Hello guys
I need your Guide before your help. as i get confused after many searches on google.
first of all, i have Arduino Uno with eathernet shield , and i connected it to SCADA system using OPC server, as below code, and its working fine with no problems. and i tried to update my project, and remove the Ethernet shield and use WIFI ESP8266 instead of Ethernet. i couldnt use it as i think i have to use the WIFI Shield. could you help me in my code how to communicate with the OPC server using ESP8266?
The below code is from OPC example for Ethernet shield R3.
i need to use the same code structure to be compatible with ESP8266.
My Project Scope is to control multiple Arduino by SCADA system (Intouch Wonderware) through WIFI .
/*
* A generic sketch for use with the Arduino OPC or Visual OPC Builder from www.st4makers.com
*/
#include <OPC.h>
#include <Bridge.h>
#include <Ethernet.h>
#include <SPI.h>
/*
* Declaring the OPC object
*/
OPCEthernet myArduinoUno;
/*
* MAC address from Ethernet shield sticker under board
*/
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0E, 0xAD, 0x8D };
/*
* Set your network configuration
*/
IPAddress ip(10, 1, 0, 179);
IPAddress gateway(10,1,0,1);
IPAddress dns_server(10,1,0,1);
IPAddress subnet(255,255,255,0);
/*
* Server listen port
*/
const int listen_port = 80;
opcOperation digital_status_input[14], analog_status_input[6];
bool readwrite_digital(const char *itemID, const opcOperation opcOP, const bool value)
{
byte port;
port = atoi(&itemID[1]);
if (opcOP == opc_opwrite) {
if (digital_status_input[port] == opc_opread) {
digital_status_input[port] = opc_opwrite;
pinMode(port,OUTPUT);
}
digitalWrite(port,value);
}
else
{
if (digital_status_input[port] == opc_opwrite) {
digital_status_input[port] = opc_opread;
// pinMode(port,INPUT);
}
return digitalRead(port);
}
}
int readwrite_analog(const char *itemID, const opcOperation opcOP, const int value) {
byte port;
port = atoi(&itemID[1]);
if (opcOP == opc_opwrite) {
if (analog_status_input[port] == opc_opread) {
analog_status_input[port] = opc_opwrite;
pinMode(port,OUTPUT);
}
analogWrite(port,value);
}
else
{
if (analog_status_input[port] == opc_opwrite) {
analog_status_input[port] = opc_opread;
//pinMode(port,INPUT);
}
return analogRead(port);
}
}
void setup() {
byte k;
for (k=0;k<14;k++) digital_status_input[k] = opc_opread;
for (k=0;k<5;k++) analog_status_input[k] = opc_opread;
/*
* OPC Object initialization
*/
myArduinoUno.setup(listen_port,mac,ip);
myArduinoUno.addItem("D0",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D1",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D2",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D3",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D4",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D5",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D5",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D6",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D7",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D8",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D9",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D10",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D11",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D12",opc_readwrite, opc_bool, readwrite_digital);
myArduinoUno.addItem("D13",opc_readwrite, opc_bool, readwrite_digital);
}
void loop() {
myArduinoUno.processOPCCommands();
}
