Here we introduced one OV7670 camera module just purchased online, including the communication of camera module and Arduino UNO, the using ways to take photo via camera module, and so on. This is an Arduino camera module, adopted the Surveillance cameras digital image processing chip-OV0706, specially designed for image acquisition and processing application, based on TTL communication interface, very convenient to connect with Arduino controller, able to read image and data via UART serial port, and then perform some image processing. This is a detailed DIY guide for the OV7670 TTL and UART camera, and you can also download the code from ElecFreaks.
Part 1 General description
This camera module has the capability to carry out image processing like AWB, AE, and AGC for the video signal from the CMOS sensor. Additionally, by combining other cutting-edge technologies like low light image enhancement processing and intelligent prediction and reduction of image noise, this module can produce high-quality digital video signals through a standard CCIR656 interface. OV7670 includes a built-in JPEG decoder that enables real-time encoding of captured images. External controllers can effortlessly access the M-JPEG video streams, allowing for a dual-stream camera design. OV7670 features motion detection and OSD display function with screen characters and pattern overlay support, and the ability to define detection area and sensitivity.
Part 2 Test OV7670 camera module
Step 1 Needed tool for testing
Hardware：
1. SD Module
2. Digital key module
3. Arduino UNO
4. Jumper wire
5. USB cable
software：
1. Camera_VC0706_TEST
2. Arduino IDE（download it from official website）
Step 2 Hardware connection
1. Connect the hardware as below：
2. Here below is the physical diagram???
Step 3 Software use and code programming
1. Firstly download the two files of Camera_VC0706_lib and Camera_VC0706_TEST from the Camera Module Code written by ElecFreaks and then unzip it.
2. Put the unzipped file of Camera_VC0706_lib into the Arduino IDE folder of Libraries.
3. Open unzipped file of Camera_VC0706_TEST, and the program the code into UNO. The detailed steps are demonstrated as below.
4. Click Tools，and then choose the board of Arduino uno like below
5. Click Tools / Serial Port，and then choose the corresponding COM number.
6. And then click the button of programming like below in red rectangle，program the code into the UNO board until done uploading appears.
7. Finally open the monitoring serial port as below in red rectangle.
8. When the serial port display the data like demonstrated below, you can press the digital keys to take a photo.
9. If photo was taken successfully, the serial port would be displayed as below
10. Until now, the module testing has been completed.
For more detail: OV7670 Camera Module DIY Guide
