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Closed
Robiv8 opened this issue
Mar 30, 2018
· 9 comments
Closed
‘RTC’ was not declared in this scope
#49
Robiv8 opened this issue
Mar 30, 2018
· 9 comments
Comments
sketch_mar30a:13: error: ‘RTC’ was not declared in this scope
setSyncProvider(RTC.get); // the function to get the time from the RTC
^
exit status 1
‘RTC’ was not declared in this scope
Arduino 1.8.5 say the DS3232 is INKOMPATIBEL?
What board are you using?
Do you have the latest release of the library (1.2.0)?
Hallo,
Yes, I downloaded it here a few hours ago.
Board is NodeMCU 1.0 (ESP-12E) Module its a ESP8266MOD Amica
For architectures other than AVR, you need to instantiate an RTC object, for example:
Then use that object for all library calls, for example:
setSyncProvider(myRTC.get);
Thank you very much for the Info
The documentation was lacking regarding non-AVR architectures and has now been updated with release 1.2.1.
Need update the example TimeRTC:
// Arduino DS3232RTC Library // https://github.com/JChristensen/DS3232RTC // // Example sketch illustrating Time library with Real Time Clock. // This example is identical to the example provided with the Time Library, // only the #include statement has been changed to include the DS3232RTC library. #include <DS3232RTC.h> // https://github.com/JChristensen/DS3232RTC DS3232RTC RTC; // <------------------------ "Added" void setup() { Serial.begin(9600); setSyncProvider(RTC.get); // the function to get the time from the RTC if(timeStatus() != timeSet) Serial.println("Unable to sync with the RTC"); else Serial.println("RTC has set the system time"); } void loop() { digitalClockDisplay(); delay(1000); } void digitalClockDisplay() { // digital clock display of the time Serial.print(hour()); printDigits(minute()); printDigits(second()); Serial.print(' '); Serial.print(day()); Serial.print(' '); Serial.print(month()); Serial.print(' '); Serial.print(year()); Serial.println(); } void printDigits(int digits) { // utility function for digital clock display: prints preceding colon and leading 0 Serial.print(':'); if(digits < 10) Serial.print('0'); Serial.print(digits); }
@rtek1000 why do you reply to a closed issue? What board are you using?
The need to define a DS3232RTC object for non-AVR architectures is documented here in the README file.
-
Добрый день, есть скетч зарядно-разрядного устройства. Схемотехнику всю собрал (http://f007.ru/tag/avtomobili/) а скетч при загрузке пишет ошибку
charger.ino: In function ‘void setup()’:
charger:21: error: ‘RTC’ was not declared in this scope
charger:30: error: ‘DS1307_SQW32KHZ’ was not declared in this scope
charger.ino: In function ‘void loop()’:
charger:39: error: ‘RTC’ was not declar// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
#include <EEPROM.h>
#include <Wire.h>
#include <DS1307.h>
#include «RTClib.h»
#include <LiquidCrystal_I2C.h>
int rtc[7];
byte rr[7];
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display
#define RELE_NAGRUZKA 2 //объявляем работу реле нагрузки на пине 2
#define RELE_ZARYADKA 3 //объявляем работу реле зарядки на пине 3
int analogPin = 0;
int flag=0;
float val=0;
float valkoef=0;void setup ()
{
DDRC|=_BV(2) |_BV(3); // POWER:Vcc Gnd
PORTC |=_BV(3); // VCC PINC3
RTC.get(rtc,true);
lcd.init(); // initialize the lcd
lcd.backlight();
lcd.home();
pinMode(RELE_NAGRUZKA, OUTPUT); //инициируем реле только на выход
pinMode(RELE_ZARYADKA, OUTPUT); //инициируем реле только на выход
lcd.clear();
digitalWrite(RELE_NAGRUZKA, HIGH);
digitalWrite(RELE_ZARYADKA, HIGH);
RTC.SetOutput(DS1307_SQW32KHZ);
EEPROM.write (0, rtc[2]); // при старте записываем значение времени, часы
EEPROM.write (1, rtc[1]); // при старте записываем значение времени, минуты
}void loop ()
{
val = analogRead(analogPin); // считываем значение напряжения с аналогового порта
valkoef=val/74,49; // приводим снятое с аналогового пина значение к обычным вольтам
RTC.get(rtc,true);
lcd.setCursor (0,0);
lcd.print (rtc[2]);
lcd.print («:»);
lcd.print (rtc[1]);
lcd.print («:»);
lcd.print (rtc[0]);
lcd.print (» str»);
lcd.print (EEPROM.read(0));
lcd.print («:»);
lcd.print (EEPROM.read(1));
lcd.setCursor (0,1);
lcd.print (valkoef);
lcd.print (» «);
lcd.print (flag);
if (valkoef < 10.72)
{
flag=1;
EEPROM.write(2, rtc[2]); // записыываем время окончания разрядки, часы
EEPROM.write (3, rtc[1]); // записыываем время окончания разрядки, минуы
}
if (flag==1)
{
digitalWrite(RELE_ZARYADKA, LOW); // включаем зарядку
digitalWrite(RELE_NAGRUZKA, HIGH); // выключаем нагрузку
lcd.print (» stp»);
lcd.print (EEPROM.read(2)); // выводим время окончания разрядки
lcd.print («:»);
lcd.print (EEPROM.read(3));
}
if ((valkoef > 10.72) &&(flag==0))
{
digitalWrite(RELE_NAGRUZKA, LOW);
}
else
{
digitalWrite(RELE_NAGRUZKA, LOW);
}
delay(500);
}Не могу понять как исправить.
-
Ругается на отсутсвие объекта RTC. Где брали библиотеки для часов?
-
C:UsersiwizardDesktopchargercharger.ino:4:20: fatal error: DS1307.h: No such file or directory
#include <DS1307.h>
^
compilation terminated.
exit status 1
Ошибка компиляции для платы Arduino/Genuino Uno. -
Библиотека у вас не установлена.
-
Если подкидываю библиотеку DS1307 то вылазят новые ошибки
C:UsersiwizardDesktopchargercharger.ino: In function ‘void setup()’:charger:22: error: ‘class RTC_DS1307’ has no member named ‘get’
RTC.get(rtc,true);
^
charger:31: error: ‘class RTC_DS1307’ has no member named ‘SetOutput’
RTC.SetOutput(DS1307_SQW32KHZ);
^
charger:31: error: ‘DS1307_SQW32KHZ’ was not declared in this scope
RTC.SetOutput(DS1307_SQW32KHZ);
^
C:UsersiwizardDesktopchargercharger.ino: In function ‘void loop()’:
charger:40: error: ‘class RTC_DS1307’ has no member named ‘get’
RTC.get(rtc,true);
^
exit status 1
‘class RTC_DS1307’ has no member named ‘get’ -
Библиотека, которую вы установили не имеет методов get, SetOutput.
Советую обратиться к автору скетча за ссылками на библиотеки, которые он использовал. -
#include <DS1307.h>
#include «RTClib.h»Две библиотеки для RTC — так и должно быть, или все же одна лишняя?
Digital Clock using LED Matrix P10 Module
Build a digital clock with Matrix P10 LED based on Arduino UNO. LED Matrix P10 is now often used for displays such as text display (moving sign / running text). In addition to practical, LED module Matrix P10 is also flexible to development. Just adjust to the size of writing / display that we will make.
Hardware Requirement
- LED Matrix P10 Module
- Arduino UNO
- Power supply +5 Volt
- RTC DS1307 Module
Modul RTC DS1307 | Source
Schematic
Arduino — LED Matrix P10 (DMD) Wiring
Arduino — RTC DS1307 Wiring
Source Code/Sketch
#include <Wire.h>
#include <DS1307.h>
#include <SPI.h>
#include <DMD.h>
#include <TimerOne.h>
#include «SystemFont5x7.h»
#define DISPLAYS_ACROSS 1
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);
int a;
char b[8];
String str;
void ScanDMD()
{
dmd.scanDisplayBySPI();
}
void setup()
{
RTC.stop();
RTC.start();
Serial.begin(9600);
Timer1.initialize( 5000 );
Timer1.attachInterrupt( ScanDMD );
dmd.clearScreen( true );
}
void loop()
{
str=»»;
int h(RTC.get(DS1307_HR,true));
int m(RTC.get(DS1307_MIN,false));
dmd.clearScreen( true );
str=String(h)+»:»+String(m);
str.toCharArray(b,6);
dmd.selectFont(SystemFont5x7);
dmd.drawString( 1, 4, b, 5, GRAPHICS_NORMAL );
delay(5000);
}
How it Works
Digital clock will be shown on the LED Matrix P10 module with interesting view
Download the required file.
Problem compiling code using RTClib.h
— Wed Jun 12, 2013 8:54 pm
#160440
I have been working on a datalogger with a timestamp and started by looking at example code provided by Sparkfun on the DS1307 product page. I have not been able to get any of the examples to compile. A long list of compile errors are given. I am using Arduino ERW 1.04 with the RTClib available by following links from the Sparkfun site so assume it is the right version of RTClib (I have found several others and even tried some of those). A typical compiler errors are:
In file included from C:UsersFaderDocumentsArduinolibrariesRTClib/RTC_DS1307.h:7,
from C:UsersFaderDocumentsArduinolibrariesRTClibRTC_DS1307.cpp:13:
C:UsersFaderDocumentsArduinolibrariesRTClib/RTClib.h:5: error: redefinition of ‘class DateTime’
C:UsersFaderDocumentsArduinolibrariesRTClib/RTClib.h:5: error: previous definition of ‘class DateTime’
C:UsersFaderDocumentsArduinolibrariesRTClib/RTClib.h:29: error: redefinition of ‘class RTC_DS1307’
C:UsersFaderDocumentsArduinolibrariesRTClib/RTClib.h:29: error: previous definition of ‘class RTC_DS1307’
C:UsersFaderDocumentsArduinolibrariesRTClibRTC_DS1307.cpp: In static member function ‘static void RTC_DS1307::adjust(const DateTime&)’:
C:UsersFaderDocumentsArduinolibrariesRTClibRTC_DS1307.cpp:48: error: ‘bin2bcd’ was not declared in this scope
C:UsersFaderDocumentsArduinolibrariesRTClibRTC_DS1307.cpp: In static member function ‘static DateTime RTC_DS1307::now()’:
C:UsersFaderDocumentsArduinolibrariesRTClibRTC_DS1307.cpp:66: error: ‘bcd2bin’ was not declared in this scope
If anyone can point out to me what I am missing I would appreciate the help.
Thanks.
— Thu Jun 13, 2013 9:22 am
#160456
The error messages are telling you that there are duplicate definitions for certain constants, and that you are missing the code for the function bcd2bin. Look through ALL the source files to see why.
— Thu Jun 13, 2013 3:40 pm
#160469
Thanks, I had a good look at the files in the RTClib folder and found that I had both «RTClib.h/cpp» and «DS1307.h/.cpp» in the folder, I think the compiler was trying to take definitions from both sets even though only RTClib.h was called in the program. Anyway, deleting the DS1307 files did the trick.
СОДЕРЖАНИЕ ►
- Произошла ошибка при загрузке скетча в Ардуино
- programmer is not responding
- a function-definition is not allowed arduino ошибка
- expected initializer before ‘}’ token arduino ошибка
- ‘что-то’ was not declared in this scope arduino ошибка
- No such file or directory arduino ошибка
- Compilation error: Missing FQBN (Fully Qualified Board Name)
Ошибки компиляции Arduino IDE возникают при проверке или загрузке скетча в плату, если код программы содержит ошибки, компилятор не может найти библиотеки или переменные. На самом деле, сообщение об ошибке при загрузке скетча связано с невнимательностью самого программиста. Рассмотрим в этой статье все возможные ошибки компиляции для платы Ардуино UNO R3, NANO, MEGA и пути их решения.
Произошла ошибка при загрузке скетча Ардуино
Самые простые ошибки возникают у новичков, кто только начинает разбираться с языком программирования Ардуино и делает первые попытки загрузить скетч. Если вы не нашли решение своей проблемы в статье, то напишите свой вопрос в комментариях к этой записи и мы поможем решить вашу проблему с загрузкой (бесплатно!).
avrdude: stk500_recv(): programmer is not responding
Что делать в этом случае? Первым делом обратите внимание какую плату вы используете и к какому порту она подключена (смотри на скриншоте в правом нижнем углу). Необходимо сообщить Arduino IDE, какая плата используется и к какому порту она подключена. Если вы загружаете скетч в Ардуино Nano V3, но при этом в настройках указана плата Uno или Mega 2560, то вы увидите ошибку, как на скриншоте ниже.
Такая же ошибка будет возникать, если вы не укажите порт к которому подключена плата (это может быть любой COM-порт, кроме COM1). В обоих случаях вы получите сообщение — плата не отвечает (programmer is not responding). Для исправления ошибки надо на панели инструментов Arduino IDE в меню «Сервис» выбрать нужную плату и там же, через «Сервис» → «Последовательный порт» выбрать порт «COM7».
a function-definition is not allowed here before ‘{‘ token
Это значит, что в скетче вы забыли где-то закрыть фигурную скобку. Синтаксические ошибки IDE тоже распространены и связаны они просто с невнимательностью. Такие проблемы легко решаются, так как Arduino IDE даст вам подсказку, стараясь отметить номер строки, где обнаружена ошибка. На скриншоте видно, что строка с ошибкой подсвечена, а в нижнем левом углу приложения указан номер строки.
expected initializer before ‘}’ token / expected ‘;’ before ‘}’ token
Сообщение expected initializer before ‘}’ token говорит о том, что вы, наоборот где-то забыли открыть фигурную скобку. Arduino IDE даст вам подсказку, но если скетч довольно большой, то вам придется набраться терпения, чтобы найти неточность в коде. Ошибка при компиляции программы: expected ‘;’ before ‘}’ token говорит о том, что вы забыли поставить точку с запятой в конце командной строки.
‘что-то’ was not declared in this scope
Что за ошибка? Arduino IDE обнаружила в скетче слова, не являющиеся служебными или не были объявлены, как переменные. Например, вы забыли продекларировать переменную или задали переменную ‘DATA’, а затем по невнимательности используете ‘DAT’, которая не была продекларирована. Ошибка was not declared in this scope возникает при появлении в скетче случайных или лишних символов.
Например, на скриншоте выделено, что программист забыл продекларировать переменную ‘x’, а также неправильно написал функцию ‘analogRead’. Такая ошибка может возникнуть, если вы забудете поставить комментарий, написали функцию с ошибкой и т.д. Все ошибки также будут подсвечены, а при нескольких ошибках в скетче, сначала будет предложено исправить первую ошибку, расположенную выше.
exit status 1 ошибка компиляции для платы Arduino
Данная ошибка возникает, если вы подключаете в скетче библиотеку, которую не установили в папку libraries. Например, не установлена библиотека ИК приемника Ардуино: fatal error: IRremote.h: No such file or directory. Как исправить ошибку? Скачайте нужную библиотеку и распакуйте архив в папку C:Program FilesArduinolibraries. Если библиотека установлена, то попробуйте скачать и заменить библиотеку на новую.
Довольно часто у новичков выходит exit status 1 ошибка компиляции для платы arduino uno /genuino uno. Причин данного сообщения при загрузке скетча в плату Arduino Mega или Uno может быть огромное множество. Но все их легко исправить, достаточно внимательно перепроверить код программы. Если в этом обзоре вы не нашли решение своей проблемы, то напишите свой вопрос в комментариях к этой статье.
missing fqbn (fully qualified board name)
Ошибка возникает, если не была выбрана плата. Обратите внимание, что тип платы необходимо выбрать, даже если вы не загружаете, а, например, делаете компиляцию скетча. В Arduino IDE 2 вы можете использовать меню выбора:
— список плат, которые подключены и были идентифицированы Arduino IDE.
— или выбрать плату и порт вручную, без подключения микроконтроллера.
New to C++. In the following program I’m writing I get this error:
g++ -o Blob blob.cc
blob.cc: In function 'int nonrecursivecountcells(color (*)[7], int, int)':
blob.cc:41: error: 'grid' was not declared in this scope
Here is the code:
#include <iostream>
enum color {BACKGROUND, ABNORMAL, TEMPORARY};
const int ROW_SIZE = 7;
const int COL_SIZE = 7;
int nonrecursivecountcells(color[ROW_SIZE][COL_SIZE], int, int);
using namespace std;
int main()
{
color grid[ROW_SIZE][COL_SIZE] =
{{BACKGROUND, ABNORMAL, BACKGROUND, ABNORMAL, BACKGROUND, BACKGROUND, BACKGROUND},
{ABNORMAL, ABNORMAL, BACKGROUND, ABNORMAL, BACKGROUND, BACKGROUND, BACKGROUND},
{BACKGROUND, BACKGROUND, ABNORMAL, ABNORMAL, BACKGROUND, BACKGROUND, ABNORMAL},
{BACKGROUND, BACKGROUND, BACKGROUND, ABNORMAL, ABNORMAL, ABNORMAL, BACKGROUND},
{BACKGROUND, BACKGROUND, BACKGROUND, ABNORMAL, BACKGROUND, BACKGROUND, BACKGROUND},
{BACKGROUND, BACKGROUND, BACKGROUND, BACKGROUND, BACKGROUND, ABNORMAL, BACKGROUND},
{BACKGROUND, ABNORMAL, ABNORMAL, BACKGROUND, BACKGROUND, BACKGROUND, ABNORMAL}};
cout << "Enter row number" << endl;
int row;
cin >> row;
cout << "Enter column number" << endl;
int column;
cin >> column;
int number = nonrecursivecountcells(grid, row, column);
cout << "Number off cells in the blob that contains grid[" << row << "][" << column << "] are: " << number << endl;
return 0;
}
int nonrecursivecountcells(color[ROW_SIZE][COL_SIZE], int row, int column)
{
if (row < 0 || row >= ROW_SIZE || column < 0 || column >= COL_SIZE)
{
return 0;
}
else if (grid[row][column] != ABNORMAL)
{
return 0;
}
else
{
grid[row][column] = TEMPORARY;
return 1
+ nonrecursivecountcells(grid, row - 1, column - 1) + nonrecursivecountcells(grid, row - 1, column)
+ nonrecursivecountcells(grid, row - 1, column + 1) + nonrecursivecountcells(grid, row, column + 1)
+ nonrecursivecountcells(grid, row + 1, column + 1) + nonrecursivecountcells(grid, row + 1, column)
+ nonrecursivecountcells(grid, row + 1, column - 1) + nonrecursivecountcells(grid, row, column - 1);
}
}
Can anyone help me out here? Thanks.
Ok, so I tried the very latest release and I don’t even know where to start with that….
How the hell does a new release go from one or two errors to this shower of sh*t?
Command:570: error: variable or field ‘printDirectory’ declared void
void printDirectory(File dir, int numTabs) {
^
Command:570: error: ‘File’ was not declared in this scope
Command:570: error: expected primary-expression before ‘int’
void printDirectory(File dir, int numTabs) {
^
Networking:414: error: variable or field ‘SSDP_schema’ declared void
void SSDP_schema(WiFiClient &client) {
^
Networking:414: error: ‘WiFiClient’ was not declared in this scope
Networking:414: error: ‘client’ was not declared in this scope
void SSDP_schema(WiFiClient &client) {
^
_N001_Email:113: error: ‘WiFiClient’ was not declared in this scope
boolean NPlugin_001_MTA(WiFiClient& client, String aStr, const String &aWaitForPattern)
^
_N001_Email:113: error: ‘client’ was not declared in this scope
boolean NPlugin_001_MTA(WiFiClient& client, String aStr, const String &aWaitForPattern)
^
_N001_Email:113: error: expected primary-expression before ‘aStr’
boolean NPlugin_001_MTA(WiFiClient& client, String aStr, const String &aWaitForPattern)
^
_N001_Email:113: error: expected primary-expression before ‘const’
boolean NPlugin_001_MTA(WiFiClient& client, String aStr, const String &aWaitForPattern)
^
_N001_Email:113: error: expression list treated as compound expression in initializer [-fpermissive]
boolean NPlugin_001_MTA(WiFiClient& client, String aStr, const String &aWaitForPattern)
^
C:ProjectssonoffESPeasyFW2SourceESPeasyCommand.ino: In function ‘bool safeReadStringUntil(Stream&, String&, char, unsigned int, unsigned int)’:
Command:28: error: ‘LOG_LEVEL_ERROR’ was not declared in this scope
addLog(LOG_LEVEL_ERROR, F(«Not enough bufferspace to read all input data!»));
^
Command:36: error: ‘LOG_LEVEL_ERROR’ was not declared in this scope
addLog(LOG_LEVEL_ERROR, F(«Timeout while reading input data!»));
^
C:ProjectssonoffESPeasyFW2SourceESPeasyCommand.ino: In function ‘void ExecuteCommand(byte, const char*)’:
Command error: ‘Settings’ was not declared in this scope
if (Settings.NotificationEnabled[Par1 — 1] && Settings.Notification[Par1 — 1] != 0)
^
Command:103: error: ‘NPLUGIN_NOT_FOUND’ was not declared in this scope
if (NotificationProtocolIndex!=NPLUGIN_NOT_FOUND)
^
Command:105: error: aggregate ‘EventStruct TempEvent’ has incomplete type and cannot be defined
struct EventStruct TempEvent;
^
Command:108: error: ‘NPlugin_ptr’ was not declared in this scope
NPlugin_ptr[NotificationProtocolIndex](NPLUGIN_NOTIFY, &TempEvent, message);
^
Command:108: error: ‘NPLUGIN_NOTIFY’ was not declared in this scope
NPlugin_ptr[NotificationProtocolIndex](NPLUGIN_NOTIFY, &TempEvent, message);
^
Command:117: error: ‘RTC’ was not declared in this scope
RTC.flashDayCounter = 0;
^
Command:134: error: ‘File’ was not declared in this scope
File root = SD.open(«/»);
^
Command:134: error: expected ‘;’ before ‘root’
File root = SD.open(«/»);
^
Command:135: error: ‘root’ was not declared in this scope
root.rewindDirectory();
^
Command:136: error: ‘printDirectory’ was not declared in this scope
printDirectory(root, 0);
^
Command:147: error: ‘SD’ was not declared in this scope
SD.remove((char*)fname.c_str());
^
Command:152: error: ‘lowestRAM’ was not declared in this scope
Serial.print(lowestRAM);
^
Command:154: error: ‘lowestRAMfunction’ was not declared in this scope
Serial.println(lowestRAMfunction);
^
Command:167: error: ‘loopCounterLast’ was not declared in this scope
Serial.print(100 — (100 * loopCounterLast / loopCounterMax));
^
Command:167: error: ‘loopCounterMax’ was not declared in this scope
Serial.print(100 — (100 * loopCounterLast / loopCounterMax));
^
Command:185: error: ‘SecuritySettings’ was not declared in this scope
Serial.println(sizeof(SecuritySettings));
^
Command:187: error: ‘Settings’ was not declared in this scope
Serial.println(sizeof(Settings));
^
Command:189: error: ‘ExtraTaskSettings’ was not declared in this scope
Serial.println(sizeof(ExtraTaskSettings));
^
Command:191: error: ‘Device’ was not declared in this scope
Serial.println(sizeof(Device));
^
Command:203: error: ‘Wire’ was not declared in this scope
Wire.beginTransmission(Par1); // address
^
Command:212: error: ‘Wire’ was not declared in this scope
Wire.beginTransmission(Par1); // address
^
Command:228: error: ‘Settings’ was not declared in this scope
Settings.Build = Par1;
^
Command:235: error: ‘Settings’ was not declared in this scope
Settings.deepSleep = 0;
^
Command:245: error: ‘Wire’ was not declared in this scope
Wire.beginTransmission(address);
^
Command:267: error: aggregate ‘EventStruct TempEvent’ has incomplete type and cannot be defined
struct EventStruct TempEvent;
^
Command:286: error: ‘UserVar’ was not declared in this scope
UserVar[(VARS_PER_TASK * (Par1 — 1)) + Par2 — 1] = result;
^
Command:286: error: ‘VARS_PER_TASK’ was not declared in this scope
UserVar[(VARS_PER_TASK * (Par1 — 1)) + Par2 — 1] = result;
^
Command:298: error: ‘RULES_TIMER_MAX’ was not declared in this scope
if (Par1>=1 && Par1<=RULES_TIMER_MAX)
^
Command:303: error: ‘RulesTimer’ was not declared in this scope
RulesTimer[Par1 — 1] = millis() + (1000 * Par2);
^
Command:306: error: ‘RulesTimer’ was not declared in this scope
RulesTimer[Par1 — 1] = 0L;
^
Command:310: error: ‘LOG_LEVEL_ERROR’ was not declared in this scope
addLog(LOG_LEVEL_ERROR, F(«TIMER: invalid timer number»));
^
Command:324: error: ‘Settings’ was not declared in this scope
Settings.UseRules = true;
^
Command:326: error: ‘Settings’ was not declared in this scope
Settings.UseRules = false;
^
Command:335: error: ‘Settings’ was not declared in this scope
if (Settings.UseRules)
^
Command:351: error: ‘WiFi’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«Publish»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:351: error: ‘WL_CONNECTED’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«Publish»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:361: error: ‘MQTTclient’ was not declared in this scope
MQTTclient.publish(topic.c_str(), value.c_str(), Settings.MQTTRetainFlag);
^
Command:361: error: ‘Settings’ was not declared in this scope
MQTTclient.publish(topic.c_str(), value.c_str(), Settings.MQTTRetainFlag);
^
Command:365: error: ‘WiFi’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«SendToUDP»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:365: error: ‘WL_CONNECTED’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«SendToUDP»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:375: error: ‘IPAddress’ was not declared in this scope
IPAddress UDP_IP(ipaddress[0], ipaddress[1], ipaddress[2], ipaddress[3]);
^
Command:375: error: expected ‘;’ before ‘UDP_IP’
IPAddress UDP_IP(ipaddress[0], ipaddress[1], ipaddress[2], ipaddress[3]);
^
Command:376: error: ‘portUDP’ was not declared in this scope
portUDP.beginPacket(UDP_IP, port.toInt());
^
Command:376: error: ‘UDP_IP’ was not declared in this scope
portUDP.beginPacket(UDP_IP, port.toInt());
^
Command:381: error: ‘WiFi’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«SendToHTTP»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:381: error: ‘WL_CONNECTED’ was not declared in this scope
if (strcasecmp_P(Command, PSTR(«SendToHTTP»)) == 0 && WiFi.status() == WL_CONNECTED)
^
Command:389: error: ‘WiFiClient’ was not declared in this scope
WiFiClient client;
^
Command:389: error: expected ‘;’ before ‘client’
WiFiClient client;
^
Command:390: error: ‘client’ was not declared in this scope
if (client.connect(host.c_str(), port.toInt()))
^
Command:407: error: ‘LOG_LEVEL_DEBUG’ was not declared in this scope
addLog(LOG_LEVEL_DEBUG, line);
^
Command:422: error: ‘SecuritySettings’ was not declared in this scope
strcpy(SecuritySettings.WifiSSID, Line + 9);
^
Command:428: error: ‘SecuritySettings’ was not declared in this scope
strcpy(SecuritySettings.WifiKey, Line + 8);
^
Command:434: error: ‘SecuritySettings’ was not declared in this scope
strcpy(SecuritySettings.WifiSSID2, Line + 10);
^
Command:440: error: ‘SecuritySettings’ was not declared in this scope
strcpy(SecuritySettings.WifiKey2, Line + 9);
^
Command:470: error: ‘Settings’ was not declared in this scope
Settings.Unit=Par1;
^
Command:476: error: ‘Settings’ was not declared in this scope
strcpy(Settings.Name, Line + 5);
^
Command:482: error: ‘SecuritySettings’ was not declared in this scope
strcpy(SecuritySettings.Password, Line + 9);
^
Command:503: error: ‘WiFi’ was not declared in this scope
WiFi.persistent(true); // use SDK storage of SSID/WPA parameters
^
Command:529: error: ‘Settings’ was not declared in this scope
Settings.SerialLogLevel = Par1;
^
Command:536: error: ‘Settings’ was not declared in this scope
if (!str2ip(TmpStr1, Settings.IP))
^
Command:547: error: ‘IPAddress’ was not declared in this scope
IPAddress ip = WiFi.localIP();
^
Command:547: error: expected ‘;’ before ‘ip’
IPAddress ip = WiFi.localIP();
^
Command:548: error: ‘ip’ was not declared in this scope
sprintf_P(str, PSTR(«%u.%u.%u.%u»), ip[0], ip[1], ip[2], ip[3]);
^
Command:550: error: ‘BUILD’ was not declared in this scope
Serial.print(F(» Build : «)); Serial.println((int)BUILD);
^
Command:551: error: ‘Settings’ was not declared in this scope
Serial.print(F(» Name : «)); Serial.println(Settings.Name);
^
Command:553: error: ‘SecuritySettings’ was not declared in this scope
Serial.print(F(» WifiSSID : «)); Serial.println(SecuritySettings.WifiSSID);
^
C:ProjectssonoffESPeasyFW2SourceESPeasyCommand.ino: At global scope:
Command:570: error: variable or field ‘printDirectory’ declared void
void printDirectory(File dir, int numTabs) {
^
Command:570: error: ‘File’ was not declared in this scope
Command:570: error: expected primary-expression before ‘int’
void printDirectory(File dir, int numTabs) {
^
ESPEasy:4: error: expected declaration before end of line
#pragma GCC diagnostic warning «-Wall»
Arduino programming is an open-source and simple stage that arranges the Arduino board into working with a particular goal in mind. An Arduino code is written in C++ yet with extra capacities and strategies. An Arduino is an equipment and programming stage broadly utilised in hardware.
In this article, we go through three quick fixes for the error ‘was not declared in this scope’.
Also read: How to solve the Tower of Hanoi problem using Python?
What does the error mean?
Every programming language has a concept of Scope. Scope tells us where a specific variable, constant or function is accessible and usable. It refers to the area of code a statement, block, or name. The scope of an entity determines where that entity is usable in other parts of the program. The scope of a block determines where that block can be used in other blocks, and the scope of a name determines where that name can be used in other names.
There are two types of scope in programming languages: local and global. Local scope refers to the identifiers and symbols visible inside a block of code. Global scope, on the other hand, refers to the identifiers and symbols visible outside a block of code.
The error ‘was not declared in this scope’ generally occurs when a variable or function is not accessible to its call. A global variable in Arduino is the variable that is declared outside any function, including the setup() and loop() functions. Any variable declared inside a function or loop has restrictive access and is a local variable.
If any other function calls a local variable, it gives an error. To call any variable or function in any other function, including the setup() and loop() function, it should be declared as a global variable.
Also read: How to stop an Arduino program?
There are the quick fixes for the Arduino error: was not declared in the scope.
Declare the variable
Before assigning a value to the variable, make sure to define it. There are 16 data types commonly used in Arduino coding. Each data type expresses the nature of the value assigned to it. If the data type and value doesn’t match, an error arises. Also, if a variable is assigned any value without its declaration or data type, the error occurs.
Always ensure to declare the variable before the assignment. There are two ways to do this.
There are three variables in the above example – num1, num2 and num3. The variable num1 has been declared separately and assigned to a data type corresponding value in the loop. The variable num2 has been declared and assigned in the same line of code. The variable num3, on the other hand, has directly been assigned a value without its declaration. This causes the error, as shown above.
Other details
There may be errors arising even after proper declaration and assignment of the variable. This may be due to incorrect or absence of the closing brackets, semicolons or improper declaration of functions. Ensure proper use of syntax when defining loops and functions. Every opening in curly brace must be accounted for and closed. Extra closing braces also cause errors. Alongside, semicolons hold their importance. A semicolon missed can cause the entire program to go haywire.
Library folder
Many times, variables call or use functions that require importing a few specific libraries.
In the example above, the variable num calls the square root function – sqrt() from the maths library of Arduino. If we call a function without including its library first, an error occurs. There are multiple inbuilt and standard libraries in Arduino, while a few special libraries must be included separately.
Also read: What is ‘does not name a type’ in Arduino: 2 Fixes.