LUX-Light LED by David Axt

Example of 6 BH1750 combined together with one Arduino UNO

davidaxt1 — 2021-01-14 12:47:46 UTC

Arduino Nano wired with BH1750

davidaxt1 — 2021-01-14 12:48:22 UTC

This was our final decison because the Arduino Nano is compact and suitable for the fine cables and holes of the 3D-Printed-Work

Soldering of the wires and components

davidaxt1 — 2021-01-14 12:49:08 UTC

Code programming

davidaxt1 — 2021-01-14 12:49:49 UTC

Planning and realization of the signed pictures and drawings

davidaxt1 — 2021-01-14 12:50:15 UTC

Arduino UNO wired with BH1750

davidaxt1 — 2021-01-14 12:52:28 UTC

OUR EXERCISE

davidaxt1 — 2021-01-14 13:11:48 UTC

Our task is to write a program that independently produces the appropriate brightness for the plants. We also have to fix the sensors in a suitable place. The LED rings will be soldered with cables and then connected as well. We will coordinate with the other two groups so that we pull our cables through the same drilled holes and thus get as few problems as possible in the assembly.

First steps

tiemo — 2021-01-21 10:29:02 UTC

At the begin we split our group in two sections. One of them worked on the programming of the led ring and the other had to figure out how to get the data of the lux sensor.

tiemo — 2021-01-21 10:32:47 UTC

After each group finished, we planned on how to put our research together.

tiemo — 2021-01-21 10:34:58 UTC

While combining our preresults we encountered some problems with the hardware. This was the reason why our plan of implementing 8 light sensors failed and we had to do a new one.

tiemo — 2021-01-21 10:38:14 UTC

After that we decided to use only 4 light sensors but for this we had to use two Arduino Nano.

Big Picture

davidaxt1 — 2021-01-21 10:38:44 UTC

Our Code

tiemo — 2021-01-21 10:39:57 UTC

Our code uses two main libraries the BH1750 for the light sensor, and FastLedMaster for the LED ring.

With those libraries we were able to read the data from the light sensor. The data we used to control the light by looking to keep the lux level between 790-800 lux.

The raw diagram

jenwie126 — 2021-01-21 10:40:16 UTC

This is our plan. But when we sticked it together, the arduino nano burned through.Then we had to think about putting the LED ring on an external power supply.

Start

davidaxt1 — 2021-01-21 11:31:52 UTC

Our Quellcode

tiemo — 2021-02-12 10:03:57 UTC

#include
#include
#include

#define LED_PIN 7
#define NUM_LEDS 60

BH1750 bh1750_a;
BH1750 bh1750_b;
CRGB leds[NUM_LEDS];

void setup(){

Serial.begin(9600);
Wire.begin();
bh1750_a.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x23);
bh1750_b.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x5C);

FastLED.addLeds(leds, NUM_LEDS);
}

void loop() {

//Variablen
int helligkeit_1;
int helligkeit_2;
double max_ = 800.00;
double min_ = 750.00;
bool Beenden = true;

do{
float lux_1 = bh1750_a.readLightLevel();
float lux_2 = bh1750_b.readLightLevel();
bool stop = false;

do{
if (lux_1 < min_)
{
if (helligkeit_1 < 255)
{
helligkeit_1++;
licht(helligkeit_1, helligkeit_2);
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}

else if (lux_1 > max_)
{
if ( helligkeit_1 != 0)
{
helligkeit_1--;
licht(helligkeit_1, helligkeit_2);
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}while(stop);

stop = false;

do{
if (lux_2 < min_)
{
if (helligkeit_2 < 255)
{
helligkeit_2++;
licht(helligkeit_1, helligkeit_2);
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}

else if (lux_2 > max_)
{
if ( helligkeit_2 != 0)
{
helligkeit_2--;
licht(helligkeit_1, helligkeit_2);
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}
else
{
licht(helligkeit_1, helligkeit_2);
}
}while(stop);

//Ausgabe Lux Werte
Serial.print("Lux_1 Wert: ");
Serial.print(lux_1);
Serial.print(" | ");
Serial.print("LED_1 Wert: ");
Serial.print(helligkeit_1);
Serial.print(" || ");
Serial.print("Lux_2 Wert: ");
Serial.print(lux_2);
Serial.print(" | ");
Serial.print("LED_2 Wert: ");
Serial.print(helligkeit_2);
Serial.println();
//delay(50);

}while(Beenden);
}

void licht(int helligkeit_1, int helligkeit_2)
{
for (int i = 0; i <= 59; i++)
{
if (i <30)
{
leds[i] = CHSV (255,0,helligkeit_1);
FastLED.show();
}
else
{
leds[i] = CHSV (255,0,helligkeit_2);
FastLED.show();
}
}
}