Having trouble getting version of TTL serial camera

[rostov]

Hi,

I recently bought CV0706 based TTL serial camera and tried to follow tutorial to test the camera using Comm Tool. I connected power to Arduino's 5V, ground to GRD and TX (1) / RX (0) to camera's RX / TX respectively. I was able to open COM port to Arduino from Comm Tool, however pressing Get Version button results in command time out error. What am I doing wrong?

Thanks

[adafruit_support_rick]

Try reversing RX and TX

[rostov]

I did. I also noticed in the tutorial there are instructions to use divider registers as if camera's input voltage were 3.3V, however I see camera's voltage contact states 5V. So I didn't use two 10K resistors because that drops voltage to 2.5V and this will be not enough to power 3.3V camera.

What is the true voltage of this camera according to data sheet? Thanks

[adafruit_support_rick]

The divider resistors are for RX, not for power. Power it with 5V. Internally, the camera's RX expects 3.3V. dividing the 5V output signal from the Arduino to 2.5V avoids putting 5V into that pin, but 2.5V is still high enough to register as a logic high.

[rostov]

Ah, got it. Thanks. Did I burn anything by connecting to 5V?

[adafruit_support_rick]

Hard to say. Does it work now?

[rostov]

Unfortunately, no. I am also confused, if you say cameras RX needs (input) 3V why on the photo is its RX connected to Arduino's RX and not TX (output)? I followed picture with all connections and it wouldn't work. Is there any way to confirm the camera is working? Thanks

[adafruit_support_rick]

The camera in the picture is connected in pass-through mode so that the data will get to CommTool. You are not sending data to the Arduino, you are sending data as if you were the Arduino by using the Arduino's connection to the USB chip.

[rostov]

Well, that connection wouldn't work for me. Is it worth talking to guys at customer support for possible replacement if the camera might be faulty? Thanks

[adafruit_support_rick]

Can you post a picture of how you have it connected?

[rostov]

There is a swithch between red and white wires, so the colors go like this: white is 5V, black is ground, green is TX, red is RX.

[adafruit_support_rick]

Where is the ground wire back to the Arduino?

[rostov]

I see, I missed it. Thanks. Now, I connected blue wire, but still no life in camera (Arduino board was connected at the time of test).

[adafruit_support_rick]

OK. Let's try replacing the camera. Please email [email protected] with a link to this thread for a replacement camera

[rostov]

OK. Thank you for your time helping with this.