![]() The Netduino driver currently implements 4 major functions. If you’re using a Netduino Plus, don’t worry about that part □ ![]() Please refer to my earlier post on how to connect an SD card reader to the Netduino if you aren’t familiar with the procedure. In addition, you’ll want to connect an SD card reader to your Netduino so that you can store snapshots. To make things a bit easier while testing the camera with a breadboard, I built a connector using a standard 0.1″ pitch right-angle header and a small section of prototyping board: unfortunately, the breakout board of the camera uses a different pitch. The only difference worth mentioning is that the voltage divider configuration shown in the adafruit tutorial is not necessary on the Netduino, since its GPIO pins are 5 volt tolerant. So, you can simply connect the TX pin of the camera to PIN 0 (RX) on the Netduino and the RX pin of the camera to PIN 1 (TX) on the Netduino. Limor’s tutorial on how to interface the camera with the Arduino outlines the required steps rather well, so I won’t re-iterate them here. In some instances, some camera functions such as OSD (text overlay) are not supported in the firmware even though the datasheet documents them or only behave properly if called in a particular sequence, which of course, is not documented… Connecting the camera to the Netduino While interfacing with the camera over the TTL UART of the Netduino is straight forward, the datasheet describing the protocol and commands required to control the camera functions is painfully sketchy and sometime inaccurate. In many respects, this device is very similar to the LinkSprite camera, which has been out there for some time now.Īs I’m working on a security-related project involving the Netduino, it was the perfect opportunity to put this camera to the test, starting with writing a C# driver. ![]() The communication with the camera is done over a TTL UART up to 115200 bauds. The camera supports three resolutions (640×480, 320×240 and 160×120), has a built-in motion detection circuit and can output an NTSC signal, all in a fairly compact form factor. Earlier this month, AdaFruit released a nice little TTL camera, perfect for security and remote monitoring applications.
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