I wrote this code:
#include <Keyboard.h>
void setup() {
Keyboard.begin();
Keyboard.print("Hello!");
}
And Iam getting the error
C:\Users\nobody\sketch_feb12a\sketch_feb12a.ino: In function 'void setup()':
C:\Users\nobody\sketch_feb12a\sketch_feb12a.ino:4:3: error: 'Keyboard' was not declared in this scope
Keyboard.begin();
^~~~~~~~
exit status 1
Compilation error: 'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?
I tried installing Keyboard.h from a zip and from the Library manager.
What do I have to change?
If you're trying this on a board that supports emulating USB devices, such as the Teensy, then you need to select keyboard option for USB Type:
Tools > USB Type > Keyboard
This library does not work for the Arduino Uno or similar boards.
Have you use the board like Leonardo? If you try to compile code with keyboard for the board which doesn't support HID interface, you will get this error.
Related
While compiling my rather simple project I get an error that I'm unable to resolve. The included libraries are:
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>
And the error that HTTP_GET was not declared in this scope concerns the following line :
message += (server.method() == HTTP_GET) ? "GET" : "POST";
I'm using an ESP32 module produced by AZDelivery, the board is selected and other simple projects (like blinking the internal LED) word like a charm.
Any ideas how to solve this would be appreciated
EDIT: below is the full error message as thrown in Arduino IDE (on macos)
Users/yannickgery/Documents/Arduino/controlservo/controlservo.ino: In function 'void handleNotFound()':
controlservo:156:34: error: 'HTTP_GET' was not declared in this scope
message += (server.method() == HTTP_GET) ? "GET" : "POST";
^
/Users/yannickgery/Documents/Arduino/controlservo/controlservo.ino: In function 'void setup()':
controlservo:206:23: error: 'HTTP_GET' was not declared in this scope
server.on("/motor", HTTP_GET, motorControl);
^
Multiple libraries were found for "WiFi.h"
Used: /Users/yannickgery/Library/Arduino15/packages/esp32/hardware/esp32/1.0.4/libraries/WiFi
Not used: /Applications/Arduino.app/Contents/Java/libraries/WiFi
exit status 1
'HTTP_GET' was not declared in this scope
Assuming you're using the HTTP methods defined in this arduino-esp32 library then perhaps you have a very old version of it? Try including this file directly with #include "HTTP_Method.h", see if it surfaces #include errors (in which case you have a very old version) or fixes your problem (maybe you have several files of the same name in the include path?).
I am trying to get the NFC shield working using SPI communication.
I did follow all the instructions exactly as explained in
Seeed Wiki - NFC Shield Setup.
Here is the code I tried:
#include <SPI.h>
#include <PN532/PN532_SPI/PN532_SPI.h>
PN532_SPI pn532spi(SPI, 10);
NfcAdapter nfc = NfcAdapter(pn532spi);
void setup(void) {
Serial.begin(115200); // begin serial communication
Serial.println("NDEF Reader");
nfc.begin(); // begin NFC communication
}
void loop(void) {
Serial.println("\nScan an NFC tag\n");
if (nfc.tagPresent()) // Do an NFC scan to see if an NFC tag is present
{
NfcTag tag = nfc.read(); // read the NFC tag into an object, nfc.read() returns an NfcTag object.
tag.print(); // prints the NFC tags type, UID, and NDEF message (if available)
}
delay(500); // wait half a second (500ms) before scanning again (you may increment or decrement the wait time)
}
Here is the error I am getting.
ResolveLibrary(PN532/PN532/PN532Interface.h)
In file included from D:\Dropbox\Ardruino\Seed NFC Reader\Seeed\ReadTagWithSPI
\ReadTagWithSPI.ino:9:0:
-> candidates: []
C:\Program Files (x86)\Arduino\libraries\Seeed_Arduino_NFC-master
\src/PN532/PN532_I2C/PN532_I2C.h:9:10: fatal error: PN532/PN532/PN532Interface.h: No such file
or directory
#include "PN532/PN532/PN532Interface.h"
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
\libraries\SPI
Using library PN532_SPI in folder: C:\Program Files (x86)\Arduino\libraries\PN532_SPI (legacy)
Using library Seeed_Arduino_NFC-master at version 1.1.0 in folder: C:\Program Files
(x86)\Arduino\libraries\Seeed_Arduino_NFC-master
Using library Wire at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino
\avr\libraries\Wire
exit status 1
Error compiling for board Arduino Uno.
If you are using ArduinoIDE use Sketch -> Manage Libraries ->Library Manager
Enter PN532 in the search field and install the lib Adafruit PN532 from there.
This ensures its placed in the right directory. Probably your libs are in a different thanin the Afafruit example.
After a long time I tried to get back in Arduino Programming. But with my old code I get the following error:
fatal error: avr/eeprom.h: No such file or directory
#include <avr/eeprom.h>
^
compilation terminated.
exit status 1
So why doesn't he find the avr library. Do I need to install it manually? And where can I find a download of it?
The <avr/eeprom.h> is available only for the AVR architecture. It's not possible to use it on other MCU architectures.
And ESP8266 is definitely completely different MCU architecture.
Im Using latest arduino nightly build v 1.6.10 to compile sample program for Arduino Pro Micro Which uses ATmega32U4. I just downloaded FreeRtos Library from Library Manager. Using very simple empty sketch to compile using #include
but im getting following errror while compiling:
C:\Users\Rajendra\Documents\Arduino\libraries\FreeRTOS\src\variantHooks.c: In function 'initVariant':
C:\Users\Rajendra\Documents\Arduino\libraries\FreeRTOS\src\variantHooks.c:88:2: error: 'USBDevice' undeclared (first use in this function)
USBDevice.attach();
^
C:\Users\Rajendra\Documents\Arduino\libraries\FreeRTOS\src\variantHooks.c:88:2: note: each undeclared identifier is reported only once for each function it appears in
exit status 1
Error compiling for board SparkFun Pro Micro.
what is the possibility for getting this error?
This question was raised as Issue #22 on my FreeRTOS library, in July 2017.
Best resolved by ensuring that the latest version of the Library is installed.
Emmm..I am supposedly to plug the USB cord to the top port, but I accidentally plugged it to the bottom port. I'm really new (know nothing) on Arduino. I'm trying to upload Robot_Motor_Core from File/Example/Robot_Motor, but the program does not even compile. The error message is as follow:
/Applications/Arduino.app/Contents/Resources/Java/libraries/Robot_Motor/ArduinoRobotMotorBoard.cpp:
In member function 'void RobotMotorBoard::_refreshMotorAdjustment()':
/Applications/Arduino.app/Contents/Resources/Java/libraries/Robot_Motor/ArduinoRobotMotorBoard.cpp:256:
error: 'TRIM' was not declared in this scope
Now I am just panicking because even the Robot_IR_Array_Test does not even compile as well. The error message is here:
Robot_IR_Array_Test.ino: In function 'void loop()':
Robot_IR_Array_Test:22: error: 'class RobotMotorBoard' has no member
named 'readIR'
Any advice???? How to set the Arduino robot back to default??
The help doc link is here: http://arduino.cc/en/Guide/Robot
The above problems appear to be with the IDE and not the robot. A brute force method of making a new directory with a fresh install or unzip of the IDE should fix the errors. And or a reboot or restart of Java.