Compiler conflicts when using AsyncWebServer_RP2040W.h

1

I would like to use AsyncWebServer_RP2040W for a RP pico W web server application. The code works well in the below example. However, I need to include the <HTTPClient.h> library in my code. Unfortunately, just adding the #include command produces error messages.

Is there a way to resolve the incompatibility?

Any thoughts would be appreciated.

Here is the example code, which I have taken from GitHub - khoih-prog/AsyncWebServer_RP2040W: Asynchronous WebServer Library for RASPBERRY_PI_PICO_W using CYW43439 WiFi with arduino-pico core. This library, which is relied on AsyncTCP_RP2040W, is part of a series of advanced Async libraries for RP2040W, such as AsyncTCP_RP2040W, AsyncUDP_RP2040W, AsyncWebServer_RP2040W, AsyncHTTPRequest_RP2040W, AsyncHTTPSRequest_RP2040W, etc. Now can display programmed WiFi country-code and support using CString to save heap to send very large data

/****************************************************************************************************************************
  Async_HelloServer.h

  For RP2040W with CYW43439 WiFi

  AsyncWebServer_RP2040W is a library for the RP2040W with CYW43439 WiFi

  Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
  Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_RP2040W
  Licensed under GPLv3 license
 *****************************************************************************************************************************/

#include <Arduino.h>
#include <WiFi.h>

#include "pico/cyw43_arch.h"
#include <AsyncWebServer_RP2040W.h>

//#include <HTTPClient.h>

///////////////////////////////////////////////////////////////////

char ssid[] = "ssid";        // your network SSID (name)
char pass[] = "12345678";         // your network password (use for WPA, or use as key for WEP), length must be 8+

int status = WL_IDLE_STATUS;

AsyncWebServer    server(80);

#define LED_OFF             LOW
#define LED_ON              HIGH

#define BUFFER_SIZE         64
char temp[BUFFER_SIZE];

void handleRoot(AsyncWebServerRequest *request)
{
	digitalWrite(LED_BUILTIN, LED_ON);

	snprintf(temp, BUFFER_SIZE - 1, "Hello from Async_HelloServer --- on %s\n", BOARD_NAME);

	request->send(200, "text/plain", temp);

	digitalWrite(LED_BUILTIN, LED_OFF);
}

void handleNotFound(AsyncWebServerRequest *request)
{
	digitalWrite(LED_BUILTIN, LED_ON);

	String message = "File Not Found\n\n";

	message += "URI: ";
	//message += server.uri();
	message += request->url();
	message += "\nMethod: ";
	message += (request->method() == HTTP_GET) ? "GET" : "POST";
	message += "\nArguments: ";
	message += request->args();
	message += "\n";

	for (uint8_t i = 0; i < request->args(); i++)
	{
		message += " " + request->argName(i) + ": " + request->arg(i) + "\n";
	}

	request->send(404, "text/plain", message);
	digitalWrite(LED_BUILTIN, LED_OFF);
}

void printWifiStatus()
{
	// print the SSID of the network you're attached to:
	Serial.print("SSID: ");
	Serial.println(WiFi.SSID());

	// print your board's IP address:
	IPAddress ip = WiFi.localIP();
	Serial.print("Local IP Address: ");
	Serial.println(ip);

	// print your board's country code
	// #define CYW43_COUNTRY(A, B, REV) ((unsigned char)(A) | ((unsigned char)(B) << 8) | ((REV) << 16))
	uint32_t myCountryCode = cyw43_arch_get_country_code();
	char countryCode[3] = { 0, 0, 0 };

	countryCode[0] = myCountryCode & 0xFF;
	countryCode[1] = (myCountryCode >> 8) & 0xFF;

	Serial.print("Country code: ");
	Serial.println(countryCode);
}

void setup()
{
	pinMode(LED_BUILTIN, OUTPUT);
	digitalWrite(LED_BUILTIN, LED_OFF);

	Serial.begin(115200);

	while (!Serial && millis() < 5000);

	delay(200);

	Serial.print("\nStart Async_HelloServer on ");
	Serial.print(BOARD_NAME);
	Serial.print(" with ");
	Serial.println(SHIELD_TYPE);
	Serial.println(ASYNCTCP_RP2040W_VERSION);
	Serial.println(ASYNC_WEBSERVER_RP2040W_VERSION);

	///////////////////////////////////

	// check for the WiFi module:
	if (WiFi.status() == WL_NO_MODULE)
	{
		Serial.println("Communication with WiFi module failed!");

		// don't continue
		while (true);
	}

	Serial.print(F("Connecting to SSID: "));
	Serial.println(ssid);

	WiFi.mode(WIFI_STA);
	status = WiFi.begin(ssid, pass);

	delay(1000);

	// attempt to connect to WiFi network
	while ( status != WL_CONNECTED)
	{
		delay(500);

		// Connect to WPA/WPA2 network
		status = WiFi.status();
	}

	printWifiStatus();

	///////////////////////////////////

	server.on("/", HTTP_GET, [](AsyncWebServerRequest * request)
	{
		handleRoot(request);
	});

	server.on("/inline", [](AsyncWebServerRequest * request)
	{
		request->send(200, "text/plain", "This works as well");
	});

	server.onNotFound(handleNotFound);

	server.begin();

	Serial.print(F("HTTP EthernetWebServer is @ IP : "));
	Serial.println(WiFi.localIP());
}

void heartBeatPrint()
{
	static int num = 1;

	Serial.print(F("."));

	if (num == 80)
	{
		Serial.println();
		num = 1;
	}
	else if (num++ % 10 == 0)
	{
		Serial.print(F(" "));
	}
}

void check_status()
{
	static unsigned long checkstatus_timeout = 0;

#define STATUS_CHECK_INTERVAL     10000L

	// Send status report every STATUS_REPORT_INTERVAL (60) seconds: we don't need to send updates frequently if there is no status change.
	if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
	{
		heartBeatPrint();
		checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
	}
}

void loop()
{
	check_status();
}

Here is my platformio.ini file:


[env]
platform = raspberrypi
framework = arduino
board_build.core = earlephilhower
monitor_speed = 115200

[env:rpipicow]
board = rpipicow

lib_deps = 
	khoih-prog/AsyncTCP_RP2040W@>=1.1.0
	khoih-prog/AsyncMQTT_Generic@>=1.8.1
	stm32duino/STM32duino LwIP@>=2.1.2

when I un-comment the line "#include <HTMLClient.h>, I get this error message:

Processing rpipicow (board: rpipicow; platform: raspberrypi; framework: arduino)
---------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/raspberrypi/rpipicow.html
PLATFORM: Raspberry Pi RP2040 (1.14.0+sha.196d31b) > Pico W
HARDWARE: RP2040 133MHz, 264KB RAM, 2MB Flash
DEBUG: Current (blackmagic) External (blackmagic, cmsis-dap, jlink, pico-debug, picoprobe, raspberrypi-swd)
PACKAGES: 
 - framework-arduinopico @ 1.30903.0+sha.96a2e92 
 - tool-rp2040tools @ 1.0.2 
 - toolchain-rp2040-earlephilhower @ 5.120300.240127 (12.3.0)
Flash size: 2.00MB
Sketch size: 2.00MB
Filesystem size: 0.00MB
Maximium Sketch size: 2093056 EEPROM start: 0x101ff000 Filesystem start: 0x101ff000 Filesystem end: 0x101ff000
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 66 compatible libraries
Scanning dependencies...
Dependency Graph
|-- AsyncTCP_RP2040W @ 1.2.0
|-- AsyncMQTT_Generic @ 1.8.1
|-- STM32duino LwIP @ 2.1.3
|-- AsyncWebServer_RP2040W @ 1.5.0
|-- HTTPClient @ 1.2
|-- WiFi @ 1.0.0
Building in release mode
Compiling .pio/build/rpipicow/src/main.cpp.o
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/arch.h:48,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/debug.h:40,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:52,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/init.h:40,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/IPAddress.h:26,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/ArduinoAPI.h:30,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/ArduinoAPI.h:2,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/Arduino.h:28,
                 from src/main.cpp:15:
.pio/libdeps/rpipicow/STM32duino LwIP/src/arch/cc.h:86: warning: "LWIP_RAND" redefined
   86 | #define LWIP_RAND() ((u32_t)rand())
      | 
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:51:
/Users/ludwin/.platformio/packages/framework-arduinopico/include/lwipopts.h:15: note: this is the location of the previous definition
   15 | #define LWIP_RAND() __lwip_rand()
      | 
Compiling .pio/build/rpipicow/lib582/HTTPClient/HTTPClient.cpp.o
Compiling .pio/build/rpipicow/lib582/HTTPClient/base64.cpp.o
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/arch.h:48,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/debug.h:40,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:52,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/init.h:40,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/IPAddress.h:26,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/ArduinoAPI.h:30,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/ArduinoAPI.h:2,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/Arduino.h:28,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/libraries/HTTPClient/src/HTTPClient.cpp:26:
.pio/libdeps/rpipicow/STM32duino LwIP/src/arch/cc.h:86: warning: "LWIP_RAND" redefined
   86 | #define LWIP_RAND() ((u32_t)rand())
      | 
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:51:
/Users/ludwin/.platformio/packages/framework-arduinopico/include/lwipopts.h:15: note: this is the location of the previous definition
   15 | #define LWIP_RAND() __lwip_rand()
      | 
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/arch.h:48,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/debug.h:40,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:52,
                 from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/init.h:40,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/IPAddress.h:26,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/../../../ArduinoCore-API/api/ArduinoAPI.h:30,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/api/ArduinoAPI.h:2,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/cores/rp2040/Arduino.h:28,
                 from /Users/ludwin/.platformio/packages/framework-arduinopico/libraries/HTTPClient/src/base64.cpp:25:
.pio/libdeps/rpipicow/STM32duino LwIP/src/arch/cc.h:86: warning: "LWIP_RAND" redefined
   86 | #define LWIP_RAND() ((u32_t)rand())
      | 
In file included from .pio/libdeps/rpipicow/STM32duino LwIP/src/lwip/opt.h:51:
/Users/ludwin/.platformio/packages/framework-arduinopico/include/lwipopts.h:15: note: this is the location of the previous definition
   15 | #define LWIP_RAND() __lwip_rand()
      | 
/Users/ludwin/.platformio/packages/framework-arduinopico/libraries/HTTPClient/src/base64.cpp: In static member function 'static arduino::String base64::encode(const uint8_t*, size_t, bool)':
/Users/ludwin/.platformio/packages/framework-arduinopico/libraries/HTTPClient/src/base64.cpp:42:23: error: 'base64_encode_expected_len_nonewlines' was not declared in this scope; did you mean 'base64_encode_expected_len'?
   42 |                     : base64_encode_expected_len_nonewlines(length)) + 1);
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       base64_encode_expected_len
/Users/ludwin/.platformio/packages/framework-arduinopico/libraries/HTTPClient/src/base64.cpp:50:13: error: 'base64_init_encodestate_nonewlines' was not declared in this scope; did you mean 'base64_init_encodestate'?
   50 |             base64_init_encodestate_nonewlines(&_state);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |             base64_init_encodestate
*** [.pio/build/rpipicow/lib582/HTTPClient/base64.cpp.o] Error 1
======================================================== [FAILED] Took 2.78 seconds ========================================================
2

lib_ignore that. Can’t possibly be right to be included for RP2040.

Also I don’t have high hopes for an archived library that was last updated 1 year ago to work with the latest Arduino-Pico core, but I could be wrong too.

3

thank you, Max. I agree.

I give up on AsyncWebServer_RP2040 and use <WebServer.h> instead.

4

I had this error in my project and managed to solve it.

Why does this error occur?
This error occurs because the Compiler obtains two cencode libraries (One included with the @khoih-prog library and the other from the Arduino RP2040 core).

How ​​can I fix it?
Just delete the cencode.c and cencode.h files that are inside the libb64 folder, which in turn is inside the AsyncWebServer_RP2040W library folder. See the image below (in the image is the EthernetWebServer library [which gave an error in my project], but deleting the library files should also work for AsyncWebServer_RP2040W):

image
image392×722 16.3 KB

[BONUS]
But when using this EthernetWebServer library will I always have to perform these tedious steps?
No! I found out that @maxgerhardt (Maximilian Gerhardt) made a fork of the EthernetWebServer library that fixes this problem (Thanks Max👍). Here is the link to the fork: github.com/maxgerhardt/EthernetWebServer And to use it within PlatformIO, just do this in platformio.ini:

lib_deps = 
    https://github.com/maxgerhardt/EthernetWebServer.git