The IndusBoard Coin V2, a compact ESP32-S2-based improvement board measuring simply 3.3 cm, is a wonderful platform for constructing ultra-small embedded initiatives. Mixed with the OV2640 digicam module, this mission showcases tips on how to create a compact, Wi-Fi-based spy digicam able to dwell video streaming. This makes it appropriate for dwelling safety, child monitoring, or discreet surveillance purposes.
Makes use of and Purposes
- Safety & Surveillance: Deploy in small areas for distant monitoring.
- Residence Automation: Monitor rooms, doorways, or restricted areas.
- Wearable Expertise: Can be utilized for body-worn spy cameras.
- IoT & Embedded Imaginative and prescient: Helpful for AI-based visible processing initiatives.
The mission makes use of the IndusBoard Coin V2’s onboard Wi-Fi capabilities to host an internet server that streams real-time video. The OV2640 digicam captures photos and transmits them by way of Wi-Fi in a number of pixel codecs, which might be seen on any system linked to the identical community.
The digicam operates in AP mode, that means it creates its personal Wi-Fi community, making it extremely transportable and impartial of current networks.
Invoice of Supplies
Circuit
Coin V2 makes use of particular GPIO pins to interface with the OV2640 digicam module. Under is a breakdown of the important thing pin connections:
- XCLK (GPIO 44) → Gives an exterior clock sign to the digicam (20 MHz).
- PCLK (GPIO 39) → Pixel clock, synchronizing knowledge switch from the digicam to the ESP32.
- VSYNC (GPIO 21) → Vertical synchronization sign, marking the beginning of a brand new body.
- HREF (GPIO 1) → Horizontal synchronization sign, marking the beginning of a brand new line in a body.
- SDA (GPIO 8) & SCL (GPIO 9) → I2C communication pins used for digicam configuration.
- RESET (GPIO 2) → Used to reset the digicam module if wanted.
- PWDN (GPIO -1) → Energy-down management (not used, so set to -1).
- Digital camera Knowledge Pins (D0-D7)
The digicam captures photos as uncooked pixel knowledge, which is transmitted over an 8-bit parallel interface:
Code
Code begins by together with the mandatory libraries: esp_camera.h for digicam management, WiFi.h for wi-fi connectivity, and WebServer.h for internet hosting an internet interface.
The pin configuration is outlined utilizing GPIO assignments for clock, sync, and knowledge alerts to appropriately initialize the OV2640 digicam. The initCamera() operate units up the digicam parameters similar to body dimension, pixel format, and clock frequency earlier than initializing it with esp_camera_init().
The webpage HTML is embedded throughout the code, designed with a easy format to show the dwell digicam feed inside a resizable body. It features a dropdown menu to change between completely different pixel codecs (JPEG, YUV422, RGB565, or Grayscale) and dynamically updates the stream.
The Coin V2 digicam operates in WiFi Entry Level (AP) mode, permitting customers to attach on to the system, nevertheless, the STA mode may also be used.
When the server receives a request at /stream, the handle_jpg_stream() operate captures frames from the digicam buffer utilizing esp_camera_fb_get() and transmits them as multipart photos, enabling dwell streaming. The loop() constantly handles shopper requests, guaranteeing a clean video feed
Testing
Now, energy the system after which both with a 3.3V DC adapter or a 3.3V DC battery utilizing the three.3V and GND pins on the board.
Then open your wifi settings, seek for Indusbaord CAM wifi SISD, and hook up with it utilizing the password you will have set within the code. After which after connection, open any net browser and search 191.168.4.1, after which you possibly can see the live-streamed video.
