Sony MultiPort 定义详解

int shutter = 13; //Assign the base of the transistors to digital pins
int focus = 12;
int pwr = 11;
String command;

void setup() {                
  // initialize the digital pin as an output.
  pinMode(shutter, OUTPUT);
  pinMode(focus, OUTPUT);      
  pinMode(pwr, OUTPUT);

  Serial.begin(9600);
}

void loop() {

  while(Serial.available()==0){}
  command = Serial.readString();
  if (command == "pwr"){
    command = " ";
    powerOn();
  } 
  if (command == "pic"){
    command = " ";
    takeImage();
    delay(5000);
  }
}

void powerOn(){
  digitalWrite(pwr, HIGH);    //PWR pin shorts to GND.
  delay(5000);                //wait 5 seconds for the camera to turn on. 
  digitalWrite(pwr, LOW);
}

void takeImage(){
  digitalWrite(focus,HIGH);   //FOCUS pin shorts to GND.
  delay(2);
  digitalWrite(shutter,HIGH); //SHUTTER pin shorts to GND.
  delay(100);                  //Give time for camera to respond. 
  digitalWrite(focus, LOW);   
  digitalWrite(shutter, LOW); 
}

https://www.the-home-cinema-guide.com/composite-video-signal.html

https://www.studio1productions.com/catalog.htm

https://picsngeek.at/constructions/combined-charger-and-trigger-cable-for-sony-mirrorless-cameras-like-a6400/

https://github.com/frank26080115/OpenMV-Astrophotography-Gear

https://github.com/epietrowicz/Sony-Multiport-Controller

https://wiki.mikrokopter.de/en/CamCtrl

http://controlyourcamera.blogspot.co.uk/2011/02/arduino-controlled-video-recording-over.html
http://controlyourcamera.blogspot.co.uk/2011/02/finding-out-lanc-remote-commands.html
http://marcuswolschon.blogspot.co.uk/2013/11/bmpcc-lanc-and-sysclk-dx-usbee-dx-clone.html

https://patentimages.storage.googleapis.com/aa/54/5c/77412db1fa8714/CN202710974U.pdf