在RaspberryPi中运行处理代码时，找不到用于处理的库。
我正在尝试使用处理4.0 来运行 Sketch 程序。该代码来自 freenove raspberrypi 套件。
我遇到了这个错误。
No library found for processing.io
No library found for processing.io
No library found for processing.io
Libraries must be installed in a folder named 'libraries' inside the sketchbook folder (see the Preferences window).
The package “processing.io” does not exist. You might be missing a library.
代码是snippt，似乎包括 processing.io is
/*****************************************************
* Filename : Sketch_09_1_1_Motor
* Description : Control speed and direction of the motor
* auther : www.freenove.com
* modification: 2016/08/22
*****************************************************/
import processing.io.*;
int motorPin1 = 17; //connect to the L293D
int motorPin2 = 27;
int enablePin = 22;
final int borderSize = 45; //border size
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奇怪的，通常是处理臂，应该用。
如果安装方法下载页面并选择适合的Raspberry Pi CPU架构（32或64位）。
过去，我成功使用处理3 Raspberry Pi Image （已预装已安装的处理）：如果您有备用microSD卡（或者不介意闪烁您现有的），则可能是备份计划。
即使是处理3，也希望您需要使用相同的
processing.io功能。Strange, normally Processing ARM should ship with the processing.io library.
If the install method the Freenove manual provides (
curl https://processing.org/download/install-arm.sh | sudo sh) doesn't work,I recommend trying the official Download page and selecting the Raspberry PI CPU architecture that fits (32 or 64 bit).
In the past I had success using the Processing 3 Raspberry PI Image (which has Processing preinstalled): this could be a backup plan if you have spare microSD card (or don't mind flashing over you're existing one).
Even though it's Processing 3, hopefully the same
processing.iofeatures you need will be available.