- OV7670 camera (without FIFO)
- ESP32 DevKit V1
| OV7670 Pin | ESP32 Pin (Your Board) | GPIO | Notes |
|---|---|---|---|
| VCC | 3V3 | - | 3.3V ONLY! |
| GND | GND | - | Ground |
| SDA | IO21 | 21 | SCCB (I2C Data) |
| SCL | IO22 | 22 | SCCB (I2C Clock) |
| XCLK/ MCLK | IO4 | 4 | Needs PWM/clock signal |
| D0 | IO32 | 32 | Data line |
| D1 | IO33 | 33 | |
| D2 | IO34 | 34 | Input-only |
| D3 | IO35 | 35 | Input-only |
| D4 | SN / VN | 39 | (GPIO 39, input-only) |
| D5 | SP / VP | 36 | (GPIO 36, input-only) |
| D6 | IO18 | 18 | |
| D7 | IO19 | 19 | |
| PCLK | IO25 | 25 | Pixel clock |
| VSYNC/ VS | IO26 | 26 | Vertical sync |
| HREF/ HS | IO27 | 27 | Horizontal ref |
| RESET | 3V3 | - | Tie to 3.3V (or use GPIO) |
| PWDN | GND | - | Tie to GND (or use GPIO) |
[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600
lib_deps =
ESPAsyncWebServer
AsyncTCPThis is a working local server (LAN) that connects to Mobile/Router WiFi and serves a camera preview page with a placeholder stream:
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
const char* ssid = "spa";
const char* password = "12345678";
AsyncWebServer server(80);
void setup() {
Serial.begin(115200);
// Connect to WiFi (Station Mode)
WiFi.begin(ssid, password);
Serial.print("Connecting to WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("\nConnected to WiFi!");
Serial.println("IP Address: ");
Serial.println(WiFi.localIP());
// HTML Page
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
String html = R"rawliteral(
<!DOCTYPE html>
<html>
<head>
<title>ESP32 OV7670 Stream</title>
</head>
<body>
<h2>ESP32 Camera Stream</h2>
<img src="/stream" />
</body>
</html>
)rawliteral";
request->send(200, "text/html", html);
});
// Placeholder stream
server.on("/stream", HTTP_GET, [](AsyncWebServerRequest *request){
// This will be replaced with image data later
request->send(200, "image/jpeg", "", 0);
});
server.begin();
}
void loop() {
// No code here for now
}
