Discussion :

[dim22]

Bonjour,
Mon montage est constitué d'un arduino mega d'un shield carte sd (pin 4) d'un shield ethernet et d'une camera OV528
Le but est d'afficher une page web contenant une image appelée ruche.jpg, une photo pic00.jpg, et la valeur des entrées analogiques A0 A1 A2
Dans ce montage la caméra prend une photo efface la précédente et l'enregistre sous le même nom. Ainsi en rafraichissant la page toutes les 60 secondes on peut voir l'évolution de la scène
capter par la caméra. La carte sd abrite la page htm et les images.
j'ai bricolé deux codes: un sur la carte sd et un sur l'arduino (mega car besoin de memoire)
le problème est que sur les premières connexions je n'arrive à avoir que le dessin ruche (quelquefois l'état des capteurs) et une fois j'ai eu la photo prise par la caméra et au bout de quelques minutes la page plante.
Si quelqu'un a une idée je suis preneur.

ps je joins les codes en pièces jointes

Code :

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#include <SPI.h>
#include <arduino.h>
#include <Ethernet2.h>
#include <SD.h>
 
#define PIC_PKT_LEN    128                  //data length of each read, dont set this too big because ram is limited
#define PIC_FMT_VGA    7
#define PIC_FMT_CIF    5
#define PIC_FMT_OCIF   3
#define CAM_ADDR       0
#define CAM_SERIAL     Serial
#define PIC_FMT        PIC_FMT_VGA
#define REQ_BUF_SZ   20
 
 
File myFile;
 int n = 0;
const byte cameraAddr = (CAM_ADDR << 5);  
unsigned long picTotalLen = 0;          
int picNameNum = 0;
 
byte mac[] = {0x90, 0xA2, 0xDA, 0x11, 0x1D, 0x60};
EthernetServer server(80);  // create a server at port 80
File webFile;
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0;              // index into HTTP_req buffer
 
int temperature;
int masse;
int effectif;
 
void setup()
{
    // disable Ethernet chip
    pinMode(53, OUTPUT);
    digitalWrite(53, HIGH);
 
    Serial.begin(115200);       // for debugging
 
    // initialize SD card
    Serial.println("Initializing SD card...");
    if (!SD.begin(4)) {
        Serial.println("ERROR - SD card initialization failed!");
        return;    // init failed
    }
    Serial.println(F("SUCCESS - SD card initialized."));
    // check for index.htm file
    if (!SD.exists("essai.htm")) {
        Serial.println("ERROR - Can't find essai.htm file!");
        return;  // can't find index file
    }
    Serial.println("SUCCESS - Found essai.htm file.");
    initialize();
 
 
    Ethernet.begin(mac);  // initialize Ethernet device
    server.begin();           // start to listen for clients
    Serial.println(Ethernet.localIP()); 
Serial.print(" Default Gateway: ");
Serial.println( Ethernet.gatewayIP());
Serial.print(" Subnet Mask: ");
Serial.println( Ethernet.subnetMask());
Serial.print(" DNS Server: "); 
Serial.println( Ethernet.dnsServerIP());
 
  pinMode(A0,INPUT);
 pinMode(A1,INPUT);
  pinMode(A2,INPUT);  
 
 
}
 
void loop()
{
 
   temperature = analogRead (A0);
masse = analogRead (A1);
effectif = analogRead (A2);
 
                Serial.println("\r\nbegin to take picture");
                delay(200);
                if (n == 0) preCapture();
                Capture();
                GetData();
 
            Serial.print("\r\nTaking pictures success ,number : ");
            Serial.println(n);
 
            n=n+1;
            delay(50);
 
 
    EthernetClient client = server.available();  // try to get client
    if (client) {  // got client?
        boolean currentLineIsBlank = true;
        while (client.connected()) {
            if (client.available()) {   // client data available to read
                char c = client.read(); // read 1 byte (character) from client
                // buffer first part of HTTP request in HTTP_req array (string)
                // leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
                if (req_index < (REQ_BUF_SZ - 1)) {
                    HTTP_req[req_index] = c;          // save HTTP request character
                    req_index++;
                }
 
                // last line of client request is blank and ends with \n
                // respond to client only after last line received
                if (c == '\n' && currentLineIsBlank) {
                    // open requested web page file
                    if (StrContains(HTTP_req, "GET / ")|| StrContains(HTTP_req, "GET /essai.htm")) {
                        client.println(F("HTTP/1.1 200 OK"));
                        client.println(F("Content-Type: text/html"));
                        client.println(F("Connnection: close"));
                        client.println();
                        webFile = SD.open(F("essai.htm"));       // open web page file
                    }
 
                     if (StrContains(HTTP_req, "ajax_switch")) {
                        GetSwitchState(client);
                            }
 
else if (StrContains(HTTP_req, "GET /ruche.jpg")) {
                        webFile = SD.open("ruche.jpg");
                             if (webFile) {
                            client.println(F("HTTP/1.1 200 OK"));
                            client.println();
                            }
                    }
 
                     if (StrContains(HTTP_req, "GET /PIC00.jpg")) {
                        webFile = SD.open("PIC00.jpg");
                             if (webFile) {
                            client.println(F("HTTP/1.1 200 OK"));
                            client.println();
                            }
                    }
                    if (webFile) {
                        while(webFile.available()) {
                            client.write(webFile.read()); // send web page to client
                             }
                        webFile.close();
                    }
                    // reset buffer index and all buffer elements to 0
                    req_index = 0;
                    StrClear(HTTP_req, REQ_BUF_SZ);
                    break;
                }
                // every line of text received from the client ends with \r\n
                if (c == '\n') {
                    // last character on line of received text
                    // starting new line with next character read
                    currentLineIsBlank = true;
                } 
                else if (c != '\r') {
                    // a text character was received from client
                    currentLineIsBlank = false;
                }
            } // end if (client.available())
        } // end while (client.connected())
        delay(1);      // give the web browser time to receive the data
        client.stop(); // close the connection
    } // end if (client)
 
      delay(10000);
}
 
 
void GetSwitchState(EthernetClient c1)
{
   c1.print("temperature: ");
   c1.println(temperature);
   c1.print("masse: ");
     c1.println(masse);
   c1.print("effectif: ");
     c1.println(effectif);
}
 
 
 
 
 
 
// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
    for (int i = 0; i < length; i++) {
        str[i] = 0;
    }
}
 
// searches for the string sfind in the string str
// returns 1 if string found
// returns 0 if string not found
char StrContains(char *str, char *sfind)
{
    char found = 0;
    char index = 0;
    char len;
 
    len = strlen(str);
 
    if (strlen(sfind) > len) {
        return 0;
    }
    while (index < len) {
        if (str[index] == sfind[found]) {
            found++;
            if (strlen(sfind) == found) {
                return 1;
            }
        }
        else {
            found = 0;
        }
        index++;
    }
 
    return 0;
}
 
 
void clearRxBuf()
{
    while (Serial.available())
    {
        Serial.read();
    }
}
/*********************************************************************/
void sendCmd(char cmd[], int cmd_len)
{
    for (char i = 0; i < cmd_len; i++) Serial.print(cmd[i]);
}
/*********************************************************************/
void initialize()
{
    char cmd[] = {0xaa,0x0d|cameraAddr,0x00,0x00,0x00,0x00} ;
    unsigned char resp[6];
 
    Serial.setTimeout(500);
    while (1)
    {
        //clearRxBuf();
        sendCmd(cmd,6);
        if (Serial.readBytes((char *)resp, 6) != 6)
        {
            continue;
        }
        if (resp[0] == 0xaa && resp[1] == (0x0e | cameraAddr) && resp[2] == 0x0d && resp[4] == 0 && resp[5] == 0)
        {
            if (Serial.readBytes((char *)resp, 6) != 6) continue;
            if (resp[0] == 0xaa && resp[1] == (0x0d | cameraAddr) && resp[2] == 0 && resp[3] == 0 && resp[4] == 0 && resp[5] == 0) break;
        }
    }
    cmd[1] = 0x0e | cameraAddr;
    cmd[2] = 0x0d;
    sendCmd(cmd, 6);
    Serial.println("\nCamera initialization done.");
}
/*********************************************************************/
void preCapture()
{
    char cmd[] = { 0xaa, 0x01 | cameraAddr, 0x00, 0x07, 0x00, PIC_FMT };
    unsigned char resp[6];
 
    Serial.setTimeout(100);
    while (1)
    {
        clearRxBuf();
        sendCmd(cmd, 6);
        if (Serial.readBytes((char *)resp, 6) != 6) continue;
        if (resp[0] == 0xaa && resp[1] == (0x0e | cameraAddr) && resp[2] == 0x01 && resp[4] == 0 && resp[5] == 0) break;
    }
}
void Capture()
{
    char cmd[] = { 0xaa, 0x06 | cameraAddr, 0x08, PIC_PKT_LEN & 0xff, (PIC_PKT_LEN>>8) & 0xff ,0};
    unsigned char resp[6];
 
    Serial.setTimeout(100);
    while (1)
    {
        clearRxBuf();
        sendCmd(cmd, 6);
        if (Serial.readBytes((char *)resp, 6) != 6) continue;
        if (resp[0] == 0xaa && resp[1] == (0x0e | cameraAddr) && resp[2] == 0x06 && resp[4] == 0 && resp[5] == 0) break;
    }
    cmd[1] = 0x05 | cameraAddr;
    cmd[2] = 0;
    cmd[3] = 0;
    cmd[4] = 0;
    cmd[5] = 0;
    while (1)
    {
        clearRxBuf();
        sendCmd(cmd, 6);
        if (Serial.readBytes((char *)resp, 6) != 6) continue;
        if (resp[0] == 0xaa && resp[1] == (0x0e | cameraAddr) && resp[2] == 0x05 && resp[4] == 0 && resp[5] == 0) break;
    }
    cmd[1] = 0x04 | cameraAddr;
    cmd[2] = 0x1;
    while (1)
    {
        clearRxBuf();
        sendCmd(cmd, 6);
        if (Serial.readBytes((char *)resp, 6) != 6) continue;
        if (resp[0] == 0xaa && resp[1] == (0x0e | cameraAddr) && resp[2] == 0x04 && resp[4] == 0 && resp[5] == 0)
        {
            Serial.setTimeout(1000);
            if (Serial.readBytes((char *)resp, 6) != 6)
            {
                continue;
            }
            if (resp[0] == 0xaa && resp[1] == (0x0a | cameraAddr) && resp[2] == 0x01)
            {
                picTotalLen = (resp[3]) | (resp[4] << 8) | (resp[5] << 16);
                Serial.print("picTotalLen:");
                Serial.println(picTotalLen);
                break;
            }
        }
    }
 
}
/*********************************************************************/
void GetData()
{
    unsigned int pktCnt = (picTotalLen) / (PIC_PKT_LEN - 6);
    if ((picTotalLen % (PIC_PKT_LEN-6)) != 0) pktCnt += 1;
 
    char cmd[] = { 0xaa, 0x0e | cameraAddr, 0x00, 0x00, 0x00, 0x00 };
    unsigned char pkt[PIC_PKT_LEN];
 
    char picName[] = "pic00.jpg";
 
 
    if (SD.exists(picName))
    {
        SD.remove(picName);
    }
 
    myFile = SD.open(picName, FILE_WRITE);
    if(!myFile){
        Serial.println("myFile open fail...");
    }
    else{
        Serial.setTimeout(1000);
        for (unsigned int i = 0; i < pktCnt; i++)
        {
            cmd[4] = i & 0xff;
            cmd[5] = (i >> 8) & 0xff;
 
            int retry_cnt = 0;
            retry:
            delay(10);
            clearRxBuf();
            sendCmd(cmd, 6);
            uint16_t cnt = Serial.readBytes((char *)pkt, PIC_PKT_LEN);
 
            unsigned char sum = 0;
            for (int y = 0; y < cnt - 2; y++)
            {
                sum += pkt[y];
            }
            if (sum != pkt[cnt-2])
            {
                if (++retry_cnt < 100) goto retry;
                else break;
            }
 
            myFile.write((const uint8_t *)&pkt[4], cnt-6);
            //if (cnt != PIC_PKT_LEN) break;
        }
        cmd[4] = 0xf0;
        cmd[5] = 0xf0;
        sendCmd(cmd, 6);
    }
    myFile.close();
    picNameNum ++;
}

Code html :

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<!DOCTYPE html>
<html>
<head>
<META HTTP-EQUIV=Refresh CONTENT=60>
<title>Arduino Web Page</title>
</META>
<script>
        function GetSwitchState()
        {
            nocache = "&nocache=" + Math.random() * 1000000;
            var request = new XMLHttpRequest();
            request.onreadystatechange = function()
            {
                if (this.readyState == 4) {
                    if (this.status == 200) {
                        if (this.responseText != null) {
                            document.getElementById("switch_txt").innerHTML = this.responseText;
                        }
                    }
                }
            }
            request.open("GET", "ajax_switch" + nocache, true);
            request.send(null);
            setTimeout('GetSwitchState()', 1000);
        }
    </script>
</head>
<body onload="GetSwitchState()">
 
<span style=font-family: Courier New,Courier,monospace;></span>
<table style=text-align: left; width: 1251px; height: 119px; border=1cellpadding=2 cellspacing=2>
<tbody>
<tr>
 
<td style=width: 40%; colspan=1 rowspan=3><img src="PIC00.jpg" /></td>
<td id="switch_txt">Switch state: Not requested...</td>
</tr>
 
 <tr>
<td style=width: 30%; colspan=1 rowspan=3><img src="ruche.jpg" /></td>
 </tr>
 </tbody>
</table>
<br>