Alexia Transteven eaLorette DaussyIsmael Costel
Published © GPL3+

B-Hive

B-Hive is an autonomous electronic monitoring device enabling beekeepers to oversee their hives' well-being.

IntermediateWork in progress368
B-Hive

Things used in this project

Hardware components

Nucleo 144 STM32F7
ST STM32L4, STM32F7 Nucleo 144 STM32F7
×1
Adafruit Waterproof DS18B20 Digital temperature sensor
Adafruit Waterproof DS18B20 Digital temperature sensor
×4
DHT22 temperature-humidity sensor
Adafruit DHT22 temperature-humidity sensor
×1
SparkFun Load Cell Amplifier - HX711
SparkFun Load Cell Amplifier - HX711
×1
Strain gauge
×1
Antenna + Sigfox BRKWSO1-RC1
×1
Battery Accu Li-Ion 3.7 V PR474446
×1
Seeed Lipo Rider Pro 106990008
×1
Solar Panel - SOL3W
×1
Grove Connector
×5
Toggle Switch, Toggle
Toggle Switch, Toggle
×1
STMicroelectronics IoT discovery kit ST B-L475E-IOT01A
×1

Software apps and online services

Mbed Studio
Arm Mbed Studio
KiCad
KiCad
Sigfox
Sigfox
Ubidots
Ubidots

Hand tools and fabrication machines

Bantam Tools Desktop PCB Milling Machine
Bantam Tools Desktop PCB Milling Machine
Soldering Station, 110 V
Soldering Station, 110 V
PCB Holder, Soldering Iron
PCB Holder, Soldering Iron
Solder Wire, Lead Free
Solder Wire, Lead Free
Cable Cutter, 12.7mm
Cable Cutter, 12.7mm
Hot glue gun (generic)
Hot glue gun (generic)
Drill / Driver, Cordless
Drill / Driver, Cordless
Mastech MS8217 Autorange Digital Multimeter
Digilent Mastech MS8217 Autorange Digital Multimeter

Story

Read more

Schematics

Kicad Projet

Download Kicad software, and open the project file provided.

Code

Software

C/C++
Compile the code provided with Mbed or Mbed Online Compiler.
#include "mbed.h"
#include "DHT.h"
#include "DS1820.h"
#include "HX711.h"

#define   DHT1_DATA_PIN  D6
#define   DHT2_DATA_PIN  D9

DS1820      ds1820_1(D2);  // substitute D8 with the actual pin name connected to the DS1820 sensor
DS1820      ds1820_2(D3);
DS1820      ds1820_3(D4);
DS1820      ds1820_4(D5);
AnalogIn Batterie(A6);
float       temp1 = 0;
float       temp2 = 0;
float       temp3 = 0;
float       temp4 = 0;
int         result = 0;
int batterie_level = 0;

DHT sensor1(DHT1_DATA_PIN, DHT22);                    //DHT(PinName pin, eType DHTtype)
DHT sensor2(DHT2_DATA_PIN, DHT22);                    //DHT(PinName pin, eType DHTtype)
HX711 loadcell(D12, D11);

Serial pc(USBTX, USBRX); // tx, rx
Serial device(D1, D0); // tx, rx

int main()
{
    float x =0.0f;;
    int error1 = 0;
    int error2 = 0;
    float h_int = 0.0f, c_int = 0.0f,h_ext = 0.0f,c_ext =0.0f;
    float balance=0.2f;
    pc.baud(9600);
    device.baud(9600);
    
    if (!ds1820_1.begin()){
        pc.printf("No DS1820 sensor found!\r\n");
        for(int i=0; i<10; i++)
        {
            ThisThread::sleep_for(250);
            if(ds1820_1.begin())
            {
                pc.printf("DS1820 sensor found on %d try\r\n", i+2);
                break;
            }
        }
    }
    else{
        pc.printf("DS1820 sensor found!\r\n");
    }
    
    if (!ds1820_2.begin()){
        pc.printf("No DS1820 sensor found!\r\n");
        for(int i=0; i<10; i++)
        {
            ThisThread::sleep_for(250);
            if(ds1820_2.begin())
            {
                pc.printf("DS1820 sensor found on %d try\r\n", i+2);
                break;
            }
        }
    }
    else{
        pc.printf("DS1820 sensor found!\r\n");
    }
    if (!ds1820_3.begin()){
        pc.printf("No DS1820 sensor found!\r\n");
        for(int i=0; i<10; i++)
        {
            ThisThread::sleep_for(250);
            if(ds1820_3.begin())
            {
                pc.printf("DS1820 sensor found on %d try\r\n", i+2);
                break;
            }
        }
    }
    else{
        pc.printf("DS1820 sensor found!\r\n");
    }
    if (!ds1820_4.begin()){
        pc.printf("No DS1820 sensor found!\r\n");
        for(int i=0; i<10; i++)
        {
            ThisThread::sleep_for(250);
            if(ds1820_4.begin())
            {
                pc.printf("DS1820 sensor found on %d try\r\n", i+2);
                break;
            }
        }
    }
    else{
        pc.printf("DS1820 sensor found!\r\n");
    }

    while(1) {
        x=Batterie.read();

        if (x > 0.81 )
        {
            batterie_level = 75;  
        }
        else if (x > 0.75 )
        {
            batterie_level = 50;  
        }
        else if (x > 0.70 )
        {
            batterie_level = 25;  
        }
        else 
        {
            batterie_level = 0;
        }

        int balance = ((loadcell.getValue() - 8469461)/21.5);
        pc.printf("Weight = %d\r\n", balance);
        
        ds1820_1.startConversion();   // start temperature conversion from analog to digital
        ds1820_2.startConversion();   // start temperature conversion from analog to digital
        ds1820_3.startConversion();   // start temperature conversion from analog to digital
        ds1820_4.startConversion();   // start temperature conversion from analog to digital

        ThisThread::sleep_for(1000);// let DS1820 complete the temperature conversion
        
        result = ds1820_1.read(temp1); // read temperature from DS1820 and perform cyclic redundancy check (CRC)
        result = ds1820_2.read(temp2);
        result = ds1820_3.read(temp3);
        result = ds1820_4.read(temp4);
        
        error1 = sensor1.readData();                  //read error value
        error2 = sensor2.readData();                  //read error value
            
        c_int   = sensor1.ReadTemperature(CELCIUS);
        h_int   = sensor1.ReadHumidity();
       
        c_ext   = sensor2.ReadTemperature(CELCIUS);
        h_ext   = sensor2.ReadHumidity();
        
        pc.printf("test 2\r\n\n");
        
        pc.printf("DHT1_temp = %4.2f\r\n", c_int);  // on affiche les valeurs sur teraTerm pour debug
        pc.printf("DHT1_h = %4.2f\r\n", h_int);
        pc.printf("DHT2_temp = %4.2f\r\n", c_ext);
        pc.printf("DHT2_h = %4.2f\r\n", h_ext);
        pc.printf("ds1 = %4.2f\r\n", temp1);
        pc.printf("ds2 = %4.2f\r\n", temp2);
        pc.printf("ds3 = %4.2f\r\n", temp3);
        pc.printf("ds4 = %4.2f\r\n", temp4);
        pc.printf("batterie = %d\r\n", batterie_level);
        
        device.printf("AT$SF=%02X%02X%02X%02X%02X%02X%02X%02X%04X\r\n",(char) c_ext,(char) h_ext, (char) c_int, (char) h_int,(char) temp1,(char) temp2,(char) temp3,(char) temp4, balance);
        pc.printf("AT$SF=%02X%02X%02X%02X%02X%02X%02X%02X%04X%02X\r\n",(char) c_ext,(char) h_ext, (char) c_int, (char) h_int,(char) temp1,(char) temp2,(char) temp3,(char) temp4, balance, (char) batterie_level);

        ThisThread::sleep_for(600000);
    }
}

Credits

Alexia Tran

Alexia Tran

1 project • 0 followers
steven ea

steven ea

0 projects • 0 followers
Lorette Daussy

Lorette Daussy

0 projects • 0 followers
Ismael Costel

Ismael Costel

0 projects • 0 followers

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