esp8266-mqtt-projector-serial/esp/include/benqx3000i.cpp

#ifndef _BENQ_X3000I_H_
#define _BENQ_X3000I_H_

#include <Arduino.h>


enum Input {
  HDMI1 = 1,
  HDMI2 = 2,
  HDMI3 = 3,
  UNKNOWN = 127,
};

void setup() {
  Serial.begin(9600);
  Serial.setTimeout(1000);
  client.enableLastWillMessage("tele/" TOPIC "/LWT", "Offline");
}

int8_t queryPower() {
  Serial.print("\r*pow=?#\r");
  Serial.flush();
  Serial.readStringUntil('\r');
  String line = Serial.readStringUntil('\r');
  if (line.length() < 6) {
    Serial.print("\r*pow=?#\r");
    Serial.flush();
    Serial.readStringUntil('\r');
    line = Serial.readStringUntil('\r');
  }
  if (line == "*pow=on#") {
    return 1;
  } else if (line == "*pow==off#") {
    return 0;
  }
  return -1;
}

Input parseInput(const String& input) {
  if (input == "HDMI1") return HDMI1;
  if (input == "HDMI2") return HDMI2;
  if (input == "HDMI3") return HDMI3;
  return UNKNOWN;
}

String inputToString(Input input) {
  if (input == HDMI1) return "HDMI1";
  if (input == HDMI2) return "HDMI2";
  if (input == HDMI3) return "HDMI3";
  return "UNKNOWN";
}

void sendInputCommand(Input input) {
  switch(input) {
  case HDMI1:
    Serial.print("\r*sour=hdmi#\r");
    break;
  case HDMI2:
    Serial.print("\r*sour=hdmi2#\r");
    break;
  case HDMI3:
    Serial.print("\r*sour=smartsystem#\r");
    break;
  default:
    break;
  }
  Serial.flush();
  Serial.readStringUntil('\r');
}

Input parseInputState(const String& line) {
  if (line == "*sour=hdmi#") return HDMI1;
  if (line == "*sour=hdmi2#") return HDMI2;
  if (line == "*sour=smartsystem#") return HDMI3;
  return UNKNOWN;
}

Input queryInput() {
  Serial.print("\r*sour=?\r");
  Serial.flush();
  Serial.readStringUntil('\r');
  String line = Serial.readStringUntil('\r');
  if (line.length() < 8) {
    Serial.print("\r*sour=?\r");
    Serial.flush();
    Serial.readStringUntil('\r');
    line = Serial.readStringUntil('\r');
  }
  if (line.length() <8) {
    return UNKNOWN;
  }
  return parseInputState(line);
}

void onInput(const String& message) {
  Input state = queryInput();
  Input desiredState = parseInput(message);
  if (state != desiredState && desiredState != UNKNOWN) {
    sendInputCommand(desiredState);
    state = queryInput();
  }
  client.publish("resp/" TOPIC "/input", inputToString(state), true);
}

void onPower(const String& message) {
  bool state = queryPower();
  if (message == "ON" || message == "OFF") {
    bool desiredState = message == "ON";
    if (state != desiredState) {
      if (desiredState) {
	Serial.print("\r*pow=on#\r");
	Serial.flush();
	Serial.readStringUntil('\r');
	Serial.readStringUntil('\r');
	for (uint8_t i = 0; i < 5; ++i) {
	  state = queryPower();
	  if (state) {
	    break;
	}
	}
      } else {
	for (uint8_t i = 0; i < 3; ++i) {
	  Serial.print("\r*pow=on#\r");
	  Serial.flush();
	  Serial.readStringUntil('\r');
	  Serial.readStringUntil('\r');
	  delay(1000);
	}
	for (uint8_t i = 0; i < 5; ++i) {
	  state = queryPower();
	  if (!state) {
	    break;
	  }
	}
      }
    }
  }
  client.publish("resp/" TOPIC "/power", state ? "ON" : "OFF", true);
}

void onConnectionEstablished() {
  client.subscribe("cmnd/" TOPIC "/power", onPower);
  client.subscribe("cmnd/" TOPIC "/input", onInput);
  client.publish("tele/" TOPIC "/LWT", "Online", true);
}


void loop() {
  client.loop();
}


#endif