我是Atom / PlatformIO的新手，并尝试使用Arduino作为Arduino IDE的替代品进行开发。
〜规格〜
base code used: Arduino ESP sample code "WifiBlueToothSwitch.ino"
Board: ESP-WROOM-32
Additional Components: 1602A (2x16) LCD
在尝试使用LCD屏幕之前，我已经通过PlatformIO在ESP模块上成功运行了其他示例代码，但是当我尝试包含LiquidCrystal.h库时，它给了我一个构建错误：
src\main.cpp:22:27: fatal error: LiquidCrystal.h: No such file or directory
compilation terminated.
*** [.pioenvs\esp32dev\src\main.o] Error 1
[ERROR] Took 3.34 seconds
到目前为止，我已经搜索过几个关于这个问题的网站，大多数网站指的是缺少添加＆＃34; wire.h＆＃34;头文件，但即使将其包含在程序中，它仍然会给我这个错误。
我的内容如下：
#include <Arduino.h>
#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal.h>
所以我不完全确定为什么会出现这个问题。 我该如何解决这个问题？
编辑1：
我刚刚遇到另一个网站建议尝试通过控制台更新PlatformIO，但这无济于事。一切都被标记为＆＃34;最新的＆＃34;。
Documents\PlatformIO\Projects\171031-143050-esp32dev> platformio update
Updating tool-scons @ 3.20501.2 [Up-to-date]
Updating tool-unity @ 1.20302.1 [Up-to-date]
Updating pysite-pioplus @ 0.4.2 [Up-to-date]
Updating contrib-piohome @ 0.3.1 [Up-to-date]
Updating tool-pioplus @ 0.10.11 [Up-to-date]
Platform Manager
================
Platform Espressif 32
--------
Updating espressif32 @ 0.10.0 [Up-to-date]
Updating tool-esptoolpy @ 1.20000.0 [Up-to-date]
Updating toolchain-xtensa32 @ 1.50200.0 [Up-to-date]
Updating framework-arduinoespressif32 @ 1.2.0 [Up-to-date]
Updating tool-espotapy @ 1.0.0 [Up-to-date]
Library Manager
===============
Documents\PlatformIO\Projects\171031-143050-esp32dev>
编辑2：
我已经编译并通过Arduino IDE运行此代码并且可以确认它是否有效，因此问题似乎与PlatformIO IDE有关......
编辑3：
在遵循BMelis的建议后，我查看了PlatformIO.ini文件，并在其中添加了以下行：
lib_extra_dirs = C:\Program Files (x86)\Arduino\hardware\espressif\esp32\libraries
这修复了LiquidCrystal.h的初始错误，但是这在构建期间也产生了以下依赖性错误：
[11/06/17 08:52:58] Processing esp32dev (platform: espressif32; lib_extra_dirs: C:\Program Files (x86)\Arduino\hardware\espressif\esp32\libraries; board: esp32dev; framework: arduino)
Verbose mode can be enabled via `-v, --verbose` option
Collected 49 compatible libraries
Looking for dependencies...
Library Dependency Graph
|-- <WiFi> v1.0
|-- <Wire> v1.0
|-- <LiquidCrystal> v1.0.7
Compiling .pioenvs\esp32dev\lib\WiFi\WiFiAP.o
Compiling .pioenvs\esp32dev\lib\WiFi\WiFiGeneric.o
Compiling .pioenvs\esp32dev\lib\WiFi\WiFiMulti.o
Compiling .pioenvs\esp32dev\lib\WiFi\WiFiSTA.o
****ERROR OCCURRED****
C:\Program Files (x86)\Arduino\hardware\espressif\esp32\libraries\WiFi\src\WiFiAP.cpp:40:37: fatal error: apps/dhcpserver_options.h: No such file or directory
compilation terminated.
*** [.pioenvs\esp32dev\lib\WiFi\WiFiAP.o] Error 1
[ERROR] Took 8.13 seconds
我尝试在ini文件中添加第二个lib_extra_dirs命令来添加它提到的目录：
lib_extra_dirs = C:\Program Files (x86)\Arduino\hardware\espressif\esp32\tools\sdk\include\lwip\apps
然而，这没有解决问题。我现在不知道该做什么......
完整代码：
#include <Arduino.h>
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Sketch shows how to switch between WiFi and BlueTooth or use both
// Button is attached between GPIO 0 and GND and modes are switched with each press
#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal.h>
#define STA_SSID "HIDDEN FOR SECURITY"
#define STA_PASS "HIDDEN FOR SECURITY"
#define AP_SSID "esp32 @ my desk"
#define LED_PIN 5
//LCD variables on analog inputs, but used as digital I/O
//lcd_gnd = gnd
//lcd_vcc = +5v
//lcd_v0 = +5v & pot
const int lcd_rs = 27;
//lcd_rw = gnd
const int lcd_e = 14;
//lcd_d0 = n/a
//lcd_d1 = n/a
//lcd_d2 = n/a
//lcd_d3 = n/a
const int lcd_d4 = 32;
const int lcd_d5 = 33;
const int lcd_d6 = 25;
const int lcd_d7 = 26;
//lcd_bl1 = +5v
//lcd_bl2 = gnd
LiquidCrystal lcd(lcd_rs, lcd_e, lcd_d4, lcd_d5, lcd_d6, lcd_d7);
enum { STEP_BTON, STEP_BTOFF, STEP_STA, STEP_AP, STEP_AP_STA, STEP_OFF, STEP_BT_STA, STEP_END };
void onButton(){
static uint32_t step = STEP_BTON;
switch(step){
case STEP_BTON://BT Only
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting BT");
btStart();
break;
case STEP_BTOFF://All Off
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Stopping BT");
btStop();
break;
case STEP_STA://STA Only
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting STA");
WiFi.begin(STA_SSID, STA_PASS);
break;
case STEP_AP://AP Only
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Stopping STA");
WiFi.mode(WIFI_AP);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting AP");
WiFi.softAP(AP_SSID);
break;
case STEP_AP_STA://AP+STA
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting STA");
WiFi.begin(STA_SSID, STA_PASS);
break;
case STEP_OFF://All Off
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Stopping WiFi");
WiFi.mode(WIFI_OFF);
break;
case STEP_BT_STA://BT+STA
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting STA+BT");
WiFi.begin(STA_SSID, STA_PASS);
btStart();
break;
case STEP_END://All Off
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Stopping WiFi+BT");
WiFi.mode(WIFI_OFF);
btStop();
break;
default:
break;
}
if(step == STEP_END){
step = STEP_BTON;
} else {
step++;
}
//little debounce
delay(100);
}
void WiFiEvent(WiFiEvent_t event){
switch(event) {
case SYSTEM_EVENT_AP_START:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("AP Started");
Serial.print("AP Started");
WiFi.softAPsetHostname(AP_SSID);
break;
case SYSTEM_EVENT_AP_STOP:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("AP Stopped");
Serial.print("AP Stopped");
break;
case SYSTEM_EVENT_STA_START:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA Started");
Serial.print("STA Started");
WiFi.setHostname(AP_SSID);
break;
case SYSTEM_EVENT_STA_CONNECTED:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA Connected");
Serial.print("STA Connected");
WiFi.enableIpV6();
break;
case SYSTEM_EVENT_AP_STA_GOT_IP6:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA IPv6: ");
Serial.print("STA IPv6: ");
Serial.println(WiFi.localIPv6());
break;
case SYSTEM_EVENT_STA_GOT_IP:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA IPv4: ");
Serial.print("STA IPv4: ");
lcd.setCursor(0,1);
lcd.print(WiFi.localIP());
Serial.print(WiFi.localIP());
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA Disconnected");
Serial.print("STA Disconnected");
break;
case SYSTEM_EVENT_STA_STOP:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("STA Stopped");
Serial.print("STA Stopped");
break;
default:
break;
}
}
void setup() {
lcd.begin(16, 2); //tells arduino that the LCD is a 16x2 size LCD
lcd.clear(); //clear any previous text
lcd.setCursor(0, 0); // set cursor to column 0 of row 0 (first row, first block)
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, LOW); // LED off
Serial.begin(115200);
pinMode(0, INPUT_PULLUP);
WiFi.onEvent(WiFiEvent);
Serial.print("ESP32 SDK: ");
Serial.println(ESP.getSdkVersion());
Serial.println("Press the button to select the next mode");
lcd.setCursor(0, 0);
lcd.println("Press mode btn");
}
void loop() {
digitalWrite(LED_PIN, HIGH); // Turn on LED
static uint8_t lastPinState = 1;
uint8_t pinState = digitalRead(0);
if(!pinState && lastPinState){
onButton();
}
lastPinState = pinState;
}
答案 0 :(得分：0)
对于platformio，我这样工作（我在Win10上）： 我的所有项目都在＆＃34;我的文件＆＃34;。通用库位于＆＃34;我的文档/库＆＃34;中。具体的那些存在于＆＃34; lib＆＃34; pio项目的文件夹。
在platformio.ini中，我有以下内容：
<table align="center">
<thead>
<tr>
<th>Cycle Code</th>
<th>Product</th>
<th>Days Until Due</th>
</tr>
</thead>
<tbody>
{BEGIN*REPEAT}
<tr>
<td>{UDF_CYCLE}</td>
<td>{Product}</td>
<td><span data-daystilldue="{daystilldue}">{daystilldue}</span></td>
</tr>
<tr>
<td>{UDF_CYCLE}</td>
<td>Example 1</td>
<td><span data-daystilldue="1">1</span></td>
</tr>
<tr>
<td>{UDF_CYCLE}</td>
<td>Example 2</td>
<td><span data-daystilldue="0">0</span></td>
</tr>
<tr>
<td>{UDF_CYCLE}</td>
<td>Example 3</td>
<td><span data-daystilldue="-1">-1</span></td>
</tr>
<tr>
<td>{UDF_CYCLE}</td>
<td>Example 4</td>
<td><span data-daystilldue="-20">-20</span></td>
</tr>
{END*REPEAT}
</tbody>
</table>对于平台你可以评出正确的一个（阶段或发布但是对于Arduino ESP32＆＃34;发布＆＃34;非常......不稳定）
将正确的路径放在lib_extra_dirs中，并尝试远离隐藏＆＃34; Program Files＆＃34;中的所有库。文件夹，因为如果需要的话，在那里更改一些东西是非常不方便的。
答案 1 :(得分：0)
我认为您需要下载 LiquidCrystal 软件包，或者使用PlatformIO CLI下载它。检查一下：http://platformio.org/lib/show/887/LiquidCrystal/installation
将解压缩的LiquidCrystal文件夹复制到项目的/lib文件夹中，然后再尝试构建。
ps：私人/第三方图书馆应放置/lib文件夹。
答案 2 :(得分：0)
在终端中输入：
pio lib install "LiquidCrystal"
答案 3 :(得分：0)
我也遇到了这个问题。我认为最好的解决方案是将项目和董事会的条目添加到您的platformio.ini文件中。这样，您无需将库代码添加到自己的源代码树中，并且该解决方案可以抵御“在我的计算机上工作”，因为该项目不依赖于库在文件系统上的特定位置。请注意，我在此处针对特定版本指定了最大的可预测性，但是您不必这样做。
[env:nanoatmega328]
platform = atmelavr
board = nanoatmega328
framework = arduino
lib_deps = LiquidCrystal@1.5.0 #<--important line