File imgFile = SD.open(filename);
Serial.println("Sending image by BT");
while (imgFile.available()){
Serial1.write(imgFile.read());
}
imgFile.close();
单字节发送感觉比较费时,可不可以放到字节数组里面发送呢?
File imgFile = SD.open(filename);
Serial.println("Sending image by BT");
while (imgFile.available()){
Serial1.write(imgFile.read());
}
imgFile.close();
单字节发送感觉比较费时,可不可以放到字节数组里面发送呢?