ADAfruit , io Adruino example "adafruitio_16servo example" will not compile without error.

[stephenvowell]

ADAfruit io Adruino example adafruitio_16servo example will not compile without error.
I am using Arduino 1.8.8 ide and have the latest libraries and correct usb cable. code is below

// Adafruit IO Servo Example
// Adafruit IO Servo Example
// Tutorial Link: https://learn.adafruit.com/adafruit-io-basics-servo
//
// Adafruit invests time and resources providing this open source code.
// Please support Adafruit and open source hardware by purchasing
// products from Adafruit!
//
// Written by Todd Treece for Adafruit Industries
// Copyright (c) 2016-2017 Adafruit Industries
// Licensed under the MIT license.
//
// All text above must be included in any redistribution.

/************************** Configuration ***********************************/

// edit the config.h tab and enter your Adafruit IO credentials
// and any additional configuration needed for WiFi, cellular,
// or ethernet clients.
#include "config.h"

/************************ Example Starts Here *******************************/

#if defined(ARDUINO_ARCH_ESP32)
// ESP32Servo Library (https://github.com/madhephaestus/ESP32Servo)
// installation: library manager -> search -> "ESP32Servo"
#include <ESP32Servo.h>
#else
#include <Servo.h>
#endif

// pin used to control the servo
#define SERVO_PIN 2

// create an instance of the servo class
Servo servo;

// set up the 'servo' feed
AdafruitIO_Feed *servo_feed = io.feed("servo");

void setup() {

// start the serial connection
Serial.begin(115200);

// wait for serial monitor to open
while(! Serial);

// tell the servo class which pin we are using
servo.attach(SERVO_PIN);

// connect to io.adafruit.com
Serial.print("Connecting to Adafruit IO");
io.connect();

// set up a message handler for the 'servo' feed.
// the handleMessage function (defined below)
// will be called whenever a message is
// received from adafruit io.
servo_feed->onMessage(handleMessage);

// wait for a connection
while(io.status() < AIO_CONNECTED) {
Serial.print(".");
delay(500);
}

// we are connected
Serial.println();
Serial.println(io.statusText());
servo_feed->get();

}

void loop() {

// io.run(); is required for all sketches.
// it should always be present at the top of your loop
// function. it keeps the client connected to
// io.adafruit.com, and processes any incoming data.
io.run();

}

// this function is called whenever a 'servo' message
// is received from Adafruit IO. it was attached to
// the servo feed in the setup() function above.
void handleMessage(AdafruitIO_Data *data) {

// convert the data to integer
int angle = data->toInt();

// make sure we don't exceed the limit
// of the servo. the range is from 0
// to 180.
if(angle < 0)
angle = 0;
else if(angle > 180)
angle = 180;

servo.write(angle);

}

Compile error message below

Arduino: 1.8.8 (Mac OS X), Board: "Adafruit Feather HUZZAH ESP8266, 80 MHz, Flash, Disabled, 4M (no SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

/Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.cpp: In constructor 'AdafruitIO_ESP8266::AdafruitIO_ESP8266(const char*, const char*, const char*, const char*)':
/Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.cpp:22:53: error: cannot allocate an object of abstract type 'HttpClient'
_http = new HttpClient(*_client, _host, _http_port);
^
In file included from /Users/stephenvowell/Documents/Arduino/libraries/ArduinoHttpClient/src/ArduinoHttpClient.h:8:0,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/AdafruitIO.h:23,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.h:18,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.cpp:14:
/Users/stephenvowell/Documents/Arduino/libraries/ArduinoHttpClient/src/HttpClient.h:41:7: note: because the following virtual functions are pure within 'HttpClient':
class HttpClient : public Client
^
In file included from /Users/stephenvowell/Documents/Arduino/libraries/ArduinoHttpClient/src/HttpClient.h:10:0,
from /Users/stephenvowell/Documents/Arduino/libraries/ArduinoHttpClient/src/ArduinoHttpClient.h:8,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/AdafruitIO.h:23,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.h:18,
from /Users/stephenvowell/Documents/Arduino/libraries/Adafruit_IO_Arduino/src/wifi/AdafruitIO_ESP8266.cpp:14:
/Users/stephenvowell/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0/cores/esp8266/Client.h:29:21: note: virtual int Client::connect(const IPAddress&, uint16_t)
virtual int connect(CONST IPAddress& ip, uint16_t port) =0;
^
/Users/stephenvowell/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0/cores/esp8266/Client.h:37:22: note: virtual bool Client::flush(unsigned int)
virtual bool flush(unsigned int maxWaitMs = 0) = 0;
^
/Users/stephenvowell/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0/cores/esp8266/Client.h:38:22: note: virtual bool Client::stop(unsigned int)
virtual bool stop(unsigned int maxWaitMs = 0) = 0;
^
Multiple libraries were found for "Servo.h"
Used: /Users/stephenvowell/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0/libraries/Servo
Not used: /Applications/Arduino.app/Contents/Java/libraries/Servo
exit status 1
Error compiling for board Adafruit Feather HUZZAH ESP8266.

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[Jvejvad]

Hi.

I have similar problem.

using IDE 1.8.9
and compiling to a ESP8266.

• code has been running earlier, but will not compile at the moment.

Arduino: 1.8.9 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Disabled, ck, 26 MHz, 40MHz, DIO, 512K (no SPIFFS), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"

C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.cpp: In constructor 'AdafruitIO_ESP8266::AdafruitIO_ESP8266(const char*, const char*, const char*, const char*)':

C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.cpp:22:53: error: cannot allocate an object of abstract type 'HttpClient'

_http = new HttpClient(*_client, _host, _http_port);

                                                 ^

In file included from C:\Users\20438\OneDrive\Arduino\libraries\ArduinoHttpClient\src/ArduinoHttpClient.h:8:0,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src/AdafruitIO.h:23,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.h:18,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.cpp:14:

C:\Users\20438\OneDrive\Arduino\libraries\ArduinoHttpClient\src/HttpClient.h:41:7: note: because the following virtual functions are pure within 'HttpClient':

class HttpClient : public Client

   ^

In file included from C:\Users\20438\OneDrive\Arduino\libraries\ArduinoHttpClient\src/HttpClient.h:10:0,

             from C:\Users\20438\OneDrive\Arduino\libraries\ArduinoHttpClient\src/ArduinoHttpClient.h:8,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src/AdafruitIO.h:23,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.h:18,

             from C:\Users\20438\OneDrive\Arduino\libraries\Adafruit_IO_Arduino\src\wifi\AdafruitIO_ESP8266.cpp:14:

C:\Users\20438\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/Client.h:29:21: note: virtual int Client::connect(const IPAddress&, uint16_t)

     virtual int connect(CONST IPAddress& ip, uint16_t port) =0;

                 ^

C:\Users\20438\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/Client.h:37:22: note: virtual bool Client::flush(unsigned int)

     virtual bool flush(unsigned int maxWaitMs = 0) = 0;

                  ^

C:\Users\20438\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.0\cores\esp8266/Client.h:38:22: note: virtual bool Client::stop(unsigned int)

     virtual bool stop(unsigned int maxWaitMs = 0) = 0;

                  ^

exit status 1
Error compiling for board Generic ESP8266 Module.

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

[Jvejvad]

try this !
ESP8266 board manager v. 2.5.0 seems to be causing this - switch back to before the beta editions.

https://forums.adafruit.com/viewtopic.php?f=8&t=145524

v. 2.4.2 solved my problems and all my old code is now running.