嗨，我的代码中使用Adafruit Fona和Arduino Uno上的GSM存在错误。我的void loop（）有错误，它向我发送了一个错误：

Question

这是错误：ISO C ++禁止将字符串常数转换为'char*'[-wwrite-strings] 如果（！ 顺便说一句，我正在使用Arduino和Adafruit Fona，任何想要帮助的人都非常感谢

这是我的代码

void loop() {
  
   char* bufPtr = fonaNotificationBuffer;    //handy buffer pointer
  
  if (fona.available())      //any data available from the FONA?
  {
    int slot = 0;            //this will be the slot number of the SMS
    int charCount = 0;
    //Read the notification into fonaInBuffer
    do  {
      *bufPtr = fona.read();
      Serial.write(*bufPtr);
      delay(1);
    } while ((*bufPtr++ != '\n') && (fona.available()) && (++charCount < (sizeof(fonaNotificationBuffer)-1)));
    
    //Add a terminal NULL to the notification string
    *bufPtr = 0;

    //Scan the notification string for an SMS received notification.
    //  If it's an SMS message, we'll get the slot number in 'slot'
    if (1 == sscanf(fonaNotificationBuffer, "+CMTI: " FONA_PREF_SMS_STORAGE ",%d", &slot)) {
      Serial.print("slot: "); Serial.println(slot);
      
      char callerIDbuffer[32];  //we'll store the SMS sender number in here
      
      // Retrieve SMS sender address/phone number.
      if (! fona.getSMSSender(slot, callerIDbuffer, 31)) {
        Serial.println("Didn't find SMS message in slot!");
      }
      Serial.print(F("FROM: ")); Serial.println(callerIDbuffer);
    
        // Retrieve SMS value.
        uint16_t smslen;
        if (fona.readSMS(slot, smsBuffer, 250, &smslen)) { // pass in buffer and max len!
          Serial.println(smsBuffer);
        }

      //Send back an automatic response
      Serial.println("Sending reponse...");
      if (!fona.sendSMS(callerIDbuffer, "Hey, I got your text!")) {
        Serial.println(F("Failed"));
      } else {
        Serial.println(F("Sent!"));
      }
      
      // delete the original msg after it is processed
      //   otherwise, we will fill up all the slots
      //   and then we won't be able to receive SMS anymore
      if (fona.deleteSMS(slot)) {
        Serial.println(F("OK!"));
      } else {
        Serial.print(F("Couldn't delete SMS in slot ")); Serial.println(slot);
        fona.print(F("AT+CMGD=?\r\n"));
      }
    }
  }
}

我认为char有错误，但我无法解决

Answer 1

这只是糟糕的库，它不使用const char *对c字符串参数，这些参数不会在功能内部更改。这是C ++中的旧校C风格方法。

另外，应该将其报告为警告，而不是错误。现在您有两个选择 - 修复该库或忽略此警告。我不喜欢第二种选择，但这对您来说是最简单的方法（但是忽略警告不是一件好事，有时它们可​​能真的很讨厌的错误）。