Closed
Description
Board
ESP Dev Module
Device Description
Module on breadboard.
Hardware Configuration
Software problem.
There is no hardware as the problem is in the software.
Version
v3.1.0
IDE Name
VSCode PlatformIO
Operating System
Windows 11 Pro 23H2 - Compilation 22631.4037
Flash frequency
80MHz
PSRAM enabled
no
Upload speed
921600
Description
When using PlatformIO with the following platformio.ini file:
[env:esp32dev]
platform = espressif32@ 6.9.0
board = esp32dev
framework = arduino
lib_deps =
arduino-libraries/Ethernet@^2.0.2
And running the WebServer example, several compilation errors occur.
Sketch
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino WIZnet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#include <Arduino.h>
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 177);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// You can use Ethernet.init(pin) to configure the CS pin
//Ethernet.init(10); // Most Arduino shields
Ethernet.init(5); // MKR ETH Shield
//Ethernet.init(0); // Teensy 2.0
//Ethernet.init(20); // Teensy++ 2.0
//Ethernet.init(15); // ESP8266 with Adafruit FeatherWing Ethernet
//Ethernet.init(33); // ESP32 with Adafruit FeatherWing Ethernet
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer Example");
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an HTTP request ends with a blank line
bool currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the HTTP request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard HTTP response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
int sensorReading = analogRead(analogChannel);
client.print("analog input ");
client.print(analogChannel);
client.print(" is ");
client.print(sensorReading);
client.println("<br />");
}
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}Debug Message
src/main.cpp: In function 'void loop()':
src/main.cpp:75:43: error: cannot allocate an object of abstract type 'EthernetClient'
75 | EthernetClient client = server.available();
| ~~~~~~~~~~~~~~~~^~
In file included from src/main.cpp:22:
.pio/libdeps/esp32dev/Ethernet/src/Ethernet.h:214:7: note: because the following virtual functions are pure within 'EthernetClient':
214 | class EthernetClient : public Client {
| ^~~~~~~~~~~~~~
In file included from C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Arduino.h:197,
from src/main.cpp:20:
C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Client.h:29:15: note: 'virtual int Client::connect(IPAddress, uint16_t, int32_t)'
29 | virtual int connect(IPAddress ip, uint16_t port, int32_t timeout) = 0;
| ^~~~~~~
C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Client.h:31:15: note: 'virtual int Client::connect(const char*, uint16_t, int32_t)'
31 | virtual int connect(const char *host, uint16_t port, int32_t timeout) = 0;
| ^~~~~~~
src/main.cpp:75:18: error: cannot declare variable 'client' to be of abstract type 'EthernetClient'
75 | EthernetClient client = server.available();
| ^~~~~~
Compiling .pio\build\esp32dev\FrameworkArduino\FunctionalInterrupt.cpp.o
*** [.pio\build\esp32dev\src\main.cpp.o] Error 1
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:40:16: error: invalid abstract return type for member function 'EthernetClient EthernetServer::available()'
40 | EthernetClient EthernetServer::available()
| ^~~~~~~~~~~~~~
In file included from .pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:22:
.pio/libdeps/esp32dev/Ethernet/src/Ethernet.h:214:7: note: because the following virtual functions are pure within 'EthernetClient':
214 | class EthernetClient : public Client {
| ^~~~~~~~~~~~~~
In file included from C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Arduino.h:197,
from .pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:21:
C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Client.h:29:15: note: 'virtual int Client::connect(IPAddress, uint16_t, int32_t)'
29 | virtual int connect(IPAddress ip, uint16_t port, int32_t timeout) = 0;
| ^~~~~~~
C:/Users/MichelGalvao/.platformio/packages/framework-arduinoespressif32@src-e5a7fd5d9117bd8a322277fde59ac3d3/cores/esp32/Client.h:31:15: note: 'virtual int Client::connect(const char*, uint16_t, int32_t)'
31 | virtual int connect(const char *host, uint16_t port, int32_t timeout) = 0;
| ^~~~~~~
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp: In member function 'EthernetClient EthernetServer::available()':
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:47:54: error: invalid cast to abstract class type 'EthernetClient'
47 | if (!chip) return EthernetClient(MAX_SOCK_NUM);
| ^
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:72:40: error: invalid cast to abstract class type 'EthernetClient'
72 | return EthernetClient(sockindex);
| ^
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp: At global scope:
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:75:16: error: invalid abstract return type for member function 'EthernetClient EthernetServer::accept()'
75 | EthernetClient EthernetServer::accept()
| ^~~~~~~~~~~~~~
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp: In member function 'EthernetClient EthernetServer::accept()':
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:82:54: error: invalid cast to abstract class type 'EthernetClient'
82 | if (!chip) return EthernetClient(MAX_SOCK_NUM);
| ^
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:104:40: error: invalid cast to abstract class type 'EthernetClient'
104 | return EthernetClient(sockindex);
| ^
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp: In member function 'virtual size_t EthernetServer::write(const uint8_t*, size_t)':
.pio/libdeps/esp32dev/Ethernet/src/EthernetServer.cpp:170:18: error: cannot allocate an object of abstract type 'EthernetClient'
170 | available();
| ~~~~~~~~~^~
*** [.pio\build\esp32dev\libe72\Ethernet\EthernetServer.cpp.o] Error 1
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.