distorted image in latest http server demo #21

tzapu · Feb 18, 2016

hello

When using ArduCAM_Mini_OV2640_websocket_server everything works fine

When i attempt to use ArduCAM_Mini_OV2640_Capture i get garbled frames in both video and static capture

sample

could you help? i tried to look for code differences but byte buffers throw me off... init code seems the same

the issue seems to be in the read/transmit part of the sketch, i have tried the read code from the working sketch in the new one that distorts and capture seems to work fine
it also seems slower, si i am sure the code is not what it should be..

void camCapture(ArduCAM myCAM){
  WiFiClient client = server.client();

  size_t len = myCAM.read_fifo_length();
  if (len >= 393216){
    Serial.println("Over size.");
    return;
  }else if (len == 0 ){
    Serial.println("Size is 0.");
    return;
  }

  uint8_t temp, temp_last;
  static int i = 0;
  static uint8_t first_packet = 1;
  byte buf[2048];
  uint32_t length = 0;

  myCAM.CS_LOW();
  myCAM.set_fifo_burst();//Set fifo burst mode
  SPI.transfer(0x00);
  //Read JPEG data from FIFO
  while ( (temp != 0xD9) | (temp_last != 0xFF))
  {
    temp_last = temp;
    temp = SPI.transfer(0x00);

    //Write image data to buffer if not full
    if (i < 2048)
    {
      buf[i++] = temp;
      //yield();
    }
    else
    {
      if (first_packet == 1)
      {
        //sendClientData((char*)buf, 2048, 0x02);
        client.write((char*)buf, 2048);
        first_packet = 0;
      }
      else
      {
        client.write((char*)buf, 2048);
      }
      i = 0;
      buf[i++] = temp;

    }
    //yield();
  }
  //Write the remain bytes in the buffer
  if (i > 0)
  {
    //Serial.println("write last 256 bytes");
    client.write((char*)buf, 2048);
    //delay(10);
    //Serial.println("finish write last 256 bytes");
    i = 0;
    first_packet = 1;
  }
  //yield();
  myCAM.CS_HIGH();

}

tzapu · Feb 18, 2016

the issue seems to be in the read/transmit part of the sketch, i have tried the read code from the working sketch in the new one that distorts and capture seems to work fine
it also seems slower, si i am sure the code is not what it should be..

void camCapture(ArduCAM myCAM){
  WiFiClient client = server.client();

  size_t len = myCAM.read_fifo_length();
  if (len >= 393216){
    Serial.println("Over size.");
    return;
  }else if (len == 0 ){
    Serial.println("Size is 0.");
    return;
  }

  uint8_t temp, temp_last;
  static int i = 0;
  static uint8_t first_packet = 1;
  byte buf[2048];
  uint32_t length = 0;

  myCAM.CS_LOW();
  myCAM.set_fifo_burst();//Set fifo burst mode
  SPI.transfer(0x00);
  //Read JPEG data from FIFO
  while ( (temp != 0xD9) | (temp_last != 0xFF))
  {
    temp_last = temp;
    temp = SPI.transfer(0x00);

    //Write image data to buffer if not full
    if (i < 2048)
    {
      buf[i++] = temp;
      //yield();
    }
    else
    {
      if (first_packet == 1)
      {
        //sendClientData((char*)buf, 2048, 0x02);
        client.write((char*)buf, 2048);
        first_packet = 0;
      }
      else
      {
        client.write((char*)buf, 2048);
      }
      i = 0;
      buf[i++] = temp;

    }
    //yield();
  }
  //Write the remain bytes in the buffer
  if (i > 0)
  {
    //Serial.println("write last 256 bytes");
    client.write((char*)buf, 2048);
    //delay(10);
    //Serial.println("finish write last 256 bytes");
    i = 0;
    first_packet = 1;
  }
  //yield();
  myCAM.CS_HIGH();

}

it seems modifying buffer size from 4096 to 2048 makes it work, but also seems a lot slower in updating (reads half as much)...
is there anything that could be done?

tzapu · Feb 18, 2016

it seems modifying buffer size from 4096 to 2048 makes it work, but also seems a lot slower in updating (reads half as much)...
is there anything that could be done?

Please modify the source code in the ESP8266 library like the following:

[WiFiClient.h]
#define WIFICLIENT_MAX_PACKET_SIZE 4096

[ClientContext.h]
add the line
_pcb->snd_buf = TCP_SND_BUF;
before
size_t room = tcp_sndbuf(_pcb);

[lwipopts.h]
#define TCP_MSS 2048

admin@arducam.com

ArduCAM · Feb 18, 2016

Please modify the source code in the ESP8266 library like the following:

[WiFiClient.h]
#define WIFICLIENT_MAX_PACKET_SIZE 4096

[ClientContext.h]
add the line
_pcb->snd_buf = TCP_SND_BUF;
before
size_t room = tcp_sndbuf(_pcb);

[lwipopts.h]
#define TCP_MSS 2048

admin@arducam.com

thanks for the info.
i won t be able to test for a while as it s more involved and probably will be overwritten on any core update
but with 2048 as buffer size it seems to work fine for me in the mean time
thanks

tzapu · Feb 18, 2016

thanks for the info.
i won t be able to test for a while as it s more involved and probably will be overwritten on any core update
but with 2048 as buffer size it seems to work fine for me in the mean time
thanks

Changing

static const size_t bufferSize = 2048; // 4096

from 4096 to 2048 works for me too -

that PCB on keyboard is my ESP8266 to ArduCAM breakout ..

mozgy · Feb 18, 2016

Changing

static const size_t bufferSize = 2048; // 4096

from 4096 to 2048 works for me too -

that PCB on keyboard is my ESP8266 to ArduCAM breakout ..

Congratulations Mario. Breakout board looks nice.

ArduCAM · Feb 19, 2016

Congratulations Mario. Breakout board looks nice.

nice, love it when you use a product to demo said product is working :D
which leads me to the question, how many arducams do you have ? :P
lovely breakout, looking foerward to see what you come up with

tzapu · Feb 19, 2016

nice, love it when you use a product to demo said product is working :D
which leads me to the question, how many arducams do you have ? :P
lovely breakout, looking foerward to see what you come up with

We now have two models of ArduCAM mini, 2mp and 5mp. We will design another 3MP soon.

ArduCAM · Feb 19, 2016

We now have two models of ArduCAM mini, 2mp and 5mp. We will design another 3MP soon.

hi, i meant @mozgy :P he took a pic of an arducam with another arducam 📷
but it s nice to know another 3mp is coming, thanks

tzapu · Feb 19, 2016

hi, i meant @mozgy :P he took a pic of an arducam with another arducam 📷
but it s nice to know another 3mp is coming, thanks

As oshpark produces trices I bought two 2MP cams, here's PCB https://oshpark.com/shared_projects/pINKH5In.

mozgy · Feb 19, 2016

As oshpark produces trices I bought two 2MP cams, here's PCB https://oshpark.com/shared_projects/pINKH5In.

ArduCAM_Mini_OV2640_Capture_uploadToServer.txt

Hello Lee,
thanks for sending Arducam through Ebay.
I see you have sold more than 300 pieces so there is some growing community.
Started to try it out.

Arducam mini board draws nearly 100 mA. For a battery powered
security camera I use PIR detector + FET switching on 3.3V.

Downloaded the library from github on 05. March 2016.
Took some time to figure out that the library should be placed in directory arduino/libraries/ArduCAM.
If the arduino-master directory is placed under the libraries folder, the compiler
can not find *.h files.

First tried an example with Arduino streaming to Windows PC:
"ArduCAM_Mini_OV2640_Video_Streaming".

First issue was that there is no circuit diagram on the webpage. I wanted to use with Arduino nano. It took a while to figure that SDA=A4 and SCL=A5.

Second issues Serial.begin(921600); did not work with Arduino Serial Monitor window.
Changed speed to 115200

Third issue was that Arducam.exe downloaded from the Arducam webpage:
http://www.arducam.com/downloads/demo/arducam_host/ArduCAM_host.zip
did not support speed of 900kbps. Appeared that the program was not the latest version and one should use the program included with the github library example.

Next tried the example with ESP8266 module ESP-12E file: "ArduCAM_Mini_OV2640_Capture"
Serial debugging gave message
Can't find OV2640 module!

if ((vid != 0x26) || (pid != 0x41))
in websocket example camera id number is 0x42. Camera was found after changing to 0x42.

while(1); causes reset after a few seconds, as probably, the ESP8266 had no time to do
other internal things.

In the program, I guess, it should also be nr 16 in the comment line.
// set GPIO15 as the slave select :
const int CS = 16;

I also experienced the problem with images chopped into parts described in this issue with the broken and mixed parts of the image.
Changing of buffer size to 2048 helped, but sometimes still was broken. Changing to 1024 solved.
static const size_t bufferSize = 1024;

There is an easy way to capture a picture without the demonstation html:
http://192.168.1.140/capture

Resolution can be changed with numbers between 0 and 8 in such a way:
http://192.168.1.140/?ql=3

I would like to make a PIR activated alarm camera automatically uploading a picture to a server.
I am a big fan of MobileWebcam:
http://forum.xda-developers.com/showthread.php?t=950933
On a server is a mobilewebcam.php script that receives the picture file and puts it into a
directory with a time tag. My webcams ar at http://asi.lv/alnis
Form Linux picture upload line looks like that:
curl -F userfile=@/tmp/current.jpg asi.lv/alnis/webcammob1/mobilewebcam.php

Php upload is more convenient than FTP upload as the file name can be automatically prepared on the server side. Yesterday using TTL camera example by openhomeautomation I have managed to adapt http POST file on ESP8266. Sketch is attached to this post. (Could not attach ino or zip type).

Sorry about wirting too many things in one post.
Greetings from Latvia, Janis Alnis.

janisalnis · Mar 8, 2016