Question

所以我试图用 arduino 控制代币接收器。我正在尝试通过键盘发送 AT 命令！例如，如果我在键盘上按“D”，我想发送一个像“AT%A”这样的 AT 命令来将硬币传送到钱箱

这是我的代码，第一部分没问题，当我插入硬币时，我在串行监视器上得到了结果，但我现在卡在相反的状态，发送命令来控制硬币接收器 escrw


#include <SoftwareSerial.h>
#include <Keypad.h>

SoftwareSerial mySerial(10, 11); // RX, TX

String readString = "";         // a String to hold incoming data
String x="AT%A"; 
bool stringComplete = false; 
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the cymbols on the buttons of the keypads

char hexaKeys [ROWS] [COLS] =  { {'1', '4', '7', '*'},

                                  {'2', '5', '8', '0'},

                                  {'3', '6', '9', '#'},

                                  {'A', 'B', 'C', 'D'} };
byte rowPins [COLS] = {27,29,31,33}; //Columns 0 to 3

byte colPins[ROWS] = {35,37,25,23}; //Rows 0 to 3


Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); // whether the string is complete
void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }


  Serial.println("Veillez inserez les piéces");

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  mySerial.println("Hello, world?");
}

/*void loop() { // run over and over
  if (mySerial.available()) {
   const int str = Serial.write(mySerial.read());
    Serial.print(str);
  }
 */
void loop() {
  char customKey = customKeypad.getKey();

  while (mySerial.available()) {
    delay(3);  
    char c = mySerial.read();
    readString += c; 
  }
  readString.trim();
  if (readString.length() >0) {
    if (readString == "+C:00002"){
      Serial.println("1000 millimes inserées");
    }
    else if (readString == "+C:00003"){
      Serial.println("100 millimes inserées");
    }
   else if (readString == "+C:00020"){
      Serial.println("200 millimes inserées");
    }
   else  if (readString == "+C:00017"){
      Serial.println("2000 millimes inserées");
    }
   else  if (readString == "+C:00011"){
      Serial.println("500 millimes inserées");
    }
  else  if (readString == "+C:00008"){
      Serial.println("50 millimes inserées");
    }
    else  Serial.println(readString);
    readString="";
  } 



    while (Serial.available()) {
      
     mySerial.write(Serial.read());
 if (customKey=='D'){
  
 mySerial.write("AT%A");
Serial.println("opening");
     
 }
}}
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使用 arduino 与硬币接收器进行串行通信

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