TheRandomLab: Arduvision (I): embedded computer vision with arduino

Sep 27, 2014

Arduvision (I): embedded computer vision with arduino

Ok, its time to share stuff again.

I've spent most of this year's (2014) summer learning how to use a CMOS sensor together with an arduino (ATmega328p) microcontroller, in the process of developing some personal projects.

This is the first of a series of articles to publish my experiencies, and hopefully save someone's time.

In this first post, I'll just release the minimal info that may let you start right away experimenting without reading about how things work. In further articles I'll make detailed explanations of the hardware and software, and the decisions and reasons that led me to my current setup. However, at the end of this post, you may find links to useful documentation.

My system is based on Linux, Ubuntu 14.04 x64. You may need to adapt things to your system. You are assumed to have some knowledge of the arduino platform and environment, and also the Processing.org development environment. If so, here is what you need to clone my current setup:

WARNING:

DO NOT USE AN ARDUINO THAT

OUTPUTS 5V ON THE DIGITAL PINS.

HARDWARE NEEDED:

- Arduino compatible development board with ATmega 328p, rated at 3.3 volts. I use a clone of a Sparkfun Arduino Pro Mini at 8MHz and 3.3v. This doesn't have USB, so I use a USB to serial adapter that works at 3.3v. There are other boards that should work too (not tested): Arduino Pro (3.3V version), OLIMEXINO-328, Iteaduino Uno, Seeeduino, Freaduino, Youduino, Bouno Lite, etc.

- A CMOS module with FIFO and an ov7670 or an ov7725 sensor (I've tried both, and setup the register parameters). At the moment I'm working only through the FIFO, but may try synchronize the microcontroller clock directly with the CMOS sensor, as int the AVRcam project.
For this setup the module must have the following available pins (numbering may differ):

GND --- 1 2 --- VCC3.3

OV_SCL --- 3 4 --- FIFO_WRST

OV_SDA --- 5 6 --- FIFO_RRST

FIFO_D0 --- 7 8 --- FIFO_OE

FIFO_D2 --- 9 10 --- FIFO_D1

FIFO_D4 --- 11 12 --- FIFO_D3

FIFO_D6 --- 13 14 --- FIFO_D5

FIFO_RCLK --- 15 16 --- FIFO_D7

FIFO_WEN --- 17 18 --- OV_VSYNC

EDIT: some other modules have these pin numbers/labeling:

VCC --- 1 2 --- GND

SIO_C --- 3 4 --- SIO_D

VSYNC --- 5 6 --- HREF

FIFO_D7 --- 7 8 --- FIFO_D4

FIFO_D5 --- 9 10 --- FIFO_D2

FIFO_D3 --- 11 12 --- FIFO_D0

FIFO_D1 --- 13 14 --- FIFO_D6

RESET --- 15 16 --- PWDN

STROBE --- 17 18 --- FIFO_RCK

FIFO_WR --- 19 20 --- FIFO_OE

FIFO_WRST --- 21 22 --- FIFO_RRST

ov7670-fifo-v3:

VCC --- 1 2 --- GND

SIO_C --- 3 4 --- SIO_D

VSYNC --- 5 6 --- HREF

WEN --- 7 8 --- XCLK

FIFO_RRST --- 9 10 --- FIFO_OE

RCLK/WR --- 11 12 --- GND

FIFO_D0 --- 13 14 --- FIFO_D1

FIFO_D2 --- 15 16 --- FIFO_D3

FIFO_D4 --- 17 18 --- FIFO_D5

FIFO_D6 --- 19 20 --- FIFO_D7

I've tested an ELH 30w FIFO module and the Alientek OV7670 v2.2 module. Both use a 12MHz clock. Other modules use a 24MHz clock. While this affects only the framerate selection parameters, some newer versions have a different schematic/pinout which need VSYNC signal to be inverted, these will not work with this setup.

- Female to female jumper wires to connect the Arduino board to the CMOS module.

CONNECTIONS:

Connect the boards as follows:

OV+FIFO ATMEGA 328P 3.3V/8MHz

           GND ------ GND
               3.3V ------ VCC
               FIFO_OE ------ GND
           FIFO_WR/FIFO_WEN ------ D8
          FIFO_RCK/FIFO_RCLK ------ D9
             FIFO_WRST ------ D12
             FIFO_RRST ------ D13
           SIO_D/OV_SDA ------ A4
           SIO_C/OV_SCL ------ A5
              OV_VSYNC ------ D2
             FIFO_D3 ------ D3
             FIFO_D4 ------ D4
               FIFO_D5 ------ D5
               FIFO_D6 ------ D6
           FIFO_D7 ------ D7

(some modules) PWDN ------ GND / not connected
(some modules) RESET ------ VCC / not connected

(some modules) HREF ------ not connected

(some modules) STROBE ------ not connected

You may edit the file IO_config.h of the arduino sketch if you want to make some changes, just pay attention on the VSYNC pin, that is tied to INT0 interruption.

SOFTWARE:

You can download from this repo the arduino sketch and the processing code to communicate with the arduino via USB:

https://github.com/dasaki/arduvision

The code will either stream a 80x60 pixels image, in different pixel depths, or detect the boundaries of the brightest/darkest blob within a threshold.

Edit: you get too much garbage in the processing console you may need to change the baudrate to match your system capabilities.

In the arduino sketch look for the line:
static const unsigned long _BAUDRATE = 500000;

And in the processing sketch, in the globalDefinitions.java tab:
public final static int BAUDRATE = 500000;

Try with substituting the 500000 for 115200.

NOTES ON THE ARDUINO SIDE:

Some people have added pullup resistors to the SDA and SCL lines and disabled the internal pullups. However, as I'm working with a 3.3v version, in this setup things worked straight away without these steps.

NOTES IN THE PROCESSING SIDE:

You will have to change the serial port name to match your system. In the processing code, look for the line:

serialPort = new Serial(this, "/dev/ttyUSB0", G_DEF.BAUDRATE);

And chage the port name "/dev/ttyUSB0".

This is a video of the demo working with an Alientek ov7670 FIFO module and a Funduino UNO (with the voltage selection switch set at 3.3v !!!):

RESOUCES / LINKS:

I'll try that all the information published here is related only to 100% open hardware and software.

Two inspiring fully open hardware and software embedded computer vision projects:

AVRcam by John Orlando

One of the pioneers pushing the little microcontroller capabilities.

OpenMV by Ibrahim Abdelkader

google group: https://groups.google.com/d/forum/openmvcam

Currently in development, it will be an amazing and affordable platform with outstanding capabilities, and the only one in its class completely open.

Useful documentation

Source code related to microcontrollers and CMOS sensors/modules:

Forum discussion threads about microcontrollers and CMOS sensors/modules

117 comments:

Wheberton FialhoOctober 3, 2014 at 5:34 AM
Hello ...
I copied all files and made the connections as pictured ...
and sent the .ino for Arduino ...
how do i see if it is working?
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Wheberton FialhoOctober 6, 2014 at 2:32 PM
can occur even connecting pin 3.3v
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David Sanz KirbisOctober 6, 2014 at 2:50 PM
Yes, pin 3.3v is just the power line, but the logic levels that go to the sensor (SDA, SCL and VSYNC) have to be also 3.3v or lower. A "3.3v arduino" means that the logic levels are 3.3v not 5v.
You can still try to put resistors as explained here: http://nicolasfley.fast-page.org/wp-content/uploads/2013/09/schema_arduino_FIFO_OV7670.png and see if your sensor is still alive.
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UnknownMay 26, 2015 at 5:49 PM
Hello
Have a nice day! :D
My name is Jim
I got a school project, i should take pictures with OV7670 camera using my computer and an arduino pro mini.
When i was connecting the camera on the arduino, i find out that my camera hasnt the following 4 pins: WEN, RCLK, SCL, SDA so cant continue with my project.

here is the camera:

http://i01.i.aliimg.com/wsphoto/v1/1881045091/640x480-VGA-CMOS-Camera-Module-OV7670-font-b-FIFO-b-font-Buffer-font-b-AL422B-b.jpg

Any ideas?
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UnknownMay 26, 2015 at 5:51 PM
Hello
Have a nice day! :D
My name is Jim.

I got a school project, i should take pictures with OV7670 camera using my computer and an arduino pro mini.

When i was connecting the camera on the arduino, i find out that my camera hasnt the following 4 pins: WEN, RCLK, SCL, SDA so cant continue with my project.

here is the camera:

http://i01.i.aliimg.com/wsphoto/v1/1881045091/640x480-VGA-CMOS-Camera-Module-OV7670-font-b-FIFO-b-font-Buffer-font-b-AL422B-b.jpg

What to do now? Any ideas? Thanks
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UnknownJune 9, 2015 at 10:48 AM
Hello David.
Have a nice day.

I followed the instructions, downloaded the arduino sketch and the processing code

then i compile/verify the code and the processing console show message :

Sketch uses 7,818 bytes (25%) of program storage space. Maximum is 30,720 bytes.
Global variables use 804 bytes (39%) of dynamic memory, leaving 1,244 bytes for local variables. Maximum is 2,048 bytes.

compiling done
then i did upload and upload done.

Then i downloaded the Processing environment and followed alla the steps above and thats what the processing console message shows:
"send 20
The buffer passed to readBytesUntil() is to small to contain 11 bytes up to and including char 10
The buffer passed to readBytesUntil() is to small to contain 11 bytes up to and including char 10
thresh 130
The buffer passed to readBytesUntil() is to small to contain 11 bytes up to and including char 10"

I am using this arduino :
http://www.ebay.com/itm/200914924969?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Why it does not show image?

Thank you for your response.
Regards
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JuchenSeptember 23, 2015 at 5:29 AM
This comment has been removed by the author.
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JuchenSeptember 23, 2015 at 5:31 AM
Hi!

I wonder if the code is sensitive to cpu clock speed. I had succesful init using 16mhz arduino and it send something when running the processing scketch but nothing appeared. No image, just a dark screen and text. I kept hitting spacebar but no effect.
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JuchenSeptember 23, 2015 at 11:02 AM
Thanks for fast response! My arduino runs 3.3v so that isn't problem. I have never had any problem with running 16mhz 3.3v and actually have never seen anybody to report problems so I use this setup all the time when prototyping.

I tried lowering baudrate from 112500 to 57600 etc. and got something but not proper pictures. Screen was dark but when i aimed window i camera showed bright area. However after about a minute i started to have very messy and noisy picture that didn't react to camera moves. I had this also this "buffer passed to ..." error mentioned in earlier posts. I would be so grateful to get some advice...

Do you happen to have any simplier codes that just get an image and send it to processing?
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JuchenSeptember 23, 2015 at 12:46 PM
I think there is still something wrong with code (processing or arduino?) because there is never pictures like in your video. If it were about bad contacts i think there wouldn't be the exactly same behaviour every time? No I have tested it with every possible baudrate many times and every time picture freezes to messy nonsense after running short time and never recovers. Before this camera detects only bright light but gives no real pictures. Do you think that error message isn't a probelm?

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JuchenSeptember 24, 2015 at 9:59 AM
Thank you very much for your help! Your code solved the processing problem and now it streams pictures with any baudrate without freezing and giving error messages.

However the pictures don't make any sense. Theyd are kind of fractal-like blobs changing their size a bit all the time even when camera isn't moving. Pattern are kind of images because they react going darker when i shade the camera lense.

I have to investigate further whats wrong with my setting. I think it could about reading the FIFO because camera seems to work.
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JuchenSeptember 24, 2015 at 12:27 PM
Problem solved. After checking out connections many times and comparing schematics and my module with multimeter i couldn't find anything wrong. It came to my mind if the optics are bad. I found that holder of lense was misaligned and bad. I replaced it with lense and holder from my non-fifo module and everything is ok now :) Too much work because of one faulty crappy ebay module...

Thank you very much for the support and code fix!
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drakaSeptember 26, 2015 at 3:13 PM
Hello David.

can you help me !!!! my name's draka.

I can't not show up the picture.

here is the camera :

http://bestcamcorder.trafficmanager.net/pet-camera/cf7670-v3-belt-fifo-ov7670-webcam-mcu-alx-1199157928-dp.html

and i use this arduino :

https://www.arduino.cc/en/Main/ArduinoBoardUno

thanks.
ReplyDelete
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drakaSeptember 26, 2015 at 3:13 PM
Hello David.

can you help me !!!! my name's draka.

I can't not show up the picture.

here is the camera :

http://bestcamcorder.trafficmanager.net/pet-camera/cf7670-v3-belt-fifo-ov7670-webcam-mcu-alx-1199157928-dp.html

and i use this arduino :

https://www.arduino.cc/en/Main/ArduinoBoardUno

thanks.
ReplyDelete
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drakaSeptember 26, 2015 at 3:17 PM
Hello David.

can you help me !!!! my name's draka.

I can't not show up the picture.

here is the camera :

http://bestcamcorder.trafficmanager.net/pet-camera/cf7670-v3-belt-fifo-ov7670-webcam-mcu-alx-1199157928-dp.html

and i use this arduino :

https://www.arduino.cc/en/Main/ArduinoBoardUno

thanks.
ReplyDelete
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David Sanz KirbisOctober 21, 2015 at 8:40 AM
This comment has been removed by the author.
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opcwalOctober 27, 2015 at 1:52 PM
Hey David, I'm using a DCCduino Nano which I believe is 3.3V.
I've changed the baud rate to 115200 for both the Processing and Arduino code.

I've gotten:
Initializing sensor...
inited OK, sensor PID: 7673

Here's the album of the garbage stream I get with various stream speeds:
http://imgur.com/a/6oAvY

Please help! Thank you!
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opcwalOctober 27, 2015 at 1:54 PM
Hi David,
I'm using a GCCduino Nano which I believe is 3.3V. I set the baud rate for both the Processing and Arduino code to 115200.

I get:
Initializing sensor...
inited OK, sensor PID: 7673

But no images. Here's the garbage output I get with different stream speeds:
http://imgur.com/a/6oAvY
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UnknownOctober 28, 2015 at 5:45 PM
Would you be able to use a bluetooth module as opposed to a usb cable to view this? I'm trying to build a small short distance wireless module with my pro mini.
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opcwalOctober 30, 2015 at 3:10 PM
The nicolasfley site is down, and I'm not sure what the schematic for pulling down 5V to 3V3 is. Is it for SIOC and SIOD only? Do I also need VSYNC?

What values of resistors are needed - 10k from SIOC to 3V3?
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opcwalNovember 2, 2015 at 8:58 AM
It would be nice to have a level shifter - I'll order that next. I only have resistors on hand so I'm using 4.7k and 10k resistors to create a voltage divider (10k from SIOC/SIOD camera pins to the Arduino, and 4.7K from the camera pins to GND). This should divide the voltage enough for high/low voltage of the digital pins to be recognized. However, the camera refuses to initialize:
Initializing sensor...

Then it never says anything else.

I've ordered a 3.3V Arduino clone that should come in soon, so these problems hopefully will be gone.

Also, I didn't quite understand your other comment - "if you read the sensor's pixel data lines directly with the Arduino pins you risk sending 5v by mistake." I'm not sure what you mean by that. My camera D0-D7 pins are connected to the Arduino, but since they Arduino pins are configured as inputs, it shouldn't make a difference right?
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opcwalNovember 2, 2015 at 12:18 PM
This is really frustrating. I must be doing something else wrong. Since I don't care about reading registers from the camera anyway, and just need to set them at the beginning, I think a voltage divider could work fine. I've tried 10k as well as 4.7k which I found on the Arduino site: http://playground.arduino.cc/Main/I2CBi-directionalLevelShifter

However, I still get jumbled garbage from the camera output. I must have messed up code or something. I have low baud rate, great wiring (helped by my electrical engineering friend), I tried a new camera after adding the voltage dividers to make sure my camera didn't burn out, I get "inited OK, sensor PID"... but I only get garbage output.

http://imgur.com/o8wefM8

Sometimes it looks like the output gets "whiter" when I point toward a light source, or all dark/green when I put it in the dark, or red when I point the camera to my red shirt. But it's always interspersed with the garbage green lines, and out of order.
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opcwalNovember 5, 2015 at 1:47 PM
Hey David! :D I have a positive update!
Instead of green garbled garbage, I have something now: http://imgur.com/a/tVmLe
But it only picks up light/dark and shows blobs, and has a green tinge. I'm not in a dark room.
It was my fault; I did not follow the wiring connections because I wanted to add all the data pins. I connected WE to an analog pin and changed the pin settings in the code. Now that I have changed them back and only plugging in the 5 data pins that your example uses, the camera is able to give me a blob.
I've made the sensor ID model edit in sensor.cpp, and on 115200 baud.

Now I am trying to figure out how to get actual camera feed, not just light blobs.
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UnknownDecember 16, 2015 at 11:53 AM
Hello all,
I am trying to capture image vidio from ov7670 (http://dx.com/p/ov7670-300kp-vga-camera-module-for-arduino-147742) using arduino mega.
Please help me in my task.
Thanks in advance!!!!
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asciiDecember 26, 2015 at 5:56 AM
Thank you very much for your work. It worked for me the first time.
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UnknownFebruary 15, 2016 at 9:40 PM
why have this problem
Arduino: 1.6.7 (Windows 8.1), Board: "Arduino/Genuino Uno"

C:\Users\user\Documents\Arduino\ov_fifo_test\ov_fifo_test.ino:92:7: warning: extra tokens at end of #else directive [enabled by default]

#else ifdef QQQVGA

^

ov_fifo_test:162: error: ISO C++ forbids declaration of 'vsyncIntFunc' with no type [-fpermissive]

void static __inline__ vsyncIntFunc() {

^

C:\Users\user\Documents\Arduino\ov_fifo_test\ov_fifo_test.ino: In function 'void setup()':

ov_fifo_test:147: error: invalid conversion from 'int (*)()' to 'void (*)()' [-fpermissive]

attachInterrupt(VSYNC_INT, &vsyncIntFunc, FALLING);

^

In file included from sketch\ov_fifo_test.ino.cpp:1:0:

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:142:6: error: initializing argument 2 of 'void attachInterrupt(uint8_t, void (*)(), int)' [-fpermissive]

void attachInterrupt(uint8_t, void (*)(void), int mode);

^

C:\Users\user\Documents\Arduino\ov_fifo_test\ov_fifo_test.ino: In function 'void vsyncIntFunc()':

ov_fifo_test:162: error: new declaration 'void vsyncIntFunc()'

void static __inline__ vsyncIntFunc() {

^

ov_fifo_test:162: error: ambiguates old declaration 'int vsyncIntFunc()'

void static __inline__ vsyncIntFunc() {

^

ov_fifo_test:170: error: invalid conversion from 'int (*)()' to 'void (*)()' [-fpermissive]

attachInterrupt(VSYNC_INT, &vsyncIntFunc, FALLING);

^

In file included from sketch\ov_fifo_test.ino.cpp:1:0:

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:142:6: error: initializing argument 2 of 'void attachInterrupt(uint8_t, void (*)(), int)' [-fpermissive]

void attachInterrupt(uint8_t, void (*)(void), int mode);

^

C:\Users\user\Documents\Arduino\ov_fifo_test\ov_fifo_test.ino: At global scope:

C:\Users\user\Documents\Arduino\ov_fifo_test\ov_fifo_test.ino:162:19: warning: inline function 'int vsyncIntFunc()' used but never defined [enabled by default]

void static __inline__ vsyncIntFunc() {

^

exit status 1
ISO C++ forbids declaration of 'vsyncIntFunc' with no type [-fpermissive]

This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
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UnknownFebruary 26, 2016 at 2:23 AM
This comment has been removed by the author.
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UnknownFebruary 29, 2016 at 4:05 AM
WHY DO NOT USE D2,D1,D0 PORT ???

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UnknownMarch 3, 2016 at 2:38 AM
thank you !
DO you have Color Tracking code??
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UnknownMarch 10, 2016 at 2:00 AM
what meaning for this code ? can you Explanation for me ?
thank you ! David!
void drawTracking() {
pushStyle();
noFill();
strokeWeight(3);
// rect(0, 0, 100, 100 );

if (((tmp_x1-tmp_x0) > 3) && ((tmp_x1-tmp_x0) < G_DEF.F_W/2) && ((tmp_y1-tmp_y0) < G_DEF.F_H/2) && ((tmp_y1-tmp_y0) > 3)) {
stroke(0);
float minX = width-x0*G_DEF.DRAW_SCALE;
float minY = y0*G_DEF.DRAW_SCALE;
float wX = -(x1-x0)*G_DEF.DRAW_SCALE;
float hY = (y1-y0)*G_DEF.DRAW_SCALE;
float centX = minX+wX/2;
float centY = minY+hY/2;
rect(minX, minY, wX, hY );
line( centX-10, centY, centX+10, centY );
line( centX, centY-10, centX, centY+10 );
if (bKalmanEnabled) {
x0 = (float)filter_x0.update(tmp_x0);
y0 = (float)filter_y0.update(tmp_y0);
x1 = (float)filter_x1.update(tmp_x1);
y1 = (float)filter_y1.update(tmp_y1);
}
else {
x0 = tmp_x0;
y0 = tmp_y0;
x1 = tmp_x1;
y1 = tmp_y1;
}
stroke(255,0,0);
minX = width-x0*G_DEF.DRAW_SCALE;
minY = y0*G_DEF.DRAW_SCALE;
wX = -(x1-x0)*G_DEF.DRAW_SCALE;
hY = (y1-y0)*G_DEF.DRAW_SCALE;
centX = minX+wX/2;
centY = minY+hY/2;

rect(minX, minY, wX, hY );

line( centX-10, centY, centX+10, centY );
line( centX, centY-10, centX, centY+10 );
stroke(0,0,255);
line(lastCenter.x, lastCenter.y,centX, centY);
lastCenter.x = centX;
lastCenter.y = centY;

}
popStyle();
}
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UnknownMarch 12, 2016 at 5:21 AM
This comment has been removed by the author.
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AnonymousApril 18, 2016 at 9:47 AM
Hey David,

I used your code and worked well for me. Thank you for the detailed explanation. I am trying to connect 2 ov7670-fifo cameras to arduino mega. I needed help with it. Hoping to hear back. Thanks
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UnknownApril 20, 2016 at 6:47 AM
hey David

For working with arduino MEGA2560 what file I need to change ?

Thanks
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AnonymousApril 20, 2016 at 11:40 AM
Hey Can you tell me why are you using F_W to be 80 and F_H to be 60?
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AnonymousApril 25, 2016 at 5:37 PM
Hey David,
My project is still in the making..Will update you when that's done. In the mean time can u help me with another issue. I am trying to also connect this camera with raspberry pi board.
No documents on it have been found. Do you think its doable?

Thank you!
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AnonymousMay 4, 2016 at 1:18 PM
Hey.. I wanted to know one more thing. My OV7670 comes with HREF on pin 6 instead of WRST. So how do i use it in my code?
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UnknownJune 5, 2016 at 8:22 AM
Hello,i have a OV7670FIFO camera module, i want to take photos with it, i have arduino mega 2560.
I can't connect my arduino to the camera module.
Can you help me to do that ?
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UnknownJune 5, 2016 at 8:34 AM
Hello, can you help me to connect my arduino mega2560 with my camera module OV7670 FIFO ?
My pins are ( CS RRST WRST RD WE PWDN SCL VSYNCH SCL SDA XCLK D0 D1 D2 D3 D4 D5 D6 D7 ) i want a correspondance between my pins and those posted ?
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UnknownJune 10, 2016 at 10:09 AM
Hey David,

Can you tell me what ppb stands for and why is it divivded into 8,4,2,1,0?
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UnknownJune 11, 2016 at 2:07 AM
hello, please can you tell me how can i connect my camera module with my arduino mega 2560 ?
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UnknownJune 23, 2016 at 11:37 PM
This comment has been removed by the author.
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UnknownJune 23, 2016 at 11:38 PM
Hi David !! Thank for share your project on this Lab. This exactly project I need, but I have some problem.....
IN MY CASE:
+ I follow your schematic and use the same version of device as your project (Arduino promini 3.3V 8Mhz and Ov7670 version 1.0)
+ I get messege:
"_Initializing sensor...inited OK ...."
+ I have a STABLE running with baudrate setup in arduino sketch:
//static const unsigned long _BAUDRATE = 57600;
and in Processing sketch:
//public final static int BAUDRATE = 115200;

MY PROBLEM:
1/ The FPS of streaming image I have received on the processing GUI window (at 0PPB) just about 1.1111 fps. Its look not smooth than your demo in youtube (your is 3.333 fps). How can I increase FPS ?
2/ My image receive on GUI is too dark than your demo. In the light area, the image is not bright enough to see, just like a grey and dark, but if I turn the camera to the bright direction, I can see a little thing with higher light effect. How can I increase the brightness to get the better image ?
_Thank so much for your support and try to solve my problem !!
*Hope your reply soon & sorry for my bad English :d
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UnknownJune 24, 2016 at 4:50 AM
My serial wires just about 20cm.
Can you tell me the baudrate you have use to stream your project :D
And I still not understand my running will work well with setup follow this:
the processing baudrate = 2 x (arduino promini 3.3v 8mhz baudrate)
Anyway thank for your support too much. I will learning & research more on my case and report the better result to you :D
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ZeradAugust 27, 2016 at 9:07 AM
why am I having this problem ?

Arduino: 1.6.11 (Windows 10), Board: "Arduino Pro or Pro Mini, ATmega328 (3.3V, 8 MHz)"

C:\Users\Heaven\Documents\Arduino\sketch_aug26b\sketch_aug26b.ino: In function 'void vsyncIntFunc()':

sketch_aug26b:165: error: ambiguating new declaration of 'void vsyncIntFunc()'

void static __inline__ vsyncIntFunc() {

^

C:\Users\Heaven\Documents\Arduino\sketch_aug26b\sketch_aug26b.ino:165:19: note: old declaration 'int vsyncIntFunc()'

void static __inline__ vsyncIntFunc() {

^

exit status 1
ambiguating new declaration of 'void vsyncIntFunc()'

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
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UnknownNovember 27, 2016 at 11:58 PM
Hi David,
I'm using a GCC aduino Pro mini 3.3V. I set the baud rate for both the Processing and Arduino code to 500000.

I get:
Initializing sensor...
inited OK, sensor PID: 7673

Could not find the folder ...
ran opened the screen, but that is so black ...
squeezed space and went through all modes and nothing
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UnknownJanuary 24, 2017 at 9:07 AM
Hello David

I attempted to replicate your circuit but the following error shows up: Panic! INIT sensor keeps failing.. What's the reason? The output remains black as well
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UnknownApril 19, 2017 at 11:44 AM
Hey david !
I am very thankful for your effort on providing these help for using the module. But i am having some issues on displaying the images on the screen. Both the codes on arduino IDE and processing are verified with no any errors and also i have checked through some of these baudrates; 38400, 115200, 56700 and 500000 with all different modes. But still the output on processing is black.

When i randomly check through baudrates in serial monitor of the arduino IDE, it says;

initializing sensor...
retrying...
retrying...
retrying...
Panic! INIT sensor keeps failing.

and also in the processing console no any initialization messages shows up.
only something like;

[0] "COM5"

shows up.

Please reply soon!
and again thankyou.
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SalvaMarch 20, 2021 at 6:06 AM
Hi David, this is the output I get, but the when I run the .pde script, but the output windows (receive_stream) is black, nothing appears. Can you help me please?

"Arial" is not available, so another font will be used. Use PFont.list() to show available fonts.
[0] "/dev/ttyACM0"
[1] "/dev/ttyS0"
[2] "/dev/ttyS1"
[3] "/dev/ttyS2"
[4] "/dev/ttyS3"
[5] "/dev/ttyS4"
[6] "/dev/ttyS5"
[7] "/dev/ttyS6"
[8] "/dev/ttyS7"
[9] "/dev/ttyS8"
[10] "/dev/ttyS9"
[11] "/dev/ttyS10"
[12] "/dev/ttyS11"
[13] "/dev/ttyS12"
[14] "/dev/ttyS13"
[15] "/dev/ttyS14"
[16] "/dev/ttyS15"
[17] "/dev/ttyS16"
[18] "/dev/ttyS17"
[19] "/dev/ttyS18"
[20] "/dev/ttyS19"
[21] "/dev/ttyS20"
[22] "/dev/ttyS21"
[23] "/dev/ttyS22"
[24] "/dev/ttyS23"
[25] "/dev/ttyS24"
[26] "/dev/ttyS25"
[27] "/dev/ttyS26"
[28] "/dev/ttyS27"
[29] "/dev/ttyS28"
[30] "/dev/ttyS29"
[31] "/dev/ttyS30"
[32] "/dev/ttyS31"
[33] "/dev/ttyUSB0"
Initializing sensor...
inited OK, sensor PID: 7673
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Sep 27, 2014

Arduvision (I): embedded computer vision with arduino

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