Question

我试图将Arduino UNO板与嵌入了Quectel M95模块的GSM2Click板连接起来。 Vcc = 5V已经由开关正确设置。我使用外部直流电源为电路板供电。我已经建立了以下联系：

      ARDUINO pin                   |          GSM pin:
                   3 (TX)                                              RX                                   
                   2 (RX)                                              TX
                   8                                                   STA
                   7                                                   PWK (always high)

gsm2click板似乎处于活动状态，因为交换机电源和网络都已打开（net led闪烁）。我试图发送AT命令，但总是得到0作为答案：

#include <SoftwareSerial.h>

const int PWK= 7; // Analog output pin that the LED is attached to
const int STA= 8;
const int RX=2;
const int TX=3;
int STA_value;



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


void setup() {                
  // initialize the digital pin as an output.
  pinMode(PWK, OUTPUT);   // questo pin serve per accendere il dispositivo GSM
  pinMode(STA, INPUT);   

  pinMode(RX,INPUT);
  pinMode(TX,OUTPUT);


  gsmOn();


  Serial.begin(9600);  //Init seriale sw
  Serial.println("Arduino serial initialized!");
  delay(10); 

  mySerial.begin(9600);  //init seriale hw
  Serial.println("Software serial initialized!");
  delay(10); 



}




// the loop routine runs over and over again forever:
  void loop() 
  {

      sendCommand("AT");
      delay(10);

      readSerial();
      delay(1000);         

  }


void sendCommand(char* msg)
{ 
  mySerial.print(msg);
  Serial.println(msg);
  delay(1); 

}

void readSerial()
{
  while(mySerial.available()>0)
  {
    Serial.print(mySerial.read());
    delay(1);  
  }


}



void gsmOn() 
{ 
  // Takes 30 seconds to complete
  digitalWrite(PWK, HIGH);   // turn the Phone on
  delay(2);
}

有什么建议吗？

感谢所有人提前！

Answer 1

这是你的代码有些问题，所以我修改了这个后粘贴代码并尝试理解我想告诉你的内容

#include <SoftwareSerial.h>

const int PWK= 7; // Analog output pin that the LED is attached to
const int STA= 8;
const int RX=2;
const int TX=3;
int STA_value;



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


 void setup() {                
// initialize the digital pin as an output.
 pinMode(PWK, OUTPUT);   // questo pin serve per accendere il dispositivo GSM
 pinMode(STA, INPUT);   

 //pinMode(RX,INPUT);   //if u want to use this as serial port then don't declare this   I/O
 //pinMode(TX,OUTPUT);


gsmOn();


Serial.begin(9600);  //Init seriale sw
Serial.println("Arduino serial initialized!");
delay(10); 

mySerial.begin(9600);  //init seriale hw
Serial.println("Software serial initialized!");
delay(10); 
 }

 // the loop routine runs over and over again forever:
void loop() 
{
uint8_t answer=0;

// checks if the module is started
answer = sendCommand("AT", "OK", "OK", 2000);
if (answer == 1)
{
Serial.println("OK");
 }
  else
 Serial.println("Not Responding");
  delay(1000);         
  }
 int8_t sendCommand(char* ATcommand, char* expected_answer1, 
    char* expected_answer2, unsigned int timeout){
uint8_t x=0,  answer=0;
char response[100];
unsigned long previous;
memset(response, '\0', 100);    // Initialize the string
delay(100);
while( mySerial.available() > 0)
{
mySerial.read();    // Clean the input buffer
}
Serial.println(ATcommand);    // Send the AT command to serial port 
mySerial.println(ATcommand);    // Send the AT command to gsm module
previous = millis();
// this loop waits for the answer
do{
    // if there are data in the UART input buffer, reads it and checks for the asnwer
    if(mySerial.available() != 0){    
        response[x] = mySerial.read();
        x++;
        // check if the desired answer 1  is in the response of the module
        if (strstr(response, expected_answer1) != NULL)    
        {
            answer = 1;
        }
        // check if the desired answer 2 is in the response of the module
        else if (strstr(response, expected_answer2) != NULL)    
        {
            answer = 2;
        }
    }
}
// Waits for the asnwer with time out
while((answer == 0) && ((millis() - previous) < timeout)); 

return answer;
    }
void gsmOn() 
 { 
 // Takes 30 seconds to complete
 digitalWrite(PWK, HIGH);   // turn the Phone on
delay(2);
}

如果您还有任何问题，请发表评论

Arduino和GSM2Click板（Quectel M95）

1 个答案: