Following the example i get the following error, can you please help me

[HenkLaracker]

Board Intel:i686:izmir_ec doesn't define a 'build.board' preference. Auto-set to: I686_IZMIR_EC WARNING: Category '' in library DallasTemperature is not valid. Setting to 'Uncategorized' WARNING: Category '' in library EEPROM is not valid. Setting to 'Uncategorized' WARNING: Category '' in library Ethernet is not valid. Setting to 'Uncategorized' WARNING: Category '' in library EthernetShield is not valid. Setting to 'Uncategorized' WARNING: Category '' in library OneWire is not valid. Setting to 'Uncategorized' WARNING: Category '' in library SD is not valid. Setting to 'Uncategorized' WARNING: Category '' in library SPI is not valid. Setting to 'Uncategorized' WARNING: Category '' in library Servo is not valid. Setting to 'Uncategorized' WARNING: Category '' in library SoftwareServo is not valid. Setting to 'Uncategorized' WARNING: Category '' in library TimerOne is not valid. Setting to 'Uncategorized' WARNING: Category '' in library USBHost is not valid. Setting to 'Uncategorized' WARNING: Category '' in library WiFi is not valid. Setting to 'Uncategorized' WARNING: Category '' in library Wire is not valid. Setting to 'Uncategorized' Warning: platform.txt from core 'Arduino i686 Boards' contains deprecated recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} "{build.path}/{archive_file}" "{object_file}", automatically converted to recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} "{archive_file_path}" "{object_file}". Consider upgrading this core. Grove_Indoor_Environment_Demo:69: error: 'getTempSensorValue' was not declared in this scope getTempSensorValue, ^ Grove_Indoor_Environment_Demo:70: error: 'getHumiSensorValue' was not declared in this scope getHumiSensorValue, ^ Grove_Indoor_Environment_Demo:71: error: 'getLightSensorValue' was not declared in this scope getLightSensorValue, ^ Grove_Indoor_Environment_Demo:72: error: 'getUVSensorValue' was not declared in this scope getUVSensorValue, ^ Grove_Indoor_Environment_Demo:73: error: 'getPIRSensorValue' was not declared in this scope getPIRSensorValue, ^ Grove_Indoor_Environment_Demo:74: error: 'getMoistrueSensorValue' was not declared in this scope getMoistrueSensorValue ^ Grove_Indoor_Environment_Demo:79: error: 'RelayHandle' was not declared in this scope pActuatorHandler ActuatorHandlerList[]={RelayHandle, BuzzerHandle, ServoHandle, SleepHandle}; ^ Grove_Indoor_Environment_Demo:79: error: 'BuzzerHandle' was not declared in this scope pActuatorHandler ActuatorHandlerList[]={RelayHandle, BuzzerHandle, ServoHandle, SleepHandle}; ^ Grove_Indoor_Environment_Demo:79: error: 'ServoHandle' was not declared in this scope pActuatorHandler ActuatorHandlerList[]={RelayHandle, BuzzerHandle, ServoHandle, SleepHandle}; ^ Grove_Indoor_Environment_Demo:79: error: 'SleepHandle' was not declared in this scope pActuatorHandler ActuatorHandlerList[]={RelayHandle, BuzzerHandle, ServoHandle, SleepHandle}; ^ exit status 1 'getTempSensorValue' was not declared in this scope

[lanselambor]

By Adding declaration of functions has solved your problem. thank you!