diff --git a/ino/intval2_2_serial/intval2_2_serial.ino b/ino/intval2_2_serial/intval2_2_serial.ino
new file mode 100644
index 0000000..ee06f67
--- /dev/null
+++ b/ino/intval2_2_serial/intval2_2_serial.ino
@@ -0,0 +1,405 @@
+boolean debug_state = false;
+
+//Can be controlled via serial
+//Buttons are optional
+//Exposure controls assumes use of a 120RPM motor
+//Uses TB6612FNG
+//Target board is an Adafruit Metro Mini,
+//also using an Uno as a dev board
+
+/*
+----------------------------------------------------
+Microswitch (use INPUT_PULLUP!!)
+GND-----\ | \-----PIN
+----------------------------------------------------
+*/
+
+const int MOTOR_RPM = 120;
+const int BOLEX_C = round((133 / (1.66 * 360)) * 1000); //bolex exposure constant
+const int FAST_PWM = 255;
+const int SLOW_PWM = 127;
+
+/* ------------------------------------------------
+ *  pins
+ * ------------------------------------------------*/
+//Adafruit Metro Mini
+const int PIN_INDICATOR = 13;
+const int PIN_MICRO = 7; //new in 2.2
+const int BUTTON[4] = {3, 6, 5, 4};  //trigger, direction, speed, delay
+
+//TB6612FNG
+const int STBY = 11; //standby
+//Motor A
+const int PWMA = 10; //Speed control 
+const int AIN1 = 9; //Direction
+const int AIN2 = 8; //Direction
+
+/* ------------------------------------------------
+ *  loop
+ * ------------------------------------------------*/
+const int LOOP_DELAY = 10;
+
+/* ------------------------------------------------
+ *  state
+ * ------------------------------------------------*/
+volatile int button_state[4] = {1, 1, 1, 1};
+volatile long button_time[4] = {0, 0, 0, 0};
+volatile long buttontime = 0;
+
+volatile boolean sequence = false;
+volatile boolean running = false;
+volatile boolean cam_dir = true;
+volatile boolean delaying = false;
+volatile boolean timed = false;
+
+volatile int counter = 0;
+
+volatile int micro_position = 0;
+volatile boolean micro_primed = false;
+
+unsigned long timer = 0;
+unsigned long frame_start = 0;
+unsigned long delay_start = 0;
+
+String timed_str = "600";
+unsigned long timed_val = 600;
+unsigned long timed_open = 300; //ms after start_frame to pause
+volatile boolean timed_paused = false;
+unsigned long timed_delay = 0;
+unsigned long timed_last = 0;
+unsigned long timed_avg = 600;
+
+volatile int fwd_speed = FAST_PWM;
+volatile int bwd_speed = FAST_PWM;
+
+volatile long seq_delay = 42;
+
+/* ------------------------------------------------
+ *  serial
+ * ------------------------------------------------*/
+
+const char cmd_camera = 'c'; //Trigger the camera to advance or rewind 1 frame
+const char cmd_cam_forward = 'e'; //Set camera direction to FORWARDS
+const char cmd_cam_backward = 'f'; //Set camera direction to BACKWARDS
+const char cmd_timed = 'n'; //Set camera exposure time: follow command immediately with number of millisecions, ie: 1000
+const char cmd_debug = 'd'; //Turn on debug messages, will break mcopy firmware
+const char cmd_connect = 'i'; //Confirm firmware on Arduino
+const char cmd_mcopy_identifier = 'm'; //Incoming identification char for mcopy use only
+const char cmd_cam_identifier = 'k'; //Response char for identifying device as camera
+
+volatile char cmd_char = 'z'; //Default null command
+
+const int serialDelay = 5;
+
+void setup() {
+  Serial_init();
+  Pins_init();
+  Buttons_init();
+}
+
+void loop() {
+  if (Serial.available()) {
+    /* read the most recent byte */
+    cmd_char = (char)Serial.read();
+  }
+  if (cmd_char != 'z') {
+    cmd(cmd_char);
+    cmd_char = 'z';
+  }
+  timer = millis();
+  Btn(0);
+  Btn(1);
+  Btn(2);
+  Btn(3);
+  if (sequence && delaying) {
+    Watch_delay();
+  }
+  
+  if (running) {
+    if (timed) {
+     Read_timed();  
+    } else {
+     Read_micro(); 
+    }
+  }
+  if (!running && !sequence && !delaying){ 
+    delay(LOOP_DELAY);
+  }
+}
+
+void cmd (char val) {
+  if (val == cmd_debug) {
+    debug();
+  } else if (val == cmd_connect) {
+    connect();
+  } else if (val == cmd_mcopy_identifier) {
+    identify();
+  } else if (val == cmd_camera) {
+    Frame();
+  } else if (val == cmd_cam_forward) {
+    cam_direction(true); //explicit
+  } else if (val == cmd_cam_backward) {
+    cam_direction(false);
+  } else if (val == cmd_timed) {
+    timedString();  
+  }
+}
+
+void debug () {
+  debug_state = true;
+  Serial.println(cmd_debug);
+  log("debugging enabled");
+}
+
+void connect () {
+  Serial.println(cmd_connect);
+  log("connect()");
+}
+
+void identify () {
+  Serial.println(cmd_cam_identifier);
+  log("identify()");  
+}
+
+//sending "0" will reset to default exposure time
+void timedString () {
+  while (Serial.available() == 0) {             
+    //Wait for timed string
+  }
+  timed_str = Serial.readString();
+  timed_val = timed_str.toInt();
+  if (timed_val < 600) {
+    timed_val = 600;
+    timed_str = "600";
+    timed = false;
+  } else {
+    timed_delay = timed_val - BOLEX_C;
+    timed = true;
+  }
+  Serial.println(cmd_timed);
+  log("Set exposure time to: ");
+  log(timed_str);
+}
+
+void Serial_init () {
+  Serial.begin(57600);
+  Serial.flush();
+  Serial.setTimeout(serialDelay);  
+}
+
+void Pins_init () {
+  pinMode(STBY, OUTPUT);
+  pinMode(PWMA, OUTPUT);
+  pinMode(AIN1, OUTPUT);
+  pinMode(AIN2, OUTPUT);
+
+  pinMode(PIN_MICRO, INPUT_PULLUP);
+  pinMode(PIN_INDICATOR, OUTPUT);
+}
+
+void Buttons_init () {
+  for (int i = 0; i < 4; i++) {
+    pinMode(BUTTON[i], INPUT_PULLUP);
+  }
+}
+
+void Btn (int index) {
+  int val = digitalRead(BUTTON[index]);
+  if (val != button_state[index]) {
+    if (val == LOW) { // pressed
+      button_time[index] = millis();
+      //button_start(index);
+    } else if (val == HIGH) { // not pressed
+      buttontime = millis() - button_time[index];
+      button_end(index, buttontime);
+    }
+  }
+  button_state[index] = val;
+}
+
+/*
+ * dormant for now
+ * void button_start (int index) {
+  if (index == 0) {
+  }
+}*/
+
+void button_end (int index, long buttontime) {
+  if (index == 0) {
+    if (buttontime > 1000) {
+      if (!sequence) {
+        sequence = true;
+        Output(2, 75);
+        Frame();
+      }
+    } else {
+       if (sequence) {
+        sequence = false;
+        //Output(2, 75);
+      } else {
+         Frame();
+      }
+    }
+  } else if (index == 1) { //set direction
+    if (buttontime < 1000) {
+      cam_dir = true;
+      Output(1, 500);
+    } else if (buttontime > 1000) {
+      cam_dir = false;
+      Output(2, 250);
+    }
+  } else if (index == 2) { // set speed
+    if (buttontime >= 1000) {
+      timed_delay = buttontime - BOLEX_C;
+      timed = true;
+      Output(2, 250);
+    } else if (buttontime < 1000) {
+      timed_delay = 0;
+      timed = false;
+      Output(1, 500);    
+    }
+  } else if (index == 3) { //set delay
+    if (buttontime < 42) {
+      seq_delay = 42;
+      Output(1, 500);
+    } else {
+      seq_delay = buttontime;
+      Output(2, 250);
+    }
+  }
+  buttontime = 0;
+}
+
+void Indicator (boolean state) {
+  if (state) {
+    digitalWrite(PIN_INDICATOR, HIGH);
+  } else {
+    digitalWrite(PIN_INDICATOR, LOW);
+  }
+}
+
+void Output (int number, int len) {
+  for (int i = 0; i < number; i++) {
+    Indicator(true);
+    delay(len);
+    Indicator(false);
+    delay(42);
+  }
+}
+
+void Frame () {
+  frame_start = millis();
+  if (cam_dir) {
+    digitalWrite(AIN1, HIGH);
+    digitalWrite(AIN2, LOW);
+    analogWrite(PWMA, fwd_speed);
+  } else {
+    digitalWrite(AIN1, LOW);
+    digitalWrite(AIN2, HIGH);
+    analogWrite(PWMA, bwd_speed);
+  }
+  digitalWrite(STBY, HIGH); //disable standby
+  running = true;
+  micro_primed = false;
+}
+
+boolean Read_delay () {
+  if (fwd_speed == FAST_PWM) {
+      if (timer - frame_start >= 300) {
+        return true;
+      }
+  } else {
+      if (timer - frame_start >= 600) {
+        return true;
+      }
+  }
+  return false;
+}
+
+void Watch_delay () {
+  if (timer - delay_start >= seq_delay) {
+    delaying = false;
+    Frame();
+  }
+}
+
+void Read_timed () {
+  if (!timed_paused) {
+    if (timer - frame_start > timed_open 
+      && timer - frame_start < timed_open + timed_delay) {
+       Pause_timed();
+    } else if (timer - frame_start > timed_open + timed_delay) {
+      micro_position = digitalRead(PIN_MICRO);
+      if (micro_position == HIGH) {
+        Stop();
+      }
+      delay(2);//smooths out signal  
+    }
+  } 
+  if (timed_paused && timer - frame_start > timed_open + timed_delay) {
+    Start_timed();   
+  }
+}
+
+void Pause_timed () {
+  timed_paused = true;
+  digitalWrite(STBY, LOW); //enable standby
+}
+
+void Start_timed () {
+  timed_paused = false;
+  digitalWrite(STBY, HIGH); //disable standby
+}
+
+void Read_micro () {
+  if (Read_delay()) {
+    micro_position = digitalRead(PIN_MICRO);
+    if (micro_position == LOW 
+        && micro_primed == false) {
+      micro_primed = true;
+    } else if (micro_position == HIGH 
+              && micro_primed == true) {
+      Stop();
+    }
+    delay(2);//smooths out signal
+  }
+}
+
+void Stop () {
+  delay(10);
+  digitalWrite(STBY, LOW); //enable standby
+  
+  running = false;
+  micro_primed = false;
+
+  if (cam_dir) {
+    counter += 1;  
+  } else {
+    counter -= 1;
+  }
+
+  timed_last = timer - frame_start;
+  timed_avg = (timed_avg + timed_last) / 2;
+
+  Serial.println(cmd_camera);
+  log("Frame completed");
+  log(String(timed_last));
+}
+
+void cam_direction (boolean state) {
+  cam_dir = state;
+  if (state) {
+    timed_open = 300;
+    Serial.println(cmd_cam_forward);
+    log("cam_direction -> true");
+  } else {
+    timed_open = 400;
+    Serial.println(cmd_cam_backward);
+    log("cam_direction -> false");
+  }
+}
+void log (String msg) {
+  if (debug_state) {
+    Serial.println(msg);
+  }
+}