I'm brand new to programing all together and my trade school teacher bought me an Arduino solar tracking kit by Keyestudio for me to work on. After following the instructions for its assembly and typing out the code (essentially copy & pasting it word for word), I cannot get the kit to work by itself without needing a computer plugged into the Arduino board in order for the kit to work, even though it should be able to work by itself after having the code uploaded. I don't know if there's something wrong with the code or if something is wrong with the pins.
However, the wires used in the picture that connects the power module to power the main board (last assembly instruction or the picture before project 11) is different to the wires that came with the kit since the picture shows a red and brown wire, whereas the kit were it has a purple and grey wire and I don't know if that has something to do with it.
Link to the kit's assembly instructions and codes: KS0530 DIY Solar Tracking Kit — DIY Solar Tracking Kit documentation
keyestudio sun_follower
lesson 11
sun_follower
http://www.keyestudio.com
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#include <BH1750.h>
BH1750 lightMeter;
#include <dht11.h> //include the library code:
dht11 DHT;
#define DHT11_PIN 7 //define the DHT11 as the digital pin 7
#include <Servo.h>
Servo lr_servo;//define the name of the servo rotating right and left
Servo ud_servo;//define the name of the servo rotating upwards and downwards
const byte interruptPin = 2; //the pin of button;the corruption is disrupted
int lr_angle = 90;//set the initial angle to 90 degree
int ud_angle = 10;//set the initial angle to 10 degree;keep the solar panels upright to detect the strongest light
int l_state = A0;//define the analog voltage input of the photoresistors
int r_state = A1;
int u_state = A2;
int d_state = A3;
const byte buzzer = 6;
const byte lr_servopin = 9;
const byte ud_servopin = 10;
unsigned int light; //save the variable of light intensity
byte error = 15;//Define the error range to prevent vibration
byte m_speed = 10;//set delay time to adjust the speed of servo;the longer the time, the smaller the speed
byte resolution = 1; //set the rotation accuracy of the servo, the minimum rotation angle
int temperature; //save the variable of temperature
int humidity; //save the variable of humidity
void setup() {
Serial.begin(9600); //define the serial baud rate
// Initialize the I2C bus (BH1750 library doesn't do this automatically)
Wire.begin();
lightMeter.begin();
lr_servo.attach(lr_servopin); // set the control pin of servo
ud_servo.attach(ud_servopin); // set the control pin of servo
pinMode(l_state, INPUT); //set the mode of pin
pinMode(r_state, INPUT);
pinMode(u_state, INPUT);
pinMode(d_state, INPUT);
pinMode(interruptPin, INPUT_PULLUP); //the button pin is set to input pull-up mode
attachInterrupt(digitalPinToInterrupt(interruptPin), adjust_resolution, FALLING); //xternal interrupt touch type is falling edge; adjust_resolution is interrupt service function ISR
lcd.init(); // initialize the LCD
lcd.backlight(); //set LCD backlight
lr_servo.write(lr_angle);//return to initial angle
delay(1000);
ud_servo.write(ud_angle);
delay(1000);
}
void loop() {
// put your main code here, to run repeatedly:
ServoAction(); //servo performs the action
read_light(); //read the light intensity of bh1750
read_dht11(); //read the value of temperature and humidity
LcdShowValue(); //Lcd shows the values of light intensity, temperature and humidity
//erial monitor displays the resistance of the photoresistor and the angle of servo
/*Serial.print(" L ");
Serial.print(L);
Serial.print(" R ");
Serial.print(R);
Serial.print(" U ");
Serial.print(U);
Serial.print(" D ");
Serial.print(D);
Serial.print(" ud_angle ");
Serial.print(ud_angle);
Serial.print(" lr_angle ");
Serial.println(lr_angle);*/
// delay(1000);//During the test, the serial port data is received too fast, and it can be adjusted by adding delay time */
}
/**********the function of the servo************/
void ServoAction(){
int L = analogRead(l_state); //read the analog voltage value of the sensor, 0-1023
int R = analogRead(r_state);
int U = analogRead(u_state);
int D = analogRead(d_state);
/**********************system adjusting left and right序**********************/
// abs() is the absolute value function
if (abs(L - R) > error && L > R) {
lr_angle -= resolution;//reduce the angle
// lr_servo.attach(lr_servopin); // connect servo
if (lr_angle < 0) { //limit the rotation angle of the servo
lr_angle = 0;
}
lr_servo.write(lr_angle); //output the angle of the servooutput the angle of servo
delay(m_speed);
}
else if (abs(L - R) > error && L < R) { //Determine whether the error is within the acceptable range, otherwise adjust the steering gear
lr_angle += resolution;//increase the angle
// lr_servo.attach(lr_servopin); // connect servo
if (lr_angle > 180) { //limit the rotation angle of servo
lr_angle = 180;
}
lr_servo.write(lr_angle); //output the angle of servo
delay(m_speed);
}
else if (abs(L - R) <= error) { //Determine whether the error is within the acceptable range, otherwise adjust the steering gear
// lr_servo.detach(); //release the pin of servo
lr_servo.write(lr_angle); //output the angle of servo
}
/**********************system adjusting up and down**********************/
if (abs(U - D) > error && U >= D) {
ud_angle -= resolution;//reduce the angle
// ud_servo.attach(ud_servopin); // connect servo
if (ud_angle < 10) { //limit the rotation angle of servo
ud_angle = 10;
}
ud_servo.write(ud_angle); //output the angle of servo
delay(m_speed);
}
else if (abs(U - D) > error && U < D) { //Determine whether the error is within the acceptable range, otherwise adjust the steering gear
ud_angle += resolution;//increase the angle
// ud_servo.attach(ud_servopin); // connect servo
if (ud_angle > 90) { //limit the rotation angle of servo
ud_angle = 90;
}
ud_servo.write(ud_angle); //output the angle of servo
delay(m_speed);
}
else if (abs(U - D) <= error) { //Determine whether the error is within the acceptable range. If it is, keep it stable and make no change in angle
// ud_servo.detach(); //release the pin of servo
ud_servo.write(ud_angle); //output the angle of servo
}
}
void LcdShowValue() {
char str1[5];
char str2[2];
char str3[2];
dtostrf(light, -5, 0, str1); //Format the light value data as a string, left-aligned
dtostrf(temperature, -2, 0, str2);
dtostrf(humidity, -3, 0, str3);
//LCD1602 display
//display the value of the light intensity
lcd.setCursor(0, 0);
lcd.print("Light:");
lcd.setCursor(6, 0);
lcd.print(str1);
lcd.setCursor(11, 0);
lcd.print("lux");
//display the value of temperature and humidity
lcd.setCursor(0, 1);
lcd.print(temperature);
lcd.setCursor(2, 1);
lcd.print("C");
lcd.setCursor(5, 1);
lcd.print(humidity);
lcd.setCursor(7, 1);
lcd.print("%");
//show the accuracy of rotation
lcd.setCursor(11, 1);
lcd.print("res:");
lcd. setCursor(15, 1);
lcd.print(resolution);
/*if (light < 10) {
lcd.setCursor(7, 0);
lcd.print(" ");
lcd.setCursor(6, 0);
lcd.print(light);
} else if (light < 100) {
lcd.setCursor(8, 0);
lcd.print(" ");
lcd.setCursor(6, 0);
lcd.print(light);
} else if (light < 1000) {
lcd.setCursor(9, 0);
lcd.print(" ");
lcd.setCursor(6, 0);
lcd.print(light);
} else if (light < 10000) {
lcd.setCursor(9, 0);
lcd.print(" ");
lcd.setCursor(6, 0);
lcd.print(light);
} else if (light < 100000) {
lcd.setCursor(10, 0);
lcd.print(" ");
lcd.setCursor(6, 0);
lcd.print(light);
}*/
}
void read_light(){
light = lightMeter.readLightLevel(); //read the light intensity detected by BH1750
}
void read_dht11(){
int chk;
chk = DHT.read(DHT11_PIN); // read data
switch (chk) {
case DHTLIB_OK:
break;
case DHTLIB_ERROR_CHECKSUM: //check and return error
break;
case DHTLIB_ERROR_TIMEOUT: //Timeout and return error
break;
default:
break;
}
temperature = DHT.temperature;
humidity = DHT.humidity;
}
/*********function disrupts service**************/
void adjust_resolution() {
tone(buzzer, 800, 100);
delay(10); //delay to eliminate vibration
if (!digitalRead(interruptPin)){
if(resolution < 5){
resolution++;
}else{
resolution = 1;
}
}
}