I'm getting an error while verifying the code

ritosankho · March 7, 2024, 11:40am

Hi. I downloaded this code from the internet and it is for the ESP8266 NodeMCU board. It creates an access point and controls the L238N motor driver from a phone. But when I try to compile it, I am getting a long error.
Here's the code:

#include <PageStream.h>
#include <PageBuilder.h>

#include <IoTtweet.h>

#include <ESP8266wifi.h>

#define ENA   14          // Enable/speed motors Right        GPIO14(D5)
#define ENB   12          // Enable/speed motors Left         GPIO12(D6)
#define IN_1  15          // L298N in1 motors Right           GPIO15(D8)
#define IN_2  13          // L298N in2 motors Right           GPIO13(D7)
#define IN_3  2           // L298N in3 motors Left            GPIO2(D4)
#define IN_4  0           // L298N in4 motors Left            GPIO0(D3)


#include <WiFiClient.h> 
#include <ESP8266WebServer.h>

String command;             //String to store app command state.
int speedCar = 800;         // 400 - 1023.
int speed_Coeff = 3;

const char* ssid = "NodeMCU Car";
ESP8266WebServer server(80);

void setup() {
 
 pinMode(ENA, OUTPUT);
 pinMode(ENB, OUTPUT);  
 pinMode(IN_1, OUTPUT);
 pinMode(IN_2, OUTPUT);
 pinMode(IN_3, OUTPUT);
 pinMode(IN_4, OUTPUT); 
  
  Serial.begin(115200);
  
// Connecting WiFi

  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid);

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);
 
 // Starting WEB-server 
     server.on ( "/", HTTP_handleRoot );
     server.onNotFound ( HTTP_handleRoot );
     server.begin();    
}

void goAhead(){ 

      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
  }

and here's the error ;

Arduino: 1.8.19 (Linux), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM (balanced), Use pgm_read macros for IRAM/PROGMEM, 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"











/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp: In member function 'String IoTtweet::WriteDashboard(const char*, const char*, float, float, float, float, String, String)':
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp:82:16: error: control reaches end of non-void function [-Werror=return-type]
   82 |     WiFiClient client;
      |                ^~~~~~
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp: In member function 'String IoTtweet::ReadControlPanel(const char*, const char*)':
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp:127:14: error: control reaches end of non-void function [-Werror=return-type]
  127 |   WiFiClient client;
      |              ^~~~~~
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp: In member function 'String IoTtweet::ReadDigitalSwitch(const char*, const char*, uint8_t)':
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp:216:14: error: control reaches end of non-void function [-Werror=return-type]
  216 |   WiFiClient client;
      |              ^~~~~~
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp: In member function 'float IoTtweet::ReadAnalogSlider(const char*, const char*, uint8_t)':
/home/rito/Arduino/libraries/IoTtweet/src/IoTtweet.cpp:286:14: error: control reaches end of non-void function [-Werror=return-type]
  286 |   WiFiClient client;
      |              ^~~~~~
cc1plus: some warnings being treated as errors
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

What can be the possible cause and fix?
Thanks in advance.

AresXT · March 7, 2024, 11:48am

Can you share your full code

ec2021 · March 7, 2024, 12:04pm

Hi @ritosankho ,

the reason for the error messages seems to be that the compiler reaches the end of functions which should return a value or string without noticing a "return something;".

Just search the internet for

error: control reaches end of non-void function

You may try to change the sequence of the #includes:

#include <PageStream.h>
#include <PageBuilder.h>

// Include Wifi before IoTweet  

#include <ESP8266wifi.h>
#include <IoTtweet.h>

ritosankho · March 7, 2024, 12:31pm

I am pasting the full code but on the final post only first part is showing.

AresXT · March 7, 2024, 12:34pm

Could you try again? Maybe upload on something share the link looks like code little bit lengthy

ritosankho · March 7, 2024, 12:34pm

I did that and now it is giving me a different error.

Arduino: 1.8.19 (Linux), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM (balanced), Use pgm_read macros for IRAM/PROGMEM, 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"











/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:14:57: error: 'const char OK []' redeclared as different kind of entity
   14 | #define PROGMEM __attribute__((section(".progmem.data")))
      |                                                         ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:17:17: note: in expansion of macro 'PROGMEM'
   17 | const char OK[] PROGMEM = "OK";
      |                 ^~~~~~~
In file included from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/esp8266_peri.h:27,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:39,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/tools/sdk/include/c_types.h:71:5: note: previous declaration 'STATUS OK'
   71 |     OK = 0,
      |     ^~
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:14:57: error: 'const char FAIL []' redeclared as different kind of entity
   14 | #define PROGMEM __attribute__((section(".progmem.data")))
      |                                                         ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:18:19: note: in expansion of macro 'PROGMEM'
   18 | const char FAIL[] PROGMEM = "FAIL";
      |                   ^~~~~~~
In file included from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/esp8266_peri.h:27,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:39,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/tools/sdk/include/c_types.h:72:5: note: previous declaration 'STATUS FAIL'
   72 |     FAIL,
      |     ^~~~
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:14:57: error: 'const char BUSY []' redeclared as different kind of entity
   14 | #define PROGMEM __attribute__((section(".progmem.data")))
      |                                                         ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:25:19: note: in expansion of macro 'PROGMEM'
   25 | const char BUSY[] PROGMEM =  "busy";
      |                   ^~~~~~~
In file included from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/esp8266_peri.h:27,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:39,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/tools/sdk/include/c_types.h:74:5: note: previous declaration 'STATUS BUSY'
   74 |     BUSY,
      |     ^~~~
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::begin()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:150:27: error: cannot convert 'STATUS' to 'const char*'
  150 |     if (readCommand(1000, OK, NO_CHANGE) == 0)
      |                           ^~
      |                           |
      |                           STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:158:27: error: cannot convert 'STATUS' to 'const char*'
  158 |     if (readCommand(1000, OK, NO_CHANGE) == 0)
      |                           ^~
      |                           |
      |                           STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:163:39: error: cannot convert 'STATUS' to 'const char*'
  163 |     flags.started = readCommand(3000, OK, NO_CHANGE) > 0;
      |                                       ^~
      |                                       |
      |                                       STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::connectToAP()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:197:24: error: cannot convert 'STATUS' to 'const char*'
  197 |     readCommand(15000, OK, FAIL);
      |                        ^~
      |                        |
      |                        STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::isConnectedToAP()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:204:21: error: cannot convert 'STATUS' to 'const char*'
  204 |     readCommand(10, OK); //cleanup
      |                     ^~
      |                     |
      |                     STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'char* ESP8266wifi::getIP()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:215:25: error: cannot convert 'STATUS' to 'const char*'
  215 |         readCommand(10, OK, ERROR);
      |                         ^~
      |                         |
      |                         STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:218:23: error: cannot convert 'STATUS' to 'const char*'
  218 |     readCommand(1000, OK, ERROR);
      |                       ^~
      |                       |
      |                       STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'char* ESP8266wifi::getMAC()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:229:25: error: cannot convert 'STATUS' to 'const char*'
  229 |         readCommand(10, OK, ERROR);
      |                         ^~
      |                         |
      |                         STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:232:23: error: cannot convert 'STATUS' to 'const char*'
  232 |     readCommand(1000, OK, ERROR);
      |                       ^~
      |                       |
      |                       STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'void ESP8266wifi::disconnectFromServer()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:279:23: error: cannot convert 'STATUS' to 'const char*'
  279 |     readCommand(2000, OK); //fire and forget in this case..
      |                       ^~
      |                       |
      |                       STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::startLocalServer()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:320:51: error: cannot convert 'STATUS' to 'const char*'
  320 |     flags.localServerRunning = (readCommand(2000, OK, NO_CHANGE) > 0);
      |                                                   ^~
      |                                                   |
      |                                                   STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::startLocalAp()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:327:28: error: cannot convert 'STATUS' to 'const char*'
  327 |     if (!readCommand(2000, OK, NO_CHANGE))
      |                            ^~
      |                            |
      |                            STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:339:47: error: cannot convert 'STATUS' to 'const char*'
  339 |     flags.localApRunning = (readCommand(5000, OK, ERROR) == 1);
      |                                               ^~
      |                                               |
      |                                               STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::stopLocalServer()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:345:42: error: cannot convert 'STATUS' to 'const char*'
  345 |     boolean stopped = (readCommand(2000, OK, NO_CHANGE) > 0);
      |                                          ^~
      |                                          |
      |                                          STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::stopLocalAP()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:354:42: error: cannot convert 'STATUS' to 'const char*'
  354 |     boolean stopped = (readCommand(2000, OK, NO_CHANGE) > 0);
      |                                          ^~
      |                                          |
      |                                          STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'bool ESP8266wifi::send(char, const char*, bool)':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:418:54: error: cannot convert 'STATUS' to 'const char*'
  418 |         byte sendStatus = readCommand(5000, SEND_OK, BUSY);
      |                                                      ^~~~
      |                                                      |
      |                                                      STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:73: note:   initializing argument 3 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                                                         ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'WifiMessage ESP8266wifi::listenForIncomingMessage(int)':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:547:60: error: no matching function for call to 'min(byte&, unsigned int)'
  547 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/algorithm:62,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:229,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3479:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)'
 3479 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3479:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:547:60: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
  547 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/algorithm:62,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:229,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3473:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(std::initializer_list<_Tp>)'
 3473 |     min(initializer_list<_Tp> __l)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3473:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:547:60: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
  547 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/specfun.h:45,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/cmath:1927,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/math.h:36,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:34,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:278:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  278 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:278:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:547:60: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'unsigned int')
  547 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/specfun.h:45,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/cmath:1927,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/math.h:36,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:34,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:230:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  230 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:230:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:547:60: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'unsigned int')
  547 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:551:25: error: cannot convert 'STATUS' to 'const char*'
  551 |         readCommand(10, OK); // cleanup after rx
      |                         ^~
      |                         |
      |                         STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp: In member function 'WifiMessage ESP8266wifi::getIncomingMessage()':
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:584:60: error: no matching function for call to 'min(byte&, unsigned int)'
  584 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/algorithm:62,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:229,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3479:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)'
 3479 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3479:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:584:60: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
  584 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/algorithm:62,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:229,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3473:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(std::initializer_list<_Tp>)'
 3473 |     min(initializer_list<_Tp> __l)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algo.h:3473:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:584:60: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
  584 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/specfun.h:45,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/cmath:1927,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/math.h:36,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:34,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:278:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  278 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:278:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:584:60: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'unsigned int')
  584 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
In file included from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/specfun.h:45,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/cmath:1927,
                 from /home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/math.h:36,
                 from /home/rito/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/cores/esp8266/Arduino.h:34,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:17,
                 from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:230:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  230 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/home/rito/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.1.0-gcc10.3-e5f9fec/xtensa-lx106-elf/include/c++/10.3.0/bits/stl_algobase.h:230:5: note:   template argument deduction/substitution failed:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:584:60: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'unsigned int')
  584 |         readBuffer(&msgIn[0], min(length, sizeof(msgIn) - 1));
      |                                                            ^
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:588:25: error: cannot convert 'STATUS' to 'const char*'
  588 |         readCommand(10, OK); // cleanup after rx
      |                         ^~
      |                         |
      |                         STATUS
In file included from /home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.cpp:9:
/home/rito/Arduino/libraries/ESP8266wifi-master/ESP8266wifi.h:169:47: note:   initializing argument 2 of 'byte ESP8266wifi::readCommand(int, const char*, const char*)'
  169 |     byte readCommand(int timeout, const char* text1 = NULL, const char* text2 = NULL);
      |                                               ^
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

ritosankho · March 7, 2024, 12:35pm

#include <PageStream.h>
#include <PageBuilder.h>

#include <ESP8266wifi.h>
#include <IoTtweet.h>


#define ENA   14          // Enable/speed motors Right        GPIO14(D5)
#define ENB   12          // Enable/speed motors Left         GPIO12(D6)
#define IN_1  15          // L298N in1 motors Right           GPIO15(D8)
#define IN_2  13          // L298N in2 motors Right           GPIO13(D7)
#define IN_3  2           // L298N in3 motors Left            GPIO2(D4)
#define IN_4  0           // L298N in4 motors Left            GPIO0(D3)


#include <WiFiClient.h> 
#include <ESP8266WebServer.h>

String command;             //String to store app command state.
int speedCar = 800;         // 400 - 1023.
int speed_Coeff = 3;

const char* ssid = "NodeMCU Car";
ESP8266WebServer server(80);

void setup() {
 
 pinMode(ENA, OUTPUT);
 pinMode(ENB, OUTPUT);  
 pinMode(IN_1, OUTPUT);
 pinMode(IN_2, OUTPUT);
 pinMode(IN_3, OUTPUT);
 pinMode(IN_4, OUTPUT); 
  
  Serial.begin(115200);
  
// Connecting WiFi

  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid);

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);
 
 // Starting WEB-server 
     server.on ( "/", HTTP_handleRoot );
     server.onNotFound ( HTTP_handleRoot );
     server.begin();    
}

void goAhead(){ 

      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
  }

void goBack(){ 

      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goRight(){ 

      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
  }

void goLeft(){

      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goAheadRight(){
      
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar/speed_Coeff);
 
      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar);
   }

void goAheadLeft(){
      
      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, HIGH);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, HIGH);
      analogWrite(ENB, speedCar/speed_Coeff);
  }

void goBackRight(){ 

      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar/speed_Coeff);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
  }

void goBackLeft(){ 

      digitalWrite(IN_1, HIGH);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, HIGH);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar/speed_Coeff);
  }

void stopRobot(){  

      digitalWrite(IN_1, LOW);
      digitalWrite(IN_2, LOW);
      analogWrite(ENA, speedCar);

      digitalWrite(IN_3, LOW);
      digitalWrite(IN_4, LOW);
      analogWrite(ENB, speedCar);
 }

void loop() {
    server.handleClient();
    
      command = server.arg("State");
      if (command == "F") goAhead();
      else if (command == "B") goBack();
      else if (command == "L") goLeft();
      else if (command == "R") goRight();
      else if (command == "I") goAheadRight();
      else if (command == "G") goAheadLeft();
      else if (command == "J") goBackRight();
      else if (command == "H") goBackLeft();
      else if (command == "0") speedCar = 400;
      else if (command == "1") speedCar = 470;
      else if (command == "2") speedCar = 540;
      else if (command == "3") speedCar = 610;
      else if (command == "4") speedCar = 680;
      else if (command == "5") speedCar = 750;
      else if (command == "6") speedCar = 820;
      else if (command == "7") speedCar = 890;
      else if (command == "8") speedCar = 960;
      else if (command == "9") speedCar = 1023;
      else if (command == "S") stopRobot();
}

void HTTP_handleRoot(void) {

if( server.hasArg("State") ){
       Serial.println(server.arg("State"));
  }
  server.send ( 200, "text/html", "" );
  delay(1);
}

AresXT · March 7, 2024, 12:39pm

where did you find the code brother do you have the link

ritosankho · March 7, 2024, 12:42pm

Yes, here's the link

And here is the link to the youtube video that I was trying to follow.

AresXT · March 7, 2024, 12:46pm

The code you given in this doesnt have these header files and what is the use of them in here

#include <PageStream.h>
#include <PageBuilder.h>
#include <IoTtweet.h>

ec2021 · March 7, 2024, 2:25pm

There seem to be issues with PageBuilder lib and an older 8266 core, see here

https://github.com/Hieromon/PageBuilder/issues/7#issue-412255330

But as mentioned by @AresXT there might be no need for the three libs in your sketch.

What happens if you comment/remove the includes as listed in post #10?

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I'm getting an error while verifying the code

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