我们不太擅长编写代码，因此对于解决我们遇到的传输和接收问题的任何帮助都会很棒。
目标是：
- 将在 Nextion 显示屏上输入的数字发送到 Arduino Mega。
- 将数字存储并保存到 Arduino 编码中（有点像在代码中自动填充数字，而不必每次都点击“开始”。）
- 当红外中断光束被破坏时，Arduino 将数据发送到 Nextion 显示器以从“总数量”字段中减去。（<-- 在我们的编码中还没有走到这一步。）
- Nextion 根据 Arduino 的反馈显示“总数量”字段更改
问题：
通过点击 Nextion 显示屏上的“开始”按钮，我们成功地让程序运行，但这只是当我们在 Arduino 代码中手动输入数量时。然而，我们的问题是无法将数据条目从 Nextion 显示器自动填充到 Arduino 代码中。关于如何实现这一目标的任何想法？
''' #include <Servo.h>
#include "EasyNextionLibrary.h"
EasyNex myNex(Serial);
#define Nextion Serial
'''
''' //"cycleOne" 是一个变量，用于了解电机循环了多少次。
int cycleOne = 0;
//"stopLooping" variable is used in cases where you want to skip parts of code in a loop.
int stopLooping = 0;
//Variables that deal with the buzzer and servo for hopper one.
int countedOne = 0; //Initial value used by the program that will count up to the variable, "One".
int One = 0; /* Enter in the number to be ejected.
Ex: I want 5 bolts ejected, so I'll enter 5 for the "One" variable*/
const float cycleOneSafety = 1.5; //Used to help determine if the hopper is empty.
'''
'''
void setup() {
pinMode(startPin,INPUT);
digitalWrite(startPin,LOW);
//Indicates whether a pin is an input or output. Also gives power to required pins.
pinMode (bbrdOne, INPUT);
digitalWrite(bbrdOne, HIGH);
pinMode (bbrpOne, OUTPUT);
digitalWrite (bbrpOne, HIGH);
pinMode (bbtOne,OUTPUT);
digitalWrite (bbtOne,HIGH);
'''
'''
Serial.begin(9600);
//Nextion.begin(9600);
myNex.begin (9600);
delay (1000); //Gives Nextion time to intialize
'''
'''
void loop(){
Serial.println("Trigger1 void Loop is running");
myNex.NextionListen();
delay (30);
}
void trigger1(){
Serial.println("Void Trigger1 is called");
if(Nextion.available()>2){ //Reads if more than 2 bytes are sent (which we should have more than 2 bytes every time with <#>, <len>, <cmd>, and other special callouts from touchscreen
char start_char = Nextion.read(); // Created local variable (start_char) reads and stores the first byte
if (start_char == '#'){ // When we find the # character
uint8_t len = Nextion.read(); // Created local variable (len). Reads and stores
第二个字节的值。是后面的字节数的长度
unsigned long tmr_1 = millis();
boolean cmd_found = true;
while (Nextion.available()< len){ // Waiting for all bytes declared
if ((millis()-tmr_1)>100){ // Will not wait forever
cmd_found = false; // tmr_1 is a timer to avoid the stack in the while loop is there are no bytes on Serial
break;
}
if(cmd_found == true){ //command is found
uint8_t cmd = Nextion.read(); // Create local variable (cmd). Reads and stores next byte of data
switch (cmd){
case 'V': // or <case 0x56:> IF 'V' matches, we have the command group "Sent Variables"
// the next byte according to our protocol is the value for the <One>
One = Nextion.read(); //Reads and stores Hopper One quantity to eject byte at the variable
Nextion.print("n0.val="); // Lines are for Nextion debug
Nextion.print(One); // they are sent to the variables
// NextionEndCommand(); // numeric component on Nextion display component n0
//void NextionEndCommand()
Nextion.print("xFF\xFF\xFF");
break;
}
}
}
}
}
}
'''
'''
void trigger2(){
Serial.println("Void Trigger2 is called");
myNex.writeNum("bo.boc",2016);
// One = //Value of button for quantity to eject
startRead = 1;
ejecting();
}
/*
* The following if statement is for initializing variables from the Nextion
* touch screen before running through the main loop.
*/
'''
''' 无效弹出（）{
Serial.println("Void Ejecting is called");
if (startRead == 1){
cycleOne = 0;
error = 0;
start = 1;
Serial.println("Start Initiated...");
delay (1000);
Serial.println("Starting in:");
Serial.println("3");
delay (1000);
Serial.println("2");
delay (1000);
Serial.println("1");
delay (1000);
}
if (One > 0 and start == 1){
hopperOne();
}
if (error == 0 and start == 1){
delay(1000); //Delays the buzzer sounding for 1 second.
for(int x = 0;x != 3; x++){ //Changing the value that x has to reach,
tone(buzzer,200); // changes the number of times the buzzer will go off.
delay(500);
noTone(buzzer);
delay(500);
}
}
if (start == 1 and error == 0){
countedOne = 0;
error = 0;
start = 0;
}
else if (start == 1){
start = 0;
}
'''