SIM7000C接收不到AT指令？排查指南来了！🚀

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MEGA2560装配了SIM7000C，采用7.4V锂电池作为外部电源，跑样例代码无响应，SIM7000C的ON灯亮着，NET灯会闪烁，但是得不到数据，一直是"Turn ON SIM7000......"，真的很着急，求大佬帮忙！#include <Wire.h>
#include <DFRobot_SIM7000.h>

#define PIN_TX    7
#define PIN_RX    8
SoftwareSerial    mySerial(PIN_RX,PIN_TX);
DFRobot_SIM7000 sim7000;

void setup(){
int signalStrength,dataNum;
Serial.begin(115200);
while(!Serial);
sim7000.begin(mySerial);
Serial.println("Enter anything to get positioning ");
char loge[10];
readSerial(loge);
Serial.println("Getting position......");

Serial.println("Turn ON SIM7000......");
if(sim7000.turnON()){                                        //Turn ON SIM7000
      Serial.println("Turn ON !");
}

Serial.println("Set baud rate......");
while(1){
      if(sim7000.setBaudRate(19200)){                         //Set SIM7000 baud rate from 115200 to 19200 reduce the baud rate to avoid distortion
         Serial.println("Set baud rate:19200");
         break;
      }else{
         Serial.println("Faile to set baud rate");
         delay(1000);
      }
}

Serial.println("Check SIM card......");
if(sim7000.checkSIMStatus()){                               //Check SIM card
      Serial.println("SIM card READY");
}else{
      Serial.println("SIM card ERROR, Check if you h ave insert SIM card and restart SIM7000");
      while(1);
}

Serial.println("Init positioning function......");
while(1){
      if(sim7000.initPos()){
         Serial.println("Positioning function initialized");
         break;
      }else{
         Serial.println("Fail to init positioning function");
         delay(1000);
      }
}
}

void loop(){
Serial.println("Enter anything end with CRLF to get positioning ");
char loge[10];
readSerial(loge);
Serial.println("Getting position......");
if(sim7000.getPosition()){                                  //Get the current position
      Serial.print(" Longitude : ");
      Serial.println(sim7000.getLongitude());                   //Get longitude
      Serial.print(" Latitude : ");
      Serial.println(sim7000.getLatitude());                   //Get latitude
}else{
      Serial.println("Wrong data try again");
}
}

int readSerial(char result[]){
int i = 0;
while(1){
      while(Serial.available() > 0){
         char inChar = Serial.read();
         if(inChar == '\n'){
            result = '\0';
            Serial.flush();
            return 0;
         }
         if(inChar != '\r'){
            result = inChar;
            i++;
         }
      }
}
}

物联网, SIM808, Arduino

十万火急！SIM7000C接收不到AT指令

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