FT245 RELAY CONTROLLER
Visit http://researchdesignlab.com/usb-4-channel-relay-board.html to buy 4-channel relay and visit http://researchdesignlab.com/usb-8-channel-relay-board.htmlto buy 8-channel relay.
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
Here we are making use of 4 channel relay to controlling
it, The following picture show the design part of it, in this we have used one combo
box for reading com port and open button to open the selected port, and DATA
text box, this is for entering manually which relay should turn on suppose if
you enter ‘ff’ it will turn on relay1.
The complete source code for controlling 4/8 channel
relay.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ft245rlAPP
{
publicpartialclassForm1 : Form
{
CommManager comMangr=newCommManager();
public Form1()
{
InitializeComponent();
}
privatevoid Form1_Load(object sender, EventArgs e)
{
try {
comMangr.SetPortNameValues(comPortCmb);
comMangr.BaudRate
= "9600";
comMangr.DataBits
= "8";
comMangr.Parity
= "None";
//comMangr.DisplayWindow =
terminalRichTextBox1
comPortCmb.SelectedIndex
= 0;
comMangr.PortName
= comPortCmb.Items[comPortCmb.SelectedIndex].ToString();
comMangr.StopBits
= "One";
//comMangr.SignalStrengthBar =
SigStrProgressBar1
privatevoid Button2_Click(object sender, EventArgs e)
// comMangr.SignalStrengthLbl = signaStrDb
comMangr.CurrentTransmissionType
= CommManager.TransmissionType.Hex;
System.Diagnostics.Process.Start("C:\\\\ft245RL_Init.exe");
System.Threading.Thread.Sleep(5000);
} catch (Exception ex) {
MessageBox.Show(ex.Message);
}
Button2.Enabled
= false;
Button3.Enabled
= false;
Button4.Enabled
= false;
Button5.Enabled
= false;
Button6.Enabled
= false;
Button7.Enabled
= false;
Button8.Enabled
= false;
Button9.Enabled
= false;
Button10.Enabled
= false;
}
privatevoid Button1_Click(System.Object sender, System.EventArgs e)
{
comMangr.OpenPort();
Button2.Enabled
= true;
Button3.Enabled
= true;
Button4.Enabled
= true;
Button5.Enabled
= true;
Button6.Enabled
= true;
Button7.Enabled
= true;
Button8.Enabled
= true;
Button9.Enabled
= true;
Button10.Enabled
= true;
}
privatevoid Button1_Click_1(object sender, EventArgs e)
{
comMangr.OpenPort();
Button2.Enabled
= true;
Button3.Enabled
= true;
Button4.Enabled
= true;
Button5.Enabled
= true;
Button6.Enabled
= true;
Button7.Enabled
= true;
Button8.Enabled
= true;
Button9.Enabled
= true;
Button10.Enabled
= true;
}
{
comMangr.WriteData(TextBox1.Text);
}
privatevoid Button3_Click(object sender, EventArgs e)
{
comMangr.WriteData("02");
}
privatevoid Button4_Click(object sender, EventArgs e)
{
comMangr.WriteData("00");
}
privatevoid Button6_Click(object sender, EventArgs e)
{
comMangr.WriteData("08");
}
privatevoid Button5_Click(object sender, EventArgs e)
{
comMangr.WriteData("00");
}
privatevoid Button10_Click(object sender, EventArgs e)
{
comMangr.WriteData("20");
}
privatevoid Button9_Click(object sender, EventArgs e)
{
comMangr.WriteData("00");
}
privatevoid Button8_Click(object sender, EventArgs e)
{
comMangr.WriteData("80");
}
privatevoid Button7_Click(object sender, EventArgs e)
{
comMangr.WriteData("00");
}
}
}
And create same commanger class as we discussed in RFID
DATA READ FROM SERIAL PORT SECTION.
GSM INTERFACE
Visit http://researchdesignlab.com/gsm-sim-900.html to buy this product.
There
are many different kinds of applications SMS applications in the market today,
and many others are being developed. Applications in which SMS messaging can be
utilized are virtually unlimited. Some common examples of these are given
below:
- Person-to-person text messaging is the most commonly used SMS application, and it is what the SMS technology was originally designed for.
- Many content providers make use of SMS text messages to send information such as news, weather report, and financial data to their subscribers.
- SMS messages can carry binary data, and so SMS can be used as the transport medium of wireless downloads. Objects such as ringtones, wallpapers, pictures, and operator logos can be encoded in SMS messages.
- SMS is a very suitable technology for delivering alerts and notifications of important events.
- SMS messaging can be used as a marketing tool.
In
general, there are two ways to send SMS messages from a computer / PC to a
mobile phone:
- Connect a mobile phone or GSM/GPRS modem to a computer / PC. Then use the computer / PC and AT commands to instruct the mobile phone or GSM/GPRS modem to send SMS messages.
- Connect the computer / PC to the SMS center (SMSC) or SMS gateway of a wireless carrier or SMS service provider. Then send SMS messages using a protocol / interface supported by the SMSC or SMS gateway
AT Commands
AT commands are instructions used to control a modem.
AT is the abbreviation of ATtention. Every command line starts with
"AT" or "at". That's why modem commands are called AT
commands. There are two types of AT commands:
- Basic commands are AT commands that do not start with a "+". For example, D (Dial), A (Answer), H (Hook control), and O (Return to online data state) are the basic commands.
- Extended commands are AT commands that start with a "+". All GSM AT commands are extended commands. For example, +CMGS (Send SMS message), +CMGL (List SMS messages), and +CMGR (Read SMS messages) are extended commands
The FORM DESIGN as show below, Here we
using combo box for port selection and
textbox for entering mobile number to send sms,and message field to type
message and send button.
The complete code as given below, Here we have to
create two class 1)sms , 2)program.
The class sms will set all pre-requirements in order
to send sms,and port values and program class will load the forms and this will
initiate the application.
Form1.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
namespace SendSMS
{
publicpartialclassForm1 : Form
{
public Form1()
{
InitializeComponent();
loadPorts();
}
privatevoid btnSend_Click(object sender, EventArgs e)
{
SMS sm = newSMS(cboPorts.Text);
sm.Opens();
sm.sendSMS(txtPhone.Text, txtMessage.Text);
sm.Closes();
MessageBox.Show("Message Sent!");
}
privatevoid loadPorts()
{
string[] ports = SerialPort.GetPortNames();
foreach (string port in ports)
{
cboPorts.Items.Add(port);
}
}
}
}
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace SendSMS
{
staticclassProgram
{
///<summary>
/// The main entry point for the application.
///</summary>
[STAThread]
staticvoid Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(newForm1());
}
}
}
Sms.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.IO.Ports;
using System.Windows.Forms;
namespace SendSMS
{
classSMS
{
SerialPort serialPort;
public SMS(string comPort)
{
this.serialPort = newSerialPort();
this.serialPort.PortName = comPort;
this.serialPort.BaudRate = 9600;
this.serialPort.Parity = Parity.None;
this.serialPort.DataBits = 8;
this.serialPort.StopBits = StopBits.One;
this.serialPort.Handshake = Handshake.RequestToSend;
this.serialPort.DtrEnable = true;
this.serialPort.RtsEnable = true;
this.serialPort.NewLine = System.Environment.NewLine;
}
publicbool sendSMS(string cellNo, string sms)
{
string messages = null;
messages = sms;
if (this.serialPort.IsOpen == true)
{
try
{
this.serialPort.WriteLine("AT" + (char)(13));
Thread.Sleep(4);
this.serialPort.WriteLine("AT+CMGF=1" + (char)(13));
Thread.Sleep(5);
this.serialPort.WriteLine("AT+CMGS=\"" + cellNo + "\"");
Thread.Sleep(10);
this.serialPort.WriteLine(">" +
messages + (char)(26));
}
catch (Exception ex)
{
MessageBox.Show(ex.Source);
}
returntrue;
}
else
returnfalse;
}
publicvoid Opens()
{
if (this.serialPort.IsOpen == false)
{
this.serialPort.Open();
}
}
publicvoid Closes()
{
if (this.serialPort.IsOpen == true)
{
this.serialPort.Close();
}
}
}
}
