Arduino error does not name a type

Question

I have written a library  but have problem with error does not name a type  I ve tryed everything  searched for couple of hours and no luck  Library is placed in the  libraries  folder of the arduino sketch folder  Please help    I am using OSX  but the same problem occurs on Windows also   This is header file of the library    ifndef OpticalSensor h  define OpticalSensor h   include  lt Arduino h gt   include  lt SD h gt   include  lt Wire h gt   include  lt Adafruit MCP23017 h gt   include  lt Adafruit RGBLCDShield h gt   include  lt String h gt   class OpticalSensor       public          OpticalSensor int analogPort           void LCDInit int columns  int rows           void SerialInit int bitRate           void SDInit            double amp  ReadFromAnalogPort            void SDCreateFile String fileName           void SDDeleteFile String fileName           void SDWriteToFile String fileName           void SDStreamToFile String Text           void SDOpenFileToStream String fileName       private          int  analogPort          bool  displayFlag          Adafruit RGBLCDShield  lcd          File  MainRecFile          double  voltage          void  LCDClearAll            void  LCDWriteInTwoRows String row1  String row2           void  DelayAndClearLCD bool returnStatus        endif   This is  cpp file of the library    include  lt OpticalSensor h gt   Adafruit RGBLCDShield  lcd  File  MainRecFile  double  voltage   OpticalSensor  OpticalSensor int analogPort         analogPort   analogPort     void OpticalSensor  LCDInit int columns  int rows          lcd   Adafruit RGBLCDShield         lcd begin columns rows      void OpticalSensor  SerialInit int bitRate        Serial begin bitRate        bitRate   bitRate      while  Serial              wait until serial is not open          void OpticalSensor  SDInit            On the Ethernet Shield  CS is pin 4  It s set as an output by default         Note that even if it s not used as the CS pin  the hardware SS pin         10 on most Arduino boards  53 on the Mega  must be left as an output        or the SD library functions will not work      pinMode 10  OUTPUT          check if SD can be found and initialized  Print also message to       Serial if initialized and to  lcd if initialized     if  SD begin 4          if Serial            Serial println  Initialization failed                 if  lcd             lcd print  Init failed                  DelayAndClearLCD true           else          if Serial               Serial println  Initialization done                     if  lcd               lcd print  Init done                      DelayAndClearLCD false           void OpticalSensor  SDCreateFile String fileName          check if file allready exists  if not it creates one       and writes apropriate response to       lcd and Serial if they are initialized      if SD exists fileName             if Serial                Serial println fileName     already exists                       if  lcd                 LCDWriteInTwoLines fileName  already exists                        DelayAndClearLCD false             else               if Serial                Serial println fileName    Creating file     fileName                             if  lcd                 LCDWriteInTwoLines  Creating file   fileName                      MainRecFile   SD open fileName     txt   FILE WRITE            MainRecFile close             DelayAndClearLCD false               check if file was created successffully and print apropriate response           to lcd and Serial if they are initialized         if SD exists fileName     txt                  if Serial                    Serial println fileName     txt      created successffully                               if  lcd                     LCDWriteInTwoLines fileName     txt    created                                DelayAndClearLCD false                     else               if Serial                    Serial println  error  failed to create file                               if  lcd                     LCDWriteInTwoLines  error  failed to   create file                                DelayAndClearLCD false                        delete file from SD card void OpticalSensor  SDDeleteFile String fileName          open file  write data to it  and close file after  void OpticalSensor  SDWriteToFile String fileName  String Text         MainRecFile   SD open fileName     txt   FILE WRITE        MainRecFile println Text        MainRecFile close         Open file to stream data to it  void OpticalSensor  SDOpenFileToStream String fileName         MainRecFile   SD open fileName     txt   FILE WRITE        Write data to file while file is open    Notice that you can stream data only to one file at a time      For instance  if you have two sensors that you want to   write data to two different files  you have to use SDWriteToFile   function    void OpticalSensor  SDStreamToFile String Text        if  MainRecFile             MainRecFile println Text              close file that you streamed data too  void OpticalSensor  SDCloseStreaming String fileName         MainRecFile close         clear entire LCD void OpticalSensor   LCDClearAll          lcd clear         lcd setCursor 0 0      void OpticalSensor   LCDWriteInTwoRows String row1  String row2          write first String in row1      lcd print row1         set cursor to the beginning of row 2      lcd setCursor 0 1         write second String to row 2      lcd print row2      void OpticalSensor   DelayAndClearLCD bool returnStatus          if Serial or  lcd are initialized  delay for 2 seconds       and clear LCD     if Serial     lcd            delay 2000           if  lcd               LCDClearAll                terminate     if bool    true            return           double amp  ReadFromAnalogPort          voltage   analogRead  analogPort       return  voltage      And this is the  ino file where library is included    include  lt OpticalSensor h gt   OpticalSensor sensor 0    void setup       sensor LCDInit 16 2     sensor SerialInit 9600     sensor SDInit      sensor SDCreateFile  test1      sensor SDOpenFileToStream  test1       void loop          this is the error      In file included from Test OpticalSensorLib ino 1     Users gaspersladic Documents Arduino libraries OpticalSensor OpticalSensor h 34    error   Adafruit RGBLCDShield  does not name a type    Users gaspersladic Documents Arduino libraries OpticalSensor OpticalSensor h 35    error   File  does not name a type

User · Answer

Don t know it this is your problem but it was mine   Void setup   does not name a type   BUT  void setup   is ok    I found that the sketch I copied for another project was full of  wrong case  letters  Onc efixed  it ran smoothly emphasized text

User · Answer

My code was out of void setup   or void loop   in Arduino

User · Answer

The only thing you have to do is adding this line to  your sketch   include  lt SPI h gt    before  include  lt Adafruit MAX31855 h gt

User · Answer

I found the solution to this problem in a      I did some changes to my sketch and forgot to check for     and I had an extra one  As soon as I deleted it and compiled everything was fine

User · Answer

The two includes you mention in your comment are essential    does not name a type  just means there is no definition for that identifier visible to the compiler   If there are errors in the LCD library you mention  then those need to be addressed - omitting the  include will definitely not fix it   Two notes from experience which might be helpful    You need to add all  include s to the main sketch - irrespective of whether they are included via another  include  If you add files to the library folder  the Arduino IDE must be restarted before those new files will be visible

User · Answer

I got the does not name a type error when installing the NeoMatrix library    Solution  the  cpp and  h files need to be in the top folder when you copy it  e g    myArduinoFolder libraries Adafruit NeoMatrix Adafruit NeoMatrix cpp   When I used the default Windows unzip program  it nested the contents inside another folder   myArduinoFolder libraries Adafruit NeoMatrix Adafruit NeoMatrix Adafruit NeoMatrix cpp   I moved the files up  so it was    myArduinoFolder libraries Adafruit NeoMatrix Adafruit NeoMatrix cpp   This fixed the does not name a type problem

User · Answer

Usually Header file syntax start with capital letter I found that code written all in smaller letter   ifndef DIAG H  define DIAG H   endif

User · Answer

More recently  I have found that other factors will also cause this error  I had an AES h  AES cpp containing a AES class and it gave this same unhelpful error  Only when I renamed to Encryption h  Encryption cpp and Encryption as the class name did it suddenly start working  There were no other code changes

[arduino] Arduino error: does not name a type?

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