#include <ArduinoJson.h>

int IncomingByte;
int intCount = 0;

int LED1 = 5;
int LED2 = 6;

char jsonRead[200] = "";

void setup(){
  Serial.begin(14400);
  delay(5000);
  Serial.println("***COM IN***");
  delay(3000);
  Serial.println("***COMOUT***");
}

void loop() {
  StaticJsonBuffer<200> jsonBuffer;

  while ( Serial.available() > 0) {
    IncomingByte = Serial.read();

    if (IncomingByte == 10) {
      for (int i = 0; i < 200; i ++) {
        jsonRead[i] = 0;
      }
      intCount = 0;
    } else if (IncomingByte == 13) {
      JsonObject& jsonRcv = jsonBuffer.parseObject(jsonRead);
      if (!jsonRcv.success()) {
        return;
      } else {
      }
      const char* jsonOut1 = jsonRcv["C1"];
      const char* jsonOut2 = jsonRcv["C2"];
      const char* jsonOut3 = jsonRcv["C3"];
      const char* jsonOut4 = jsonRcv["C4"];

      int ctrl10[4];
      int ctrl1[4];
      int ctrl[4];

      ctrl10[0] = *(jsonOut1) - 64;
      ctrl10[1] = *(jsonOut2) - 64;
      ctrl10[2] = *(jsonOut3) - 64;
      ctrl10[3] = *(jsonOut4) - 64;

      ctrl1[0] = *(jsonOut1 + 1) - 64;
      ctrl1[1] = *(jsonOut2 + 1) - 64;
      ctrl1[2] = *(jsonOut3 + 1) - 64;
      ctrl1[3] = *(jsonOut4 + 1) - 64;

      int vol[4];
      int vol10[4];
      int vol1[4];

      vol10[0] = *(jsonOut1 + 2) - 48;
      vol10[1] = *(jsonOut2 + 2) - 48;
      vol10[2] = *(jsonOut3 + 2) - 48;
      vol10[3] = *(jsonOut4 + 2) - 48;

      vol1[0] = *(jsonOut1 + 3) - 48;
      vol1[1] = *(jsonOut2 + 3) - 48;
      vol1[2] = *(jsonOut3 + 3) - 48;
      vol1[3] = *(jsonOut4 + 3) - 48;

      for (int i = 0; i < 4; i++) {
        vol[i] = vol10[i] * 10 + vol1[i];
        ctrl[i] = ctrl10[i] * 10 + ctrl1[i];
        Control(ctrl[i], vol[i]);
      }
    } else {
      int intTempchar;
      intTempchar = IncomingByte;
      if (intTempchar != 0){
        jsonRead[intCount] = IncomingByte;
        intCount ++;
      }
    }
  }

}

void Control(int ctrl, int vol) {
  switch (ctrl) {
    case 11:
      analogWrite(LED1, vol * 2.5);
      break;
    case 22:
      analogWrite(LED2, vol * 2.5);
      break;
    default:
      analogWrite(LED1,120);
      break;
  }

}