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
Having trouble getting version of TTL serial camera
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- rostov
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- adafruit_support_rick
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Re: Having trouble getting version of TTL serial camera
Try reversing RX and TX
- rostov
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Re: Having trouble getting version of TTL serial camera
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
What is the true voltage of this camera according to data sheet? Thanks
- adafruit_support_rick
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Re: Having trouble getting version of TTL serial camera
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
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Re: Having trouble getting version of TTL serial camera
Ah, got it. Thanks. Did I burn anything by connecting to 5V?
- adafruit_support_rick
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Re: Having trouble getting version of TTL serial camera
Hard to say. Does it work now?
- rostov
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Re: Having trouble getting version of TTL serial camera
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
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Re: Having trouble getting version of TTL serial camera
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
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Re: Having trouble getting version of TTL serial camera
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
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Re: Having trouble getting version of TTL serial camera
Can you post a picture of how you have it connected?
- rostov
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Re: Having trouble getting version of TTL serial camera
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.
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- adafruit_support_rick
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Re: Having trouble getting version of TTL serial camera
Where is the ground wire back to the Arduino?
- rostov
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Re: Having trouble getting version of TTL serial camera
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).
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- adafruit_support_rick
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Re: Having trouble getting version of TTL serial camera
OK. Let's try replacing the camera. Please email [email protected] with a link to this thread for a replacement camera
- rostov
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Re: Having trouble getting version of TTL serial camera
OK. Thank you for your time helping with this.
Please be positive and constructive with your questions and comments.