_t MESGV[7] = {"\0"};


int main(void){

	Module_Init();		//Initialize Module &  BitzOS

	//Don't place your code here.
	for(;;){}
}



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



	 BT_Set_Discoverable();

     AddBOSvar(FMT_FLOAT, (uint32_t)&V);
     AddBOSvar(FMT_FLOAT, (uint32_t)&I);

	 BT_Receive_Data((uint8_t *)&buffer,1);

	while(1)
	{



		 BT_Send_Data("label|",6);


		 sprintf(MESGA, "%.1f", I);
		 sprintf(MESGV, "%.2f\r\n", V);

		 BT_Send_Data((uint8_t*)MESGA,3);
		 BT_Send_Data("|",1);
		 BT_Send_Data((uint8_t*)MESGV,6);

		 Delay_ms(260);


		 if(buffer=='4')
		   {
			 if(I<11)
			 {
				  memcpy(&messageParams[0],&timeout,4);
			      SendMessageToModule(2,CODE_H0FRx_ON,4);
			 }
			    else  SendMessageToModule(2,CODE_H0FRx_OFF,0);

		   }
		   else if(buffer=='5')
		   {
		  	   	 SendMessageToModule(2,CODE_H0FRx_OFF,0);
		   }



		}

	}

 #include "BOS.h"

 #define max_v 180
 float volt,curr ,sum,sum_v,Ibuff[]={0},Vbuff[]={0};
 volatile float V,I;
 int j=0,i=0;


int main(void){

	Module_Init();


	for(;;){}
}



void UserTask(void *argument)
{

	   BOSMessaging.trace=TRACE_NONE;

	   AddBOSvar(FMT_FLOAT, (uint32_t)&V);
	   WriteRemote(3, (uint32_t) &V, 1, FMT_FLOAT,0);

	   AddBOSvar(FMT_FLOAT, (uint32_t)&I);
	   WriteRemote(3, (uint32_t) &I, 2, FMT_FLOAT,0);



	while(1)
	{

			   SampleV(&volt);

			   if(volt>max_v)     //Calculate Vrms
			      {
				   for(i=0;i<3;i++)
				   {
					   Vbuff[i]=volt;
					   sum_v+= Vbuff[i];
				   }

				   sum_v= sum_v/3;
			       sum_v= sum_v/1.414;

			      }
			          V=sum_v;
			          i=0;


			   WriteRemote(3, (uint32_t) &V, 1, FMT_FLOAT,0);
			   Delay_ms(20);


			   SampleA(&curr);

             if(j<3)     //Calculate Irms
               {
            	   Ibuff[j]=curr;
            	   sum+=pow(Ibuff[j],2);
            	   sum= sum/3;
            	   sum=sqrt(sum);

            	   j++;

               }
                   j=0;
                   I= sum;
                   Delay_ms(50);

			       WriteRemote(3, (uint32_t) & I, 2, FMT_FLOAT,0);
  	               Delay_ms(20);

	}
}

/*
 BitzOS (BOS) V0.2.6 - Copyright (C) 2017-2022 Hexabitz
 All rights reserved

 File Name     : topology.h
 Description   : Array topology definition.

 */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __topology_H
#define __topology_H
#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"

#define __N	3					// Number of array modules

// Array modules
#define _mod1	1<<3
#define _mod2	2<<3
#define _mod3	3<<3
// Topology
static uint16_t array[__N ][7] ={
	{_H2AR3, 0,  0, _mod3 | P5, 0, 0, 0}, 						 // Module 1
	{_H0FR1,0, 0,0, _mod3 | P2, 0},	                        // Module 2
	{_H23R1, 0,_mod2 | P4, 0, 0, _mod1 | P3, 0},	               // Module 3
};

// Configurations for duplex serial ports
#if ( _module == 1 )
	#define	H2AR3	1
	#define	_P1pol_normal	1
	#define	_P2pol_normal	1
	#define	_P3pol_normal	1
	#define	_P4pol_normal	1
	#define	_P5pol_normal	1
	#define	_P6pol_normal	1
#endif

#if ( _module == 2 )
	#define	H0FR1	1
	#define	_P1pol_normal	1
	#define	_P2pol_normal	1
	#define	_P3pol_normal	1
	#define	_P4pol_reversed	1
	#define	_P5pol_normal	1
	#define	_P6pol_normal	1

#endif

#if ( _module ==3 )
	#define	H23R1	1
	#define	_P1pol_normal	1
	#define	_P2pol_normal	1
	#define	_P3pol_normal	1
	#define	_P4pol_normal	1
	#define	_P5pol_reversed	1
	#define	_P6pol_normal	1

#endif

#ifdef __cplusplus
}
#endif
#endif /*__ topology_H */

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

Smart Outlet

Things used in this project

Hardware components

Software apps and online services

Story

Steps:

Code

H23R0x.txt

H2AR3x.txt

topology.txt

Credits

Subhi Kalzie

Comments

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Things used in this project

Hardware components

Software apps and online services

Story

Steps:

Code

H23R0x.txt

H2AR3x.txt

topology.txt

Credits

Subhi Kalzie

Comments

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