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#include <SPI.h>
#include <Ethernet.h>
#include <WebSocket.h>
#include <SoftwareSerial.h>
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0F, 0x25, 0xC4 };
byte ip[] = { 192, 168, 219, 16 };
WebSocket wsServer;
int DE485 = 2;
SoftwareSerial Soft485(3, 4);
char rx485Ln[8];
int rx485ix;
char bitMap[8];
void AdamReceiver(void);
void hexToBit(char hex, int p);
void setup() {
Serial.begin(9600); // Arduino Sketch Serial Monitor
Soft485.begin(9600);
pinMode(DE485, OUTPUT);
Ethernet.begin(mac, ip);
wsServer.registerConnectCallback(&onConnect);
wsServer.registerDataCallback(&onData);
wsServer.registerDisconnectCallback(&onDisconnect);
wsServer.begin();
delay(100);
rx485ix = -1;
}
void loop() {
wsServer.listen();
AdamReceiver();
}
void onConnect(WebSocket &socket) {
Serial.println("onConnect called");
}
void onDisconnect(WebSocket &socket) {
Serial.println("onDisconnect called");
}
void onData(WebSocket &socket, char* rxLn, byte rxSz) {
// Digital Out
// It is either "DOn=ON" or "DOn=OFF". n = "0" - "7"
// It would really be nice if we can parse "DO", "=ON",
// "=OFF"; however, we are not focusing on this.
// In "DO" we are only checking for "O" and for "=ON" &
// "=OFF", we will only check for "N".
if(rxLn[1] == 'O') {
// RS-485 will be in TX mode when DE is high
digitalWrite(DE485, HIGH);
// We send to ADAM-4050 "#001n01"<cr> if ON or
// "#001n00"<cr> if OFF.
Soft485.write("#001");
Soft485.write(rxLn[2]); // n = "0" - "7"
Soft485.write('0');
if(rxLn[5] == 'N')
Soft485.write('1');
else
Soft485.write('0');
Soft485.write(0x0D);
digitalWrite(DE485, LOW); // When finished, DE must be low
}
// Digital In
// We are only looking for "I" in "DI"
else if(rxLn[1] == 'I') {
digitalWrite(DE485, HIGH);
Soft485.write("$006"); // We send "$AA6"<cr> to ADAM-4050
Soft485.write(0x0D);
digitalWrite(DE485, LOW);
}
}
// ADAM-4050 sends "!ooii00"<cr> as reply.
// The message starts with "!" and ends in <cr>, and there are 6
// bytes in between. The input data are the "ii". For more
// information look at ADAM - Web/Arduino/Adam posting.
void AdamReceiver(void) {
char rxChr;
if(Soft485.available()) {
rxChar = Soft485.read();
if(rxChr == '!')
rx485ix = 0; // message starts with "!"
else if(rx485ix >= 0) {
if(rxChr == 0x0d) { // message ends with <cr>
//!ooii00<cr> Between "!" and <cr> there needs to be
// 6 bytes
if(rx485ix == 6) {
hexToBit(rx485Ln[2], 0);
hexToBit(rx485Ln[3], 4);
wsServer.send(bitMap, 8);
}
rx485ix = -1; // it needs to be sync to "!" again
}
else {
rx485Ln[rx485ix++] = rxChr;
if(rx485ix > 6)
// it cannot be greater than 6 bytes.
// Re-sync to "!".
rx485ix = -1;
}
}
}
}
// We send "bbbbbbbb" to WebSocket. b is equal to each input channel, and it becomes either '0' or '1'.
void hexToBit(char hex, int p) {
int i;
if(hex >= 'A')
hex = hex - 0x41 + 10;
else
hex -= '0';
hex ^= 0x0f;
for(i = 0; i < 4; i++) {
if(hex & 0x08)
bitMap[p + i] = '1';
else
bitMap[p + i] = '0';
hex <<= 1;
}
}
#include <SPI.h> #include <Ethernet.h> #include <WebSocket.h>
/* Mac Address
Each Ethernet Shield has different mac address.
Check your board.
*/
byte mac[] = { 0x90, 0xA2, 0xDA, 0x0F, 0x25, 0xC4 };
/* IP Address
Arduino becomes the server, and it needs fixed IP.
It doesn't necessarily need global IP, it just needs fixed IP.
Most LAN connections use DHCP, so use an Local IP address that
DHCP doesn't use.
HOW?
Open command promp and type ipconfig /all
Check the IP Address for the current PC.
Keeping the same Subnet Mask, try pinging IP addresses.
If you find the IP address that doesn't answer the ping,
use that IP address.
If someone around you gets pissed off because their internet
doesn't work, change the IP address quickly and quietly before
he notices you.
*/
byte ip[] = { 192, 168, 100, 11 };
/*
There are 3 Callbacks in WebSocket.h.
You should be able to guess what they are for just by looking at
there names.
typedef void DataCallback(WebSocket &socket, char* socketString, byte frameLength);
typedef void Callback(WebSocket &socket);
void registerDataCallback(DataCallback *callback);
// Called when received Data
void registerConnectCallback(Callback *callback);
// when WebSocket is connected
void registerDisconnectCallback(Callback *callback);
// when WebSocket is disconnected
*/
WebSocket wsServer;
void onData(WebSocket &socket, char* socketString, byte frameLength) { }
void onConnect(WebSocket &socket) { }
void onDisconnect(WebSocket &socket) { }
void setup() {
Ehternet.begin(mac, ip);
wsServer.registerConnectCallback(&onConnect);
wsServer.registerDataCallback(&onData);
wsServer.registerDisconnectCallback(&onDisconnect);
wsServer.bein();
// Give Ethernet Shield some time to get ready.
delay(100);
}
void loop() {
wsServer.listen();
if(wsServer.isConnected()) {
wsServer.send("abc123", 6);
}
}
/*
listen() needs to be called continuously.
If data is received onData() gets called.
If you want to send data send(char *str, byte length);
*/
#include <SoftwareSerial.h>
SoftwareSerial Soft485(3, 4); int DE485 = 2; /* Pin 3: RX Pin 4: TX Pin 2: DE This was declared in RS485 Shield - Web/Arduino/Adam posting. */
void setup() {
Soft485.begin(9600);
pinMode(DE485, OUTPUT);
}
/*
ADAM-4050 is 9600 bps. (ADAM - Web/Arduino/Adam posting)
*/
.jpg) |
| RS-485 Shield |
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| RS-485 Schematic |
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| Arduino UNO from http://www.nulsom.com/ |
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| Ethernet Shield |
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| Arduino UNO + Ethernet Shield + RS-485 Shield |
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| Arduino UNO + Ethernet Shield + RS-485 Shield, Adam-4050, LED & Switches |
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| ADAM 4050 module w/ 8 LED & 7 DIP Switch |
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| Circuit w/ Switch and LED |