connectMultiWifi not declared in this scope...

[tpalaz]

Good afternoon.

Please check the below log to see full error. None of the examples in this library work.

Removing the "connectMultiWifi" function does indeed fix the error and allows compile but it breaks the program as the WiFi hangs and does not connect.

erbose mode can be enabled via -v, --verbose option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif8266/esp12e.html
PLATFORM: Espressif 8266 (2.6.2) > Espressif ESP8266 ESP-12E
HARDWARE: ESP8266 80MHz, 80KB RAM, 4MB Flash
PACKAGES:
 - framework-arduinoespressif8266 3.20704.0 (2.7.4)
 - tool-esptool 1.413.0 (4.13)
 - tool-esptoolpy 1.20800.0 (2.8.0)
 - toolchain-xtensa 2.40802.200502 (4.8.2)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 35 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <ESP Async WebServer> 1.2.3
|   |-- <ESPAsyncTCP> 1.2.2
|   |   |-- <ESP8266WiFi> 1.0
|   |-- <Hash> 1.0
|   |-- <ESP8266WiFi> 1.0
|-- <ESPAsyncTCP> 1.2.2
|   |-- <ESP8266WiFi> 1.0
|-- <ESPAsyncTCP-esphome> 1.2.3
|   |-- <ESP8266WiFi> 1.0
|-- <ESPAsyncWebServer-esphome> 1.2.7
|   |-- <ESPAsyncTCP-esphome> 1.2.3
|   |   |-- <ESP8266WiFi> 1.0
|   |-- <Hash> 1.0
|   |-- <ESPAsyncTCP> 1.2.2
|   |   |-- <ESP8266WiFi> 1.0
|   |-- <ESP8266WiFi> 1.0
|-- <ESP_WifiManager> 1.1.1
|   |-- <DNSServer> 1.1.1
|   |   |-- <ESP8266WiFi> 1.0
|   |-- <ESP8266WiFi> 1.0
|-- <ESPAsync_WifiManager> 1.1.1
|   |-- <DNSServer> 1.1.1
|   |   |-- <ESP8266WiFi> 1.0
|   |-- <ESP8266WiFi> 1.0
|   |-- <ESP Async WebServer> 1.2.3
|   |   |-- <ESPAsyncTCP> 1.2.2
|   |   |   |-- <ESP8266WiFi> 1.0
|   |   |-- <Hash> 1.0
|   |   |-- <ESP8266WiFi> 1.0
|-- <DNSServer> 1.1.1
|   |-- <ESP8266WiFi> 1.0
|-- <ESP8266mDNS> 1.2
|   |-- <ESP8266WiFi> 1.0
|-- <ESP8266WiFi> 1.0
|-- <LittleFS(esp8266)> 0.1.0
Building in release mode
Compiling .pio\build\esp12e\src\main.cpp.o
src\main.cpp:182:4: warning: #warning Using static IP [-Wcpp]
   #warning Using static IP
    ^
In file included from .pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager.h:592:0,
                 from src\main.cpp:199:
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h:992:3: warning: multi-line comment [-Wcomment]
   // Add option if didn't input/update SSID/PW => Use the previous saved Credentials. \
   ^
In file included from src\main.cpp:82:0:
.pio\libdeps\esp12e\ESPAsyncWebServer-esphome\src/SPIFFSEditor.h:16:101: warning: 'SPIFFS' is deprecated (declared at C:\Users\Tyler\.platformio\packages\framework-arduinoespressif8266\cores\esp8266/FS.h:269): SPIFFS has been deprecated. Please consider moving to LittleFS or other filesystems. [-Wdeprecated-declarations]
     SPIFFSEditor(const String& username=String(), const String& password=String(), const fs::FS& fs=SPIFFS);
                                                                                                     ^
In file included from .pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager.h:592:0,
                 from src\main.cpp:199:
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h: In member function 'void ESPAsync_WiFiManager::scan()':
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h:557:16: warning: unused variable 'res' [-Wunused-variable]
           bool res=WiFi.getNetworkInfo(i, wifiSSIDs[i].SSID, wifiSSIDs[i].encryptionType, wifiSSIDs[i].RSSI, wifiSSIDs[i].BSSID, wifiSSIDs[i].channel, wifiSSIDs[i].isHidden);
                ^
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h: In member function 'void ESPAsync_WiFiManager::criticalLoop()':
src\main.cpp:48:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define TIME_BETWEEN_MODELESS_SCANS       30000
                                           ^
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h:668:47: note: in expansion of macro 'TIME_BETWEEN_MODELESS_SCANS'
     if (scannow == -1 || millis() > scannow + TIME_BETWEEN_MODELESS_SCANS)
                                               ^
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h: In member function 'boolean ESPAsync_WiFiManager::startConfigPortal(const char*, const char*)':
src\main.cpp:45:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define TIME_BETWEEN_MODAL_SCANS          20000
                                           ^
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h:798:48: note: in expansion of macro 'TIME_BETWEEN_MODAL_SCANS'
     if ( scannow == -1 || millis() > scannow + TIME_BETWEEN_MODAL_SCANS)
                                                ^
In file included from .pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager.h:592:0,
                 from src\main.cpp:199:
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h: In member function 'boolean ESPAsync_WiFiManager::isIp(String)':
.pio\libdeps\esp12e\ESPAsync_WifiManager\src/ESPAsync_WiFiManager-Impl.h:2164:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < str.length(); i++)
                                  ^
src\main.cpp: In function 'void check_WiFi()':
src\main.cpp:267:22: error: 'connectMultiWiFi' was not declared in this scope
     connectMultiWiFi();
                      ^
*** [.pio\build\esp12e\src\main.cpp.o] Error 1  

[khoih-prog]

This issue was mentioned and closed in

Compile Error on Platformio

It's platform/compiler-settings dependent and you can solve by adding the forward declaration as follows:

...
String separatorLine = "===============================================================";

uint8_t connectMultiWiFi(void);

//format bytes
String formatBytes(size_t bytes) 
...

Will update the examples soon to change.

[khoih-prog]

Hi @tpalaz

Just let you know the new ESPAsync_WiFiManager release v1.1.2 already fixes the issue as well as some bugs in examples.