Error positive was not declared in this scope

#include <OneWire.h>
#include <DallasTemperature.h>
#include <Wire.h>
// #include <LCD.h>
#include <LiquidCrystal_I2C.h>  // F Malpartida's NewLiquidCrystal library
#define ONE_WIRE_BUS 10    // NOTE: No ";" on #define  
#define I2C_ADDR    0x27  // Define I2C Address for the PCF8574A

OneWire ds(ONE_WIRE_BUS);
DallasTemperature sensors(&ds);
// LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7);

/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 16 chars 2 line display
// Set the pins on the I2C chip used for LCD connections:
//                    addr, en,rw,rs,d4,d5,d6,d7,bl,blpol

/*****************************************************************************
* Sketch: DS18B20_LCD.pde
* Author: A. Kriwanek
* Version: 1.0  02.04.2011/10:00
* based on OneWire Library 2.0 from http://www.pjrc.com/teensy/td_libs_OneWire.html
* and the provided example sketch.
* (Authors: Jim Studt, Tom Pollard, "RJL20", Robin James, Paul Stoffregen)
*
* Digital Pin 2 for 1Wire bus
* Pull Up Resistor 4k7 between Digital Pin 12 and +5V
* Temperature sensor(s) Dallas 18B20 for testing
*
* This sketch searches for Dallas 1Wire temperature sensors. If a sensor is found,
* the hardware id, the data from scratchpad and the actual temperature is transmitted
* via the serial interface. Additionally the values are displayed on the LCD.
*
*
* This sketch is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
*****************************************************************************/

// OneWire  ds(12);                      // 1Wire Instance on Arduino digital pin 2
// LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
// Define some values used by the panel and buttons:

byte i;
byte present = 0;
byte data[12];
byte addr[8];
float Temp;

void setup(void) {
  lcd.setBacklightPin(3,POSITIVE);
  Serial.begin(9600);            // Start serial interface with 9600 Baud
  lcd.begin(16, 2);              // Start the LCD library for 2x16 display
  lcd.setCursor(0,0);
  lcd.print(" TESTPROGRAMM ");
  lcd.setCursor(0,1);
  lcd.print(" Dallas DS18B20 ");
  delay(3000);
  lcd.clear();
}
......

Build options changed, rebuilding all

Verwende die Bibliothek OneWire im Ordner: C:Program Files (x86)ArduinolibrariesOneWire (legacy)

Verwende die Bibliothek dallas_temperature_control im Ordner: C:Program Files (x86)Arduinolibrariesdallas_temperature_control (legacy)

Verwende die Bibliothek Wire im Ordner: C:Program Files (x86)ArduinohardwarearduinoavrlibrariesWire (legacy)

C:Program Files (x86)Arduinohardwaretoolsavrbinavr-g++ -c -g -Os -w -fno-exceptions -ffunction-sections -fdata-sections -MMD -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=156 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR -IC:Program Files (x86)Arduinohardwarearduinoavrcoresarduino -IC:Program Files (x86)Arduinohardwarearduinoavrvariantsmega -IC:Program Files (x86)ArduinolibrariesOneWire -IC:Program Files (x86)Arduinolibrariesdallas_temperature_control -IC:Program Files (x86)ArduinohardwarearduinoavrlibrariesWire C:UserspapaAppDataLocalTempbuild5311542397420308395.tmpDS18B20_i2cLCD_ino​.cpp -o C:UserspapaAppDataLocalTempbuild5311542397420308395.tmpDS18B20_i2cLCD_ino​.cpp.o

DS18B20_i2cLCD_ino.ino:15: error: 'LiquidCrystal_I2C' does not name a type
DS18B20_i2cLCD_ino.ino: In function 'void setup()':
DS18B20_i2cLCD_ino.ino:59: error: 'lcd' was not declared in this scope
DS18B20_i2cLCD_ino.ino:59: error: 'POSITIVE' was not declared in this scope
DS18B20_i2cLCD_ino.ino: In function 'void display_1WSensor()':
DS18B20_i2cLCD_ino.ino:134: error: 'lcd' was not declared in this scope

#include <OneWire.h>
#include <DallasTemperature.h>

#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>  // F Malpartida's NewLiquidCrystal library
#define ONE_WIRE_BUS 10    // NOTE: No ";" on #define  
#define I2C_ADDR    0x27  // Define I2C Address for the PCF8574A

OneWire ds(ONE_WIRE_BUS);
DallasTemperature sensors(&ds);
// LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
LiquidCrystal_I2C  lcd(0x27,2,1,0,4,5,6,7);

/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 16 chars 2 line display
// Set the pins on the I2C chip used for LCD connections:
//                    addr, en,rw,rs,d4,d5,d6,d7,bl,blpol

/***************************************************************************** 
 * Sketch: DS18B20_LCD.pde
 * Author: A. Kriwanek
 * Version: 1.0  02.04.2011/10:00
 * based on OneWire Library 2.0 from http://www.pjrc.com/teensy/td_libs_OneWire.html
 * and the provided example sketch.
 * (Authors: Jim Studt, Tom Pollard, "RJL20", Robin James, Paul Stoffregen)
 *
 * Digital Pin 2 for 1Wire bus
 * Pull Up Resistor 4k7 between Digital Pin 12 and +5V
 * Temperature sensor(s) Dallas 18B20 for testing
 *
 * This sketch searches for Dallas 1Wire temperature sensors. If a sensor is found,
 * the hardware id, the data from scratchpad and the actual temperature is transmitted
 * via the serial interface. Additionally the values are displayed on the LCD.
 *
 *
 * This sketch is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 *****************************************************************************/

// OneWire  ds(12);                      // 1Wire Instance on Arduino digital pin 2
// LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
// Define some values used by the panel and buttons:

byte i;
byte present = 0;
byte data[12];
byte addr[8];
float Temp;

void setup(void) {
  lcd.setBacklightPin(3,POSITIVE);
  Serial.begin(9600);            // Start serial interface with 9600 Baud
  lcd.begin(16, 2);              // Start the LCD library for 2x16 display
  lcd.setCursor(0,0);
  lcd.print(" TESTPROGRAMM ");
  lcd.setCursor(0,1);
  lcd.print(" Dallas DS18B20 ");
  delay(3000);
  lcd.clear();
}

void loop(void) {
  if ( !ds.search(addr)) {
    // No more Dallas chips present:
    Serial.print("No more addresses.n");
    ds.reset_search();
    delay(250);
    return;
  }

  // Output 64 Bit hardware id of Dallas Chip:
  Serial.print("R=");
  for( i = 0; i < 8; i++) {
    Serial.print(addr[i], HEX);
    Serial.print(" ");
  }

  // Check for invalid CRC in address:
  if ( OneWire::crc8( addr, 7) != addr[7]) {
    Serial.print("CRC is not valid!n");
    return;
  }

  // Check for family code which is not DS18B20:
  if ( addr[0] != 0x28) {
    Serial.print("Device is not a DS18B20 family device.n");
    return;
  }

  // The DallasTemperature library can do all this work for you!
  ds.reset();
  ds.select(addr);
  ds.write(0x44,0);          // start conversion, with parasite power off

  delay(1000);               // maybe 750ms is enough, maybe not

  // Check whether chip is present:
  present = ds.reset();
  ds.select(addr);    
  ds.write(0xBE);             // Read Scratchpad

  Serial.print("P=");         // Present = 1
  Serial.print(present,HEX);
  Serial.print(" ");
  for ( i = 0; i < 9; i++) {   // we need 9 bytes of data
    data[i] = ds.read();
    Serial.print(data[i], HEX);
    Serial.print(" ");
  }
  Serial.print(" CRC=");
  Serial.print( OneWire::crc8( data, 8), HEX);
  // Calculate temperature. data[1] High Byte, data[0] Low Byte.
  Temp =  ((data[1] << 8) + data[0] ) * 0.0625;  // 12Bit = 0,0625 C per Bit
  Serial.print( " T=");
  Serial.print( Temp, 2);
  Serial.print( " C");
  Serial.println();
  display_1WSensor();
}

void display_1WSensor(){
  // display Sensor data on LCD:
  char line[17];
  // Hardware ID:
  sprintf(line, "%02X%02X%02X%02X%02X%02X%02X%02X", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]);
  lcd.setCursor(0,0);         // move to the begining of the second line
  lcd.print(line);
  // Temperature in Hex:
  lcd.setCursor(0,1);
  sprintf(line, "D=%02X%02X", data[1], data[0]);
  lcd.print(line);
  // Temperature as Degree Celsius:
  lcd.setCursor(7,1); 
  //sprintf(line, "T=%f C", Temp); funktioniert nicht, Fehler in Compiler?
  dtostrf(Temp, 5, 2, line);  // funktionierende Alterntative: http://dereenigne.org/electronics/arduino/arduino-float-to-string
  lcd.print("T=");
  lcd.print(line);
  lcd.print(" C");
}