system
August 22, 2014, 10:43am
1
I'm working on code that moves a servo 90 degrees when the correct password is entered on 4X4 keypad.I'm using an arduino duemilanove with 328 chip and a towerpro sg90 servo. I have used the command myservo.write(90) to turn the servo 90 degrees. I have placed this inside an if statement . However when the code executes, the servo goes to 90 degrees no matter what. I also tried resetting the servo to 0 degrees at the beginning of the loop, but it makes a horrible grinding noise because it is trying to switch from 0 to 90 and back so fast. please help!
if(digitalRead(5)==HIGH && i==8){
delay(250);
Serial.println('#');
pwcount=0;
for(k=0; k<=4; k++){
if(k==4){
Serial.println("Access Granted");
myservo.write(90);
delay(1000);
myservo.write(0);break;
}
if(password[k] != entry[k]){
Serial.println("Denied");
break;
}
}
for(k=0; k<10; k++)
entry[k]=0;
}
system
August 22, 2014, 10:51am
2
What do the serial debug prints tell you?
Have
it is
Try using auto format on your code before posting.
MarkT
August 22, 2014, 11:57pm
3
Formatting your code correctly will make the fault in it much more obvious.
How is your setup wired? You may have issues with pin 5 floating high. May be better to set pin 5 high, then pull it low with the button like in the below code.
//zoomkat servo button test 12-29-2011
// Powering a servo from the arduino usually *DOES NOT WORK*.
#include <Servo.h>
int button1 = 4; //button pin, connect to ground to move servo
int press1 = 0;
int button2 = 5; //button pin, connect to ground to move servo
int press2 = 0;
Servo servo1;
void setup()
{
pinMode(button1, INPUT);
pinMode(button2, INPUT);
servo1.attach(7);
digitalWrite(4, HIGH); //enable pullups to make pin high
digitalWrite(5, HIGH); //enable pullups to make pin high
}
void loop()
{
press1 = digitalRead(button1);
if (press1 == LOW)
{
servo1.write(170);
}
press2 = digitalRead(button2);
if (press2 == LOW)
{
servo1.write(10);
}
}
system
August 24, 2014, 2:50pm
5
Here is all of the code. Sorry about bad formatting in original post.
#include <Servo.h>
Servo myservo;
int i, k, pwcount=0;
char password[] = "1234", entry[10];
void setup()
{
Serial.begin(9600);
myservo.attach(10);
for(i=2; i<=5; i++)
pinMode(i, INPUT);
for(i=6; i<=8; i++)
pinMode(i, OUTPUT);
}
void loop()
{
for(i=6; i<=8; i++){
reset();
digitalWrite(i, HIGH);
if(digitalRead(2)==HIGH && i==6){
entry[pwcount] = '1';
pwcount++;
delay(250);
Serial.print('1');
}
if(digitalRead(3)==HIGH && i==6){
entry[pwcount] = '4';
pwcount++;
delay(250);
Serial.print('4');
}
if(digitalRead(4)==HIGH && i==6){
entry[pwcount] = '7';
pwcount++;
delay(250);
Serial.print('7');
}
if(digitalRead(5)==HIGH && i==6){
entry[pwcount] = '*';
pwcount++;
delay(250);
Serial.print('*');
}
if(digitalRead(2)==HIGH && i==7){
entry[pwcount] = '2';
pwcount++;
delay(250);
Serial.print('2');
}
if(digitalRead(3)==HIGH && i==7){
entry[pwcount] = '5';
pwcount++;
delay(250);
Serial.print('5');
}
if(digitalRead(4)==HIGH && i==7){
entry[pwcount] = '8';
pwcount++;
delay(250);
Serial.print('8');
}
if(digitalRead(5)==HIGH && i==7){
entry[pwcount] = '0';
pwcount++;
delay(250);
Serial.print('0');
}
if(digitalRead(2)==HIGH && i==8){
entry[pwcount] = '3';
pwcount++;
delay(250);
Serial.print('3');
}
if(digitalRead(3)==HIGH && i==8){
entry[pwcount] = '6';
pwcount++;
delay(250);
Serial.print('6');
}
if(digitalRead(4)==HIGH && i==8){
entry[pwcount] = '9';
pwcount++;
delay(250);
Serial.print('9');
}
if(digitalRead(5)==HIGH && i==8){
delay(250);
Serial.println('#');
pwcount=0;
for(k=0; k<=4; k++){
if(k==4){
Serial.println("Access Granted");
myservo.write(90);
delay(1000);
myservo.write(0);
break;
}
if(password[k] != entry[k]){
Serial.println("Denied");
break;
}
}
for(k=0; k<10; k++)
entry[k]=0;
}
}
}
void reset(){
int j;
for(j=6; j<=8; j++)
digitalWrite(j, LOW);
}
/* ==================================================================================
File: keypad_password_servo.ino
Author: Camilo Nuñez Fernandez
camilo.nunez@cnf.cl
Description: A control access with password, 4x4 keypad and a servo, for Arduino.
==================================================================================
// Ver | dd mmm yyyy | Author | Description
// =====|=============|=========|=====================================================
// 1.0 | 17 Jul 2012 | CNF | First release
// ==================================================================================
// 1.1 | 12 Ago 2014 | CNF | Second Version, compatible with Arduino 1.0
// ==================================================================================*/
#include <Password.h> //http://playground.arduino.cc/uploads/Code/Password.zip use password library
#include <Keypad.h> //http://www.arduino.cc/playground/uploads/Code/Keypad.zip //tells to use keypad library
#include <Servo.h> //tells to use servo library
Servo myservo; //declares servo
Password password = Password( "your_password" ); //password to unlock box, can be changed
const byte ROWS = 4; // Four rows
const byte COLS = 4; // columns
// Define the Keymap
char keys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = { 5, 4, 3, 2 };// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 8, 7, 6, 9 };
// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup(){
Serial.begin(9600);
Serial.write(254);
Serial.write(0x01);
delay(200);
pinMode(11, OUTPUT); //green light
pinMode(12, OUTPUT); //red light
myservo.attach(13); //servo on digital pin 9 //servo
keypad.addEventListener(keypadEvent); //add an event listener for this keypad
}
void loop(){
keypad.getKey();
myservo.write(0);
}
//take care of some special events
void keypadEvent(KeypadEvent eKey){
switch (keypad.getState()){
case PRESSED:
Serial.print("Enter: ");
Serial.println(eKey);
delay(10);
Serial.write(254);
switch (eKey){
case 'A': checkPassword(); delay(1); break;
case 'B': password.reset(); delay(1); break;
default: password.append(eKey); delay(1);
}
}
}
void checkPassword(){
if (password.evaluate()){ //if password is right open box
Serial.println("Accepted");
Serial.write(254);delay(10);
//Add code to run if it works
myservo.write(5); //160deg
digitalWrite(11, HIGH);//turn on
delay(500); //wait 5 seconds
digitalWrite(11, LOW);// turn off
}else{
Serial.println("Denied"); //if passwords wrong keep box locked
Serial.write(254);delay(10);
//add code to run if it did not work
myservo.write(0);
digitalWrite(12, HIGH); //turn on
delay(500); //wait 5 seconds
digitalWrite(12, LOW);//turn off
}
}
http://www.instructables.com/id/Access-control-with-Arduino-Keypad-4x4-Servo/
