That's usually how most serial projects work, and the first thing you check when a serial port doesn't work. It sounds like you connected the camera serial ports to the arduino, so your sketch should set up a serial port at 38400 baud. Then once the arduino connects to the camera, you have to figure out how to get the snapshot to your desktop.

Spinel 2MP WDR Serial JPEG Color Camera Module TTL/UART Output, VC0706 Compatible, high baud Rate up to 921600bps, Arduino Compatible, P/N: SC20MPBTTL, Fully Customizable $45.00 Only 9 left in stock - order soon. Joined: Thu Jan 08, 2015 12:22 pm. Re: Problem with TTL Serial JPEG Camera and Arduino Yun. By adafruitsupportrick on Sat Jan 10, 2015 10:41 am. You can't use pins 2 and 3 on the Yun for software serial. Instead, connect the camera TX to pin 8 and the camera RX to pin 7. TTL Serial Camera I am using an Arduino Uno and I am trying to hook up a Camera to the RX and TX input/output. In the code for testing the camera, they use Serial1.begin.

Hello,
I am following the tutorial, https://learn.adafruit.com/ttl-serial-camera/using-comm-tool, to set up the TTL camera to take still images. I have bought and downloaded Parallels, and have arduino and commtool running in windows on there. Every time I get to the step about clicking on 'Get Version', I get the message 'Cmd time out'. I have tried adding 'Serial.begin(38400); Serial.println('starting');' as this person did to check the serial communication http://forums.adafruit.com/viewtopic.php?f=25&t=22936, but the serial is printing gibberish instead of 'starting'. Images below. Please note that I used blue wire for RX and green for TX. I have more images if needed, maximum of three means I can't put them all on this post. Breadboard seems to be wired as shown.

If you have an adafruit TTL Serial JPEG Camera you may have found that downloading an uncompressed 640×480 JPEG from the camera can take up to 15 seconds. Depending on your application this might be far too long!

To speed things up a bit you can add compression to the image. Adding up to 40% can decrease the download time for a picture to about 5 seconds but at the same time you have to sacrifice picture quality.

So how else can you speed up the transfer? How about upping the transfer speed!

The camera by default uses 38400 baud but it is capable of much more than this. The question though is how to change the settings?

The Arduino Uno can do up to 115200 baud so it seems like a good idea to me to set the camera to the same speed. This should improve the download times by a fair bit more. (At the present time I haven’t been able to test by how much.)

So how do you get the camera to run at this faster speed? adafruit provide a library for the Arduino that provides functions for virtually all the things you might want to use on the camera. Unfortunately, at present there isn’t a function for changing the baud. After doing a lot of hunting around the interwebs I found there were quite a few people wanting to change the baud but no answer on how to do it. I put my thinking hat on and after a few hours of experimenting I came up with the following test code…

#include <SoftwareSerial.h>

SoftwareSerial softSerial(2, 3); //Set Software serial to use Pins 2 and 3

Usb To Ttl Serial

char serInStr[100];
int serInIdx =0;
int serOutIdx =0;

void setup() {

Ttl Serial Camera

Serial.begin(9600); //Set Hardware Serial to 9600 baud - For outputting debug messages
Serial.println('Start');
softSerial.begin(38400); //Set Software serial to 38400 baud - Default setting for the camera
Serial.println('Softserial Baud has been set to 38400');
delay(10); //Pause for 10ms to let it all settle down. Probably not needed!

Arduino Usb Ttl

Serial.println('Get Camera Version');
getCamVers(); //Call getCamVers function

Ttl Serial Camera Arduino Code

Serial.println('Setting Camera Baud to 115200');
setBaudMax(); //Call setBaudMax function

Serial.println('Reset softSerial to 115200');
softSerial.end(); //Disconnect serial connection to camera
softSerial.begin(115200); //Reconnect serial connection to camera at 115200 baud

Serial.println('Get Camera Version again using 115200');
getCamVers(); //Check camera version again to prove everything is working at 115200

}

void loop() {
//Do nothing
}

void getCamVers() {

uint8_t ByteData[5]={0x56, 0x00, 0x11, 0x00}; //String of bytes that requests version number from camera
softSerial.write(ByteData,5); //Send string to camera

delay(10); //Pause to let the camera deal with the request

if(softSerial.available()){ //Check if serial buffer has a response from camera
while(softSerial.available()){ //Loop as long as the serial buffer contains data
serInStr[serInIdx] = softSerial.read(); //Read data from serial buffer. Copy into array
serInIdx++; //Increase array count by 1
}
}

for(serOutIdx=0; serOutIdx < serInIdx; serOutIdx++) { //Loop through array
Serial.print(serInStr[serOutIdx]); //Print each value in array to consol
}
Serial.println(); //Print end of line

}

void setBaudMax() {

uint8_t ByteData[7]={0x56, 0x00, 0x24, 0x03, 0x01, 0x0D, 0xA6}; //String that sets baud to 115200
softSerial.write(ByteData,7); //Send string to camera

//Should really check for a suitable response here!

}