Hi, I'm building a machine for a computer processing class that is a wave tank that generates waves based on two different modes.
The project is based on these two projects I found online:
In one mode the tank generates waves based on your hand's proximity to the proximity sensor. In the other mode the tank generates waves based on readings from a rss feed. I'm having some problems tho.
a) The ethernet mode based on the buoy just doesn't work. The servos just click and don't really move and the LEDs don't light up based on the Significant wave height.
b) Proximity mode works, but there is a large lag. For instance, the waves can be going really slow and I'll put my hand really close. Then it will take a few seconds for the Arduino to speed up the servos and change the LED instead of doing it faster.
Any help would be greatly appreciated.
These are the parts im using
[Amazon.com](http://green led button)
Here is my code:
//variable for proximity sensor reads
int trigPin = 11; // Trigger
int echoPin = 12; // Echo
long duration, cm, inches;
//Servo
//import the library
#include <Servo.h>
//declare servos
//pin 5
Servo servoLeft;
//pin 6
Servo servoRight;
//Servo position variables
int pos = 20;
int post = 160;
int back = 20;
int forward = 160;
//speed
int spe;
//LED Variables
int red = 2;
int green = 3;
int blue = 4;
//Ethernet
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
char serverName[] = "ndbc.noaa.gov";
EthernetClient client;
float waveHeight; // float value that holds wave height
void setup() {
//declare ins and outs of blue led button
pinMode(13, OUTPUT); //led in button
pinMode(10, INPUT); //button to change mode from buoy to proximity
Serial.begin(9600);
//attach servos
servoLeft.attach(5);
servoRight.attach(6);
//declare input/output of proximity sensor
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
//declare LED outputs
pinMode(red, OUTPUT);
pinMode(green, OUTPUT);
pinMode(blue, OUTPUT);
//Ethernet
if (Ethernet.begin(mac) == 0)
{ // start ethernet using mac & IP address
while(true) ;
}
delay(2000); // give the Ethernet shield 2 second to initialize
//Declare all LEDs off to begin
digitalWrite(red, LOW);
digitalWrite(green, LOW);
digitalWrite(blue, LOW);
//Set Servos to base position
servoLeft.write(back);
servoRight.write(back);
}
void loop() {
//Set serial to print proximity sensor data
Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
//Move servos and have speed correspond to speed. If statements in buoy will change speed based on wave height and in handMode will change based on proximity.
for (pos = back; pos <= forward; pos += 1) {
servoLeft.write(pos);
servoRight.write(pos);
delay(spe);
}
for (pos = forward; pos >= back; pos -= 1) {
servoLeft.write(pos);
servoRight.write(pos);
delay(spe);
}
//if blue button pushed then use proximity sensor to create wave speed
if (digitalRead(10) == HIGH) {
digitalWrite(13, HIGH);
//use proxity sensor
// The sensor is triggered by a HIGH pulse of 10 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Read the signal from the sensor: a HIGH pulse whose
// duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
// Convert the time into a distance
cm = (duration/2) / 29.1; // Divide by 29.1 or multiply by 0.0343
inches = (duration/2) / 74; // Divide by 74 or multiply by 0.0135
//based on proximity sensor readings, set wave speed accordingly; the closer object the faster the waves
if ((inches>=0) && (inches <1)) {
spe = 1;
} else if ((inches>=1) && (inches <2)) {
spe = 2;
} else if ((inches>=2) && (inches <3)) {
spe = 3;
} else if ((inches>=3) && (inches <4)) {
spe = 4;
} else if ((inches>=4) && (inches <5)) {
spe = 5;
} else if ((inches>=5) && (cm <inches)) {
spe = 6;
} else if ((inches>=6) && (inches <7)) {
spe = 7;
} else if ((inches>=7) && (inches <8)) {
spe = 8;
} else if ((inches>=8) && (inches <9)) {
spe = 9;
} else if ((inches>=9) && (inches <10)) {
spe = 10;
} else if ((inches>=10) && (inches <11)) {
spe = 11;
} else if ((inches>=11) && (inches <12)) {
spe = 12;
} else if ((inches>=12) && (inches <13)) {
spe = 13;
} else if ((inches>=13) && (inches <14)) {
spe = 14;
} else if ((inches>=14) && (inches <15)) {
spe = 15;
} else if ((inches>=15) && (inches <16)) {
spe = 16;
} else if ((inches>=16) && (inches <17)) {
spe = 17;
} else if ((inches>=17) && (inches <18)) {
spe = 18;
} else if ((inches>=18) && (inches <19)) {
spe = 19;
} else if ((inches>=19) && (inches <20)) {
spe = 20;
} else if ((inches>=20) && (inches <21)) {
spe = 21;
} else if ((inches>=21) && (inches <100)) {
spe = 22;
}
//after 21 inches it felt kind of irrelevant
//light up RGB depending on proximity
if ((inches>=10)&&(inches<100)) {
digitalWrite(red ,LOW);
digitalWrite(green ,LOW);
digitalWrite(blue ,HIGH);
}
if ((inches>=4)&&(inches<10)) {
digitalWrite(red ,LOW);
digitalWrite(green ,HIGH);
digitalWrite(blue ,LOW);
}
if ((inches>=0)&&(inches<4)) {
digitalWrite(red ,HIGH);
digitalWrite(green ,LOW);
digitalWrite(blue ,LOW);
}
//if the button isn't pushed, the wave speed of the tank will be determined upon the waves from live buoy data
} else {
digitalWrite(13, LOW);
inches = 100;
cm = 200;
//use buoy
//this code grabs the wave height and puts in within the variable
if (client.connect(serverName, 80)>0) {
client.println("GET https://www.ndbc.noaa.gov/data/latest_obs/44097.rss");
}
if (client.connected()) {
if(client.find("Significant Wave Height:")) {
//look for the wave height and pass the value to variable
waveHeight = client.parseFloat();
}
}
//light up RGB depending on waveHeight
if ((waveHeight>=0)&&(waveHeight<3)) {
digitalWrite(red ,LOW);
digitalWrite(green ,LOW);
digitalWrite(blue ,HIGH);
}
if ((waveHeight>=3)&&(waveHeight<8)) {
digitalWrite(red ,LOW);
digitalWrite(green ,HIGH);
digitalWrite(blue ,LOW);
}
if ((waveHeight>=8)&&(waveHeight<100)) {
digitalWrite(red ,HIGH);
digitalWrite(green ,LOW);
digitalWrite(blue ,LOW);
}
//set speed based on varying waveHieghts
if ((waveHeight>=0) && (waveHeight <1)) {
spe = 12;
} else if ((waveHeight>=1) && (waveHeight <2)) {
spe = 8;
} else if ((waveHeight>=2) && (waveHeight <3)) {
spe = 7;
} else if ((waveHeight>=3) && (waveHeight <4)) {
spe = 6;
} else if ((waveHeight>=4) && (waveHeight <5)) {
spe = 5;
} else if ((waveHeight>=5) && (waveHeight <6)) {
spe = 4;
} else if ((waveHeight>=6) && (waveHeight <7)) {
spe = 3;
} else if ((waveHeight>=7) && (waveHeight <8)) {
spe = 2;
} else if ((waveHeight>=8) && (waveHeight <100)) {
spe = 1;
}*/
}
}
