Hi guys,
I am trying to control a 8 channel relay with with two ultrasonic distance sensors. Basically what I want to do is have one sensor on top of my stair and one at the bottom. If for eg. downstairs sensor detects distance is >70 then it will turn on the relays (1,2,3,4,5,6,7,8,9,10,11,12,13) each relay will turn on one after the other with delay of 500ms and then at the end all will stay on for 5 sec. If the top sensor will detect distance >70 then it will turn on the relays (13,12,11,10,9,8,7,6,5,4,3,2,1).
Basically this code is close enough to what I am trying to do.
/*
* Arduino code to control 16 channel relay with Arduino UNO
*
* Written by Ahmad Shamshiri for Robojax.com on Sunday Oct 08, 2018
* at 10:35 in Ajax, Ontario, Canada
* Watch video instruction for this code: https://youtu.be/Q9aBI4ELKC4
*
* This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
* This code has been download from Robojax.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
const int controlPin[16] = {2,3,4,5,6,7,8,9,10,11,12,A0,A1,A2,A3,A4}; // define pins
const int triggerType = LOW;// your relay type
int loopDelay = 1000;// delay in loop
int tmpStat =1;
void setup() {
for(int i=0; i<16; i++)
{
pinMode(controlPin[i], OUTPUT);// set pin as output
if(triggerType ==LOW){
digitalWrite(controlPin[i], HIGH); // set initial state OFF for low trigger relay
}else{
digitalWrite(controlPin[i], LOW); // set initial state OFF for high trigger relay
}
}
Serial.begin(9600);// initialize serial monitor with 9600 baud
}
void loop() {
for(int i=0; i<16; i++)
{
channelControl(i,tmpStat,200);// turn each relay ON for 200ms
}
if(tmpStat)
{
tmpStat=0;
}else{
tmpStat=1;
}
Serial.println("===============");
//channelControl(6,1, 2000); // turn relay 7 ON for 2 seconds
//channelControl(6,0, 5000); // turn relay 7 OFF for 5 seconds
//channelControl(9,1, 3000); // turn relay 10 OFF forC ever
delay(loopDelay);// wait for loopDelay ms
}
/*
* funciton: channelControl
* turns ON or OFF specific relay channel
* @param relayChannel is integer value channel from 0 to 15
* @param action is 1 for ON or 0 for OFF
* @param t is time in melisecond
*/
void channelControl(int relayChannel, int action, int t)
{
int state =LOW;
String statTXT =" ON";
if(triggerType == LOW)
{
if (action ==0)// if OFF requested
{
state = HIGH;
statTXT = " OFF";
}
digitalWrite(controlPin[relayChannel], state);
if(t >0 )
{
delay(t);
}
Serial.print ("Channel: ");
Serial.print(relayChannel);
Serial.print(statTXT);
Serial.print(" - ");
Serial.println(t);
}else{
if (action ==1)// if ON requested
{
state = HIGH;
}else{
statTXT = " OFF";
}
digitalWrite(controlPin[relayChannel], state);
if(t >0 )
{
delay(t);
}
Serial.print ("Channel: ");
Serial.print(relayChannel);
Serial.print(statTXT);
Serial.print(" - ");
Serial.println(t);
}
}
But this is on a loop and I would want it to run once when the sensor detects someone.
This is another code I found that that uses the sensor to turn on one relay.
#define trigPin 6 //Define the HC-SE04 triger on pin 6 on the arduino
#define echoPin 5 //Define the HC-SE04 echo on pin 5 on the arduino
#define bulb 9 //Define the relay signal on pin 9 on the arduino
void setup()
{
Serial.begin (9600); //Start the serial monitor
pinMode(trigPin, OUTPUT); //set the trigpin to output
pinMode(echoPin, INPUT); //set the echopin to input
pinMode (bulb, OUTPUT); //set the bulb on pin 9 to output
}
void loop()
{
int duration, distance; //Define two intregers duration and distance to be used to save data
digitalWrite(trigPin, HIGH); //write a digital high to the trigpin to send out the pulse
delayMicroseconds(500); //wait half a millisecond
digitalWrite(trigPin, LOW); //turn off the trigpin
duration = pulseIn(echoPin, HIGH); //measure the time using pulsein when the echo receives a signal set it to high
distance = (duration/2) / 29.1; //distance is the duration devided by 2 becasue the signal traveled from the trigpin then back to the echo pin, then divide by 29.1 to convert to centimeters
if (distance < 13) //if the distance is less than 13 CM
{
Light(); //execute the Light subroutine below
}
Serial.print(distance); //Dispaly the distance on the serial monitor
Serial.println(" CM"); //in centimeters
delay(500); //delay half a second
}
void Light() //Start the Light subroutine
{ digitalWrite(bulb, HIGH); //turn on the light
delay (15000); //wait 15 seconds
digitalWrite(bulb, LOW); //turn off the light
}
Is there anyway to make one out of it to do what I have in mind ?
