8000 Add dedicated sketch for WebSerial · arduino/ArduinoCore-mbed@28d4e37 · GitHub
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Add dedicated sketch for WebSerial
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‎libraries/Camera/examples/CameraCaptureWebSerial/CameraCaptureWebSerial.ino

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/*
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* This example shows how to capture images from the camera and send them over Web Serial.
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*
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* There is a companion web app that receives the images and displays them in a canvas.
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* It can be found in the "extras" folder of this library.
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* The on-board LED lights up while the image is being sent over serial.
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*
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* Instructions:
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* 1. Make sure the correct camera is selected in the #include section below by uncommenting the correct line.
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* 2. Upload this sketch to your camera-equipped board.
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* 3. Open the web app in a browser (Chrome or Edge) by opening the index.html file in the "extras" folder.
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*
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* Initial author: Sebastian Romero @sebromero
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*/
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#include "camera.h"
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#ifdef ARDUINO_NICLA_VISION
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#include "gc2145.h"
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GC2145 galaxyCore;
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Camera cam(galaxyCore);
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#define IMAGE_MODE CAMERA_RGB565
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#elif defined(ARDUINO_PORTENTA_H7_M7)
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// uncomment the correct camera in use
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#include "hm0360.h"
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HM0360 himax;
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// #include "himax.h";
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// HM01B0 himax;
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Camera cam(himax);
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#define IMAGE_MODE CAMERA_GRAYSCALE
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#elif defined(ARDUINO_GIGA)
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#include "ov767x.h"
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// uncomment the correct camera in use
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OV7670 ov767x;
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// OV7675 ov767x;
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Camera cam(ov767x);
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#define IMAGE_MODE CAMERA_RGB565
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#else
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#error "This board is unsupported."
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#endif
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/*
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Other buffer instantiation options:
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FrameBuffer fb(0x30000000);
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FrameBuffer fb(320,240,2);
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If resolution higher than 320x240 is required, please use external RAM via
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#include "SDRAM.h"
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FrameBuffer fb(SDRAM_START_ADDRESS);
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...
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// and adding in setup()
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SDRAM.begin();
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*/
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#define CHUNK_SIZE 512 // Size of chunks in bytes
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#define RESOLUTION CAMERA_R320x240
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FrameBuffer fb;
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unsigned long lastUpdate = 0;
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void blinkLED(uint32_t count = 0xFFFFFFFF) {
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while (count--) {
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digitalWrite(LED_BUILTIN, LOW); // turn the LED on (HIGH is the voltage level)
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delay(50); // wait for a second
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digitalWrite(LED_BUILTIN, HIGH); // turn the LED off by making the voltage LOW
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delay(50); // wait for a second
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}
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}
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void setup() {
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pinMode(LED_BUILTIN, OUTPUT);
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// Init the cam QVGA, 30FPS
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if (!cam.begin(RESOLUTION, IMAGE_MODE, 30)) {
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blinkLED();
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}
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blinkLED(5);
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}
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void sendFrame(){
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// Grab frame and write to serial
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if (cam.grabFrame(fb, 3000) == 0) {
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byte* buffer = fb.getBuffer();
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size_t bufferSize = cam.frameSize();
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digitalWrite(LED_BUILTIN, LOW);
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// Split buffer into chunks
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for(size_t i = 0; i < bufferSize; i += CHUNK_SIZE) {
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size_t chunkSize = min(bufferSize - i, CHUNK_SIZE);
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Serial.write(buffer + i, chunkSize);
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Serial.flush();
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delay(1); // Optional: Add a small delay to allow the receiver to process the chunk
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}
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digitalWrite(LED_BUILTIN, HIGH);
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} else {
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blinkLED(20);
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}
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}
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void sendCameraConfig(){
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Serial.write(IMAGE_MODE);
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Serial.write(RESOLUTION);
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Serial.flush();
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delay(1);
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}
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void loop() {
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if(!Serial) {
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Serial.begin(115200);
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while(!Serial);
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}
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if(!Serial.available()) return;
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byte request = Serial.read();
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switch(request){
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case 1:
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sendFrame();
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break;
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case 2:
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sendCameraConfig();
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break;
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}
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}

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