Arduino nano, ENC28J60 Ethernet shield and 4 channel relay

i have already made this project previuosly using arduino uno, wiznet w5100 ethernet shield and 4 channel relay shield. But using Arduino nano + ENC29J60 lot cheaper. not mention it has smaller size. Once you get this badboy online on your network, you can control every device in your house using your smartphone or any gadget you have(that rely on your coding skill, ofcourse).

let’s the fun begin

wait, as usual i don’t do lots of talk so here’s the schematic and arduino code.

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1#include <UIPEthernet.h>
2 
3EthernetServer server = EthernetServer(23);
4boolean alreadyConnected = false; // whether or not the client was connected previously
5String commandString;
6String commandStringTmp;
7 
8int ledPinOne = 3;
9int ledPinTwo = 4;
10int ledPinThree = 5;
11int ledPinFour = 6;
12int val;
13 
14void setup()
15{
16  pinMode(ledPinOne, OUTPUT);      // sets the digital pin 1 as output
17  pinMode(ledPinTwo, OUTPUT);      // sets the digital pin 1 as output
18  pinMode(ledPinThree, OUTPUT);      // sets the digital pin 1 as output
19  pinMode(ledPinFour, OUTPUT);      // sets the digital pin 1 as output
20  digitalWrite(ledPinOne, HIGH);
21  digitalWrite(ledPinTwo, HIGH);
22  digitalWrite(ledPinThree, HIGH);
23  digitalWrite(ledPinFour, HIGH);
24   
25  //Serial.begin(9600);
26 
27  uint8_t mac[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
28  IPAddress myIP(192,168,200,36);
29  IPAddress gateway(192,168,200,18);
30 
31  Ethernet.begin(mac,myIP,gateway);
32 
33  server.begin();
34}
35 
36void loop() {
37  // wait for a new client:
38  EthernetClient client = server.available();
39 
40  // when the client sends the first byte, say hello:
41  if (client) {
42    if (!alreadyConnected) {
43      // clear out the input buffer:
44      client.flush();    
45      commandString = ""; //clear the commandString variable
46 
47      //server.println("--> Please type your command and hit Return...");
48      alreadyConnected = true;
49    } 
50 
51    while (client.available()) {      
52      // read the bytes incoming from the client:
53      char newChar = client.read();
54 
55     if (newChar == 0x0D)  //If a 0x0D is received, a Carriage Return, then evaluate the command
56     {
57         //server.print("Received this command: ");
58         //server.println(commandString);
59         //if (commandString.indexOf("quit") > -1){
60         commandStringTmp = commandString;
61         commandStringTmp.replace("\n","");
62         commandStringTmp.replace("\r","");
63         if (commandStringTmp.equals("quit")) {
64           server.println();
65           server.print("disconnecting\r\n");
66           client.stop();
67         } else {   
68           processCommand(commandString);
69         }
70     } else
71     {
72         //Serial.println(newChar);
73         commandString += newChar;
74     }
75 
76    }
77  }
78}
79 
80void processCommand(String command)
81{
82  command.replace("","");
83  command.replace("\r","");
84  //server.println("Processing command ");
85  //server.println(command);
86  
87// ONE
88  if (command.equals("ledoneon")) {
89    //server.println("LED 1 On command received"); 
90    digitalWrite(ledPinOne, LOW);   // sets the LED one on
91    //server.println("LED 1 was turned on");
92    commandString = "";
93    return;  
94  }
95    
96   
97  if (command.equals("ledoneoff")) {
98    //server.println("LED 1 Off command received"); 
99    digitalWrite(ledPinOne, HIGH);   // sets the LED one off
100    //server.println("LED 1 was turned off");
101    commandString = "";
102    return;
103  } 
104 
105// TWO
106  if (command.equals("ledtwoon")) {
107    //server.println("LED 2 On command received"); 
108    digitalWrite(ledPinTwo, LOW);   // sets the LED one on
109    //server.println("LED 2 was turned on");
110    commandString = "";
111    return;  
112  }
113  
114  if (command.equals("ledtwooff")) {
115    //server.println("LED 2 Off command received"); 
116    digitalWrite(ledPinTwo, HIGH);   // sets the LED one off
117    //server.println("LED 2 was turned off");
118    commandString = "";
119    return;
120  } 
121 
122// THREE
123  if (command.equals("ledthreeon")) {
124    //server.println("LED 3 On command received"); 
125    digitalWrite(ledPinThree, LOW);   // sets the LED one on
126    //server.println("LED 3 was turned on");
127    commandString = "";
128    return;  
129  }
130  
131  if (command.equals("ledthreeoff")) {
132    //server.println("LED 3 Off command received"); 
133    digitalWrite(ledPinThree, HIGH);   // sets the LED one off
134    //server.println("LED 3 was turned off");
135    commandString = "";
136    return;
137  } 
138 
139// FOUR
140  if (command.equals("ledfouron")) {
141    //server.println("LED 4 On command received"); 
142    digitalWrite(ledPinFour, LOW);   // sets the LED one on
143    //server.println("LED 4 was turned on");
144    commandString = "";
145    return;  
146  }
147  
148  if (command.equals("ledfouroff")) {
149    //server.println("LED 4 Off command received"); 
150    digitalWrite(ledPinFour, HIGH);   // sets the LED one off
151    //server.println("LED 4 was turned off");
152    commandString = "";
153    return;
154  } 
155 
156// STATUS
157// ONE
158  if (command.equals("ledonestatus")) {
159    //server.println("LED One status command received"); 
160    val = digitalRead(ledPinOne);   // sets the LED two on
161    server.print("LED 1 was turned ");
162    if (val == 0) {
163      server.println("on");
164    } else {
165      server.println("off");
166    }
167    commandString = "";
168    return;
169  } 
170   
171// TWO
172  if (command.equals("ledtwostatus")) {
173    //server.println("LED Two status command received"); 
174    val = digitalRead(ledPinTwo);   // sets the LED two on
175    server.print("LED 2 was turned ");
176    if (val == 0) {
177      server.println("on");
178    } else {
179      server.println("off");
180    }
181    commandString = "";
182    return;
183  }
184 
185// THREE
186  if (command.equals("ledthreestatus")) {
187    //server.println("LED Three status command received"); 
188    val = digitalRead(ledPinThree);   // sets the LED two on
189    server.print("LED 3 was turned ");
190    if (val == 0) {
191      server.println("on");
192    } else {
193      server.println("off");
194    }
195    commandString = "";
196    return;
197  } 
198 
199// FOUR
200  if (command.equals("ledfourstatus")) {
201    //server.println("LED Four status command received"); 
202    val = digitalRead(ledPinFour);   // sets the LED two on
203    server.print("LED 4 was turned ");
204    if (val == 0) {
205      server.println("on");
206    } else {
207      server.println("off");
208    }
209    commandString = "";
210    return;
211  } 
212   
213  commandString = "";
214}

you can test it, using telnet command to ip address assigned to ethernet shield.

example

1telnet 192.168.200.36 23
2ledoneon <- enter
3ledoneoff <- enter
4ledonestatus <- enter

commands are:

1To turn relays on and off
2- ledoneon
3turn relay no 1 on
4- ledoneoff
5turn relay no 1 off
6- ledtwoon
7turn relay no 2 on
8- ledtwooff
9turn relay no 2 off
10- ledthreeon
11turn relay no 3 on
12- ledthreeoff
13turn relay no 3 off
14- ledfouron
15turn relay no 4 on
16- ledfouroff
17turn relay no 4 off

To view the state of relays

1- leonestatus
2- ledtwostatus
3- ledthreestatus
4- ledfourstatus

have fun

Arduino nano, ENC28J60 Ethernet shield and 4 channel relay

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