Hello Everyone,
Im new in arduino programming and im not good in programming as well. I have a project wherein to control the relay via webserver as well as texting the recipient for any event that the arduino is doing. However, i have problem with the buttons and the if condition i created in the page. Buttons are disappearing after clicking it and the if condition is not applying(specifically changing the color of the text). Can anyone help me figure out the problem?
Here's the code:
//For ethernet
#include <SPI.h>
#include <Ethernet.h>
//For relay
#include <Wire.h>
#include <Relay.h>
//For Temp
#include <OneWire.h>
#include <DallasTemperature.h>
//For GSM
#include <SoftwareSerial.h>
#include <EEPROM.h>
//For GSM---------------------------------------------------------------------------------
SoftwareSerial mySerial(2, 3);
char Rx_data[150];
unsigned char Rx_index = 0;
int i = 0;
char msg[160];
int sig;
#define DEBUG true
//-----------------------------------------------------------------------------------------
int passFlag = 0;
int passFlag1 = 0;
int passFlag2 = 0;
int passFlag3 = 0;
//Millis timeout---------------------------------------------------------------------------
//-----------------------------------------------------------------------------------------
//Batt pin---------------------------------------------------------------------------------
#define SIGNAL_PIN A0 //battery level monitoring using 4.7K & 2.2K ohm resistor
//-----------------------------------------------------------------------------------------
//Temp Pin---------------------------------------------------------------------------------
#define ONE_WIRE_BUS 4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
float temp;
//-----------------------------------------------------------------------------------------
//Batt computation-------------------------------------------------------------------------
float adc_voltage = 0.0;
float in_voltage = 0.0;
float R1 = 30000.0;
float R2 = 7500.0;
float ref_voltage = 5.0;
int adc_value = 0;
//-----------------------------------------------------------------------------------------
//Ethernet---------------------------------------------------------------------------------
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1, 52);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
//-----------------------------------------------------------------------------------------
// Relay state and pin---------------------------------------------------------------------
String relay1State1 = "ON";
String relay2State2 = "ON";
const int TempCon= 6;
const int ChgRlyCon = 7;
//-----------------------------------------------------------------------------------------
// Client variables------------------------------------------------------------------------
char linebuf[160];
int charcount=0;
boolean authentificated=false;
//-----------------------------------------------------------------------------------------
void dashboardPage(EthernetClient &client) {
client.println(F("HTTP/1.1 200 OK"));
client.println(F("Content-Type: text/html"));
client.println(F("Connnection: close"));
client.println();
client.println(F("<!DOCTYPE HTML><html><style>body {background-image: url(\"https://geloautomationworks.files.wordpress.com/2023/08/bb1.jpg\"); background-size: 100vw 100vh; background-repeat: no-repeat; text-align: center; font-family: \"Trebuchet MS\", Arial;}</style>"));
client.println(F("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"><meta http-equiv=\"refresh\" content=\"1\"></head>"));
client.println(F("<center><a href=\"/\">Refresh</a>"));
client.println(F("<h3>SERVER TEMPERATURE</a></h3>"));
client.println(F("<br>"));
client.println(temp);
client.println(F("</br>"));
// Generates buttons to control the relay
client.println(F("<br>"));
if(relay1State1 == "ON"){
client.println(F("Aircon is <font color=’green’>ON</font>"));
}
else {
client.println(F("Aircon is <font color=’black’>OFF</font>"));
}
client.println(F("</br>"));
client.println(F("<a href=\"/ACON\"><button>ON</button></a>  "));
client.println(F("<a href=\"/ACOFF\"><button>OFF</button></a>"));
client.println(F("<h3>SERVER BATTERY LEVEL</h3>"));
client.println(F("<br>"));
client.println(in_voltage);
client.println(F("</br>"));
// Generates buttons to control the relay
client.println(F("<br>"));
if(relay2State2 == "ON"){
client.println(F("Battery is <font color=’green’>CHARGING</font>"));
}
else {
client.println(F("Battery is <font color='black’>NOT CHARGING</font>"));
}
client.println(F("</br>"));
client.println(F("<a href=\"/DCON\"><button>ON</button></a>  "));
client.println(F("<a href=\"/DCOFF\"><button>OFF</button></a></center>"));
client.println(F("</body></html>"));
}
void SendAuthentificationpage(EthernetClient &client)
{
client.println(F("HTTP/1.1 401 Authorization Required"));
client.println(F("WWW-Authenticate: Basic realm=\"Secure Area\""));
client.println(F("Content-Type: text/html"));
client.println("Connnection: close");
client.println();
client.println(F("<!DOCTYPE HTML>"));
client.println(F("<HTML> <HEAD> <TITLE>Error</TITLE>"));
client.println(F(" </HEAD> <BODY><H1>401 Unauthorized.</H1></BODY> </HTML>"));
}
void setup()
{
// For GSM
Serial.begin(9600);
mySerial.begin(19200);
//---------------------------------------------------------------------------------------
//For ethernet
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
//---------------------------------------------------------------------------------------
//For relay pins
pinMode(ChgRlyCon, OUTPUT);
digitalWrite(ChgRlyCon, HIGH);
pinMode(TempCon, OUTPUT);
digitalWrite(TempCon, HIGH);
//---------------------------------------------------------------------------------------
}
//-------------------------------------------------------------------------------------------
void loop() {
//----GSM------------------------------------------------------------------------------------
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());
// listen for incoming clients
//------------------------------------------------------------------------------------------
//----TEMP SENSOR---------------------------------------------------------------------------
sensors.requestTemperatures(); // Send the command to get temperatures
temp = sensors.getTempCByIndex(0);
sensors.requestTemperatures(); // Send the command to get temperatures
temp = sensors.getTempCByIndex(0);
//------------------------------------------------------------------------------------------
//----BATT SENSOR---------------------------------------------------------------------------
// Why "byIndex"?
// You can have more than one IC on the same bus.
// 0 refers to the first IC on the wire
// Read the Analog Input
adc_value = analogRead(SIGNAL_PIN);
// Determine voltage at ADC input
adc_voltage = (adc_value * ref_voltage) / 1024.0;
// Calculate voltage at divider input
in_voltage = adc_voltage / (R2 / (R1 + R2)) ;
//------------------------------------------------------------------------------------------
//----BASIC AUTHENTICATION------------------------------------------------------------------
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
memset(linebuf, 0, sizeof(linebuf));
charcount = 0;
authentificated = false;
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
linebuf[charcount] = c;
if (charcount < sizeof(linebuf) - 1) charcount++;
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the HTTP request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// decide what to do
if (strstr(linebuf, "Authorization: Basic") > 0 && strstr(linebuf, "YWRtaW46RGF5d2Fsa2VyQDAwMg==") > 0)
authentificated = true;
if (authentificated) {
dashboardPage(client);
if (strstr(linebuf, "GET /ACON") > 0 && authentificated) {
digitalWrite(TempCon, HIGH);
relay1State1="ON";
init_GSM();
send_msg("***********", "AC HAS BEEN TURNED ON BY ADMIN");
}
else if (strstr(linebuf, "GET /ACOFF") > 0 && authentificated) {
digitalWrite(TempCon, LOW);
relay1State1="OFF";
init_GSM();
send_msg("***********", "AC HAS BEEN TURNED OFF BY ADMIN");
}
else if (strstr(linebuf, "GET /DCON") > 0 && authentificated) {
digitalWrite(ChgRlyCon, HIGH);
relay2State2="ON";
init_GSM();
send_msg("***********", "CHARGING THE BATTERY HAS BEEN CONNECTED BY ADMIN");
}
else if (strstr(linebuf, "GET /DCOFF") > 0 && authentificated) {
digitalWrite(ChgRlyCon, LOW);
relay2State2="OFF";
init_GSM();
send_msg("***********", "CHARGING THE BATTERY HAS BEEN DISCONNECTED BY ADMIN");
}
}
else {
SendAuthentificationpage(client);
}
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
//------------------------------------------------------------------------------------------
//----TEMP CONDITION------------------------------------------------------------------------
if( temp >= 35){
digitalWrite(TempCon, HIGH);
relay1State1 = "ON";
if(passFlag == 0){
init_GSM();
send_msg("***********", "AIRCON HAS BEEN TURNED ON");
passFlag = 1;
passFlag1 = 0;
}
}
if (temp <= 14){
digitalWrite(TempCon, LOW);
relay1State1 = "OFF";
if(passFlag1 == 0){
init_GSM();
send_msg("***********", "AIRCON HAS BEEN TURNED OFF");
passFlag1 = 1;
passFlag = 0;
}
//------------------------------------------------------------------------------------------
//----BATT CONDITION------------------------------------------------------------------------
//--------------------------- bms 0, batt lt 13.4v--------------
if(in_voltage >= 15){
digitalWrite(ChgRlyCon, LOW);
relay2State2 = "OFF";
if(passFlag2 == 0){
init_GSM();
send_msg("***********", "CHARGING THE BATTERY HAS BEEN DISCONNECTED");
passFlag2 = 1;
passFlag3 = 0;
}
}
//--------------------------- bms 0, batt is charged at 13.4V -------
if(in_voltage <= 6){
digitalWrite(ChgRlyCon, HIGH);
relay2State2 = "ON";
if(passFlag3 == 0){
init_GSM();
send_msg("***********", "CHARGING THE BATTERY HAS BEEN CONNECTED");
passFlag3 = 1;
passFlag2 = 0;
}
}
}
//------------------------------------------------------------------------------------------
}
//----------------------------------------------------------------------------------------------
//---SEND GSM STRING----
void send_msg(char *number, char *msg)
{
char at_cmgs_cmd[30] = {
'\0' };
char msg1[160] = {
'\0' };
char ctl_z = 0x1A;
sprintf(msg1, "%s%c", msg, ctl_z);
sprintf(at_cmgs_cmd, "AT+CMGS=\"%s\"\r\n",number);
sendGSM(at_cmgs_cmd);
delay(100);
delay(100);
delay(100);
sendGSM(msg1);
delay(100);
}
void sendGSM(char *string){
mySerial.write(string);
delay(90);
}
void clearString(char *strArray) {
int j;
for (j = 100; j > 0; j--)
strArray[j] = 0x00;
}
void send_cmd(char *at_cmd, char clr){
char *stat = '\0';
while(!stat){
sendGSM(at_cmd);
delay(200);
readSerialString(Rx_data);
Serial.write(Rx_data);
stat = strstr(Rx_data, "OK");
Serial.println("Success");
delay(50000);
}
if (clr){
clearString(Rx_data);
delay(200);
stat = '\0';
}
}
void init_GSM(){
sendData("AT\r\n",1000,DEBUG); // AT
sendData("AT+CMGF=1\r\n",1000,DEBUG); //AT+CMGF=1
sendData("AT+CMGD=1\r\n",1000,DEBUG); //AT+CMGD=1
delay(1000);
delay(1000);
delay(1000);
}
void readSerialString (char *strArray) {
if(!mySerial.available()) {
return;
}
while(mySerial.available()) {
strArray[i] = mySerial.read();
i++;
}
}
String sendData(String command, const int timeout, boolean debug)
{
String response = "";
mySerial.print(command);
long int time = millis();
while( (time+timeout) > millis())
{
while(mySerial.available())
{
char c = mySerial.read();
response+=c;
}
}
if(debug)
{
Serial.print(response);
}
return response;
}
Page before clicking the buttons:
Page after clicking the buttons:
Thank you.
