remote-shutdown

Quickly shutdown, control machineries from a distance

control actuation of electro-pneumatics cylinder and relays

this project has been designed in other to reduce the risk of late shutdown or easily carry out task from the office using bluetooth technology and micro controllers

Components needed

Name	Qty
Arduino nano	1
Hc-05	1
5v dc power relay or solid state relay	1

Note

The amount of relays needed solely depends on the number of items you want to control
Always check the datasheet for the required voltage on the rx and tx pin of the bluetooth module in other to avoid frying up the chip
If your module makes use of 3.3v for the RS and TX pin, then make use of a voltage divider before powering it up

Usage

Download the project zip
Extract the project and save it in a folder with any name of your choice
Open up the *.ino file with arduino ide
Download the updated android application or IOS application
Upload and wire your circuit using the schematics below

Open up the app and give all requested permission
Hit the search button

Pair the bluetooth device module with your device
- default key is 1234 or 0000
Select device name and connect in switch mode

click on the gear icon at the top right corner of the screen and change the parameter sent over bluetooth
- on = 1
- off = 0

pin use

Arduino pin	use
pin 3	custom RX pin
pin 4	custom TX pin
pin 5	turn relay on and off

code guide


#include <SoftwareSerial.h>

Imported a library that helps us create or turn any of the arduino pins into TX and RX pins

Reason

The bluetooth module makes use of RX and TX pin to transfer and receive data from your mobile device to the arduino board, It's a good thing we create a custom RX and TX pin with the help of the library as it is not advisable to make use of arduino default RX and TX pin

SoftwareSerial customSerial(3,4);

Defined a variable called customSerial
3 denotes arduino pin 3 as your custom RX pin
4 denotes aruino pin 4 as your custom TX pin
- For more documentation on the library check Arduino official website

int electricMotor = 5;

Denotes arduino pin (5) used to control relay where machineries are connected to

int receivedData = 0;

Declared a variable to store the data received from the bluetooth module

void setup() {

  pinMode (electricMotor, OUTPUT);
  digitalWrite(electricMotor,LOW);
  Serial.begin(9600);

}

Void setup is where you write programs you want to only run once
Declared my assigned pin for the electric motor as an output pin
Forced my relay / machineries to always be off at start up
Begin serial monitor at the speed baud rate of 9600
- useful for debugging purpose

void loop(){

Programs you want to continue running

 if (customSerial.available()>0){
    receivedData = customSerial.read();
  }

Check if data has been sent to your module
if data has been sent assign it to the variable called received data

  if (receivedData == '0'){
    digitalWrite(electricMotor,LOW);
    Serial.println('machinery turned off');
    receivedData=0; 
  }
  else if (receivedData =='1'){
    digitalWrite(electricMotor,HIGH);
    Serial.println('machinery turned on');
    receivedData = 0;
  }

Validating process

If data received is 0
- Turn off machineries
- print a message on the serial moinitor that device is off
- reassign the received value as 0 for safety reasons
If data received is 1
- Turn on machineries
- print a message on the serial moinitor that device is on
- reassign the received value as 0 for safety reasons

Buy components¹

Arduino nano	HC-05
Amazon	Amazon
Aliexpress	Aliexpress
Ebay	Ebay

Support and bug reporting

Report found bugs here
Contributions, issues, and feature requests are welcome!
Feel free to make PR
Give a ★ if you like this project!

License

GNU V3

None of the aforementioned links are affiliate links ↩

n1lby73/remote-shutdown