SerialAT.available always at 0. Help me please!

[carminelau]

Hi, I can't understand why the serial.available is always 0. I have two codes, one working and one not working. This is the one that works:

#define DEBUG 0
#define TINY_GSM_MODEM_SIM7000
#define TINY_GSM_RX_BUFFER 1024 // Set RX buffer to 1Kb
#define SerialAT Serial1

// set GSM PIN, if any
#define GSM_PIN ""

// Your GPRS credentials, if any
const char apn[]  = "em";     //SET TO YOUR APN
const char gprsUser[] = "";
const char gprsPass[] = "";

#include <TinyGsmClient.h>
#include <SPI.h>
#include <SD.h>
#include <Ticker.h>

#ifdef DUMP_AT_COMMANDS  // if enabled it requires the streamDebugger lib
#include <StreamDebugger.h>
StreamDebugger debugger(SerialAT, Serial);
TinyGsm modems(debugger);
#else
TinyGsm modems(SerialAT);
#endif

#define uS_TO_S_FACTOR 1000000ULL  // Conversion factor for micro seconds to seconds
#define TIME_TO_SLEEP  60          // Time ESP32 will go to sleep (in seconds)

#define UART_BAUD   115200
#define PIN_DTR     25
#define PIN_TX      27
#define PIN_RX      26
#define PWR_PIN     4

int counter, lastIndex, numberOfPieces = 24;
String pieces[24], input;
int cont = 0;

void modem_on() {
  Serial.println("\nStarting Up Modem per GPS...");
  pinMode(PWR_PIN, OUTPUT);
  digitalWrite(PWR_PIN, HIGH);
  delay(300);
  digitalWrite(PWR_PIN, LOW);
  delay(10000);                 //Wait for the SIM7000 communication to be normal, and will quit when receiving OK

  int i = 10;

  while (i) {
    SerialAT.println("AT");
    delay(500);
    if (SerialAT.available()) {
      String r = SerialAT.readString();

      if ( r.indexOf("OK") >= 0 ) {
        break;
      }
    }
    delay(500);
    i--;

  }
}

void setup() {
  Serial.begin(9600); // Set console baud rate
  SerialAT.begin(UART_BAUD, SERIAL_8N1, PIN_RX, PIN_TX);
  delay(100);

  modem_on();
}

void loop() {

  Serial.print("Campionatura: ");
  Serial.println(cont);

  Serial.println("Accensione GPS ATCOMMAND");
  SerialAT.println("AT+CGNSPWR=1");
  delay(2000);
  if (SerialAT.available()) {
    String ri = SerialAT.readString();
    Serial.println(ri);
  }

  delay(2000);

  Serial.println("Richiesta Dati GPS");
  SerialAT.println("AT+CGNSINF");
  delay(5000);
  if (SerialAT.available()) {

    String r = SerialAT.readString();
    Serial.println(r.length());

    String latitudine = r.substring(46, 55);
    String longitudine = r.substring(56, 65);

    Serial.print("Latitudine: ");
    Serial.print(latitudine);
    Serial.print(" Longitudine: ");
    Serial.println(longitudine);

    Serial.println(r);

  }

  delay(8000);

  Serial.println("Spegnimento GPS");
  SerialAT.println("AT+CGNSPWR=0");
  delay(2000);
  if (SerialAT.available()) {
    String ri = SerialAT.readString();
    Serial.println(ri);
  }
  cont = cont + 1;
}

I have integrated this working code into the firmware I am creating, but it doesn't work. This not working:

const char gprsUser[] = "";
const char gprsPass[] = "";

#define TINY_GSM_MODEM_SIM7000
#define TINY_GSM_RX_BUFFER 1024 // Set RX buffer to 1Kb
#define TINY_GSM_USE_GPRS true

#define SerialAT Serial1

#include "ArduinoHttpClient.h"
#include <TinyGsmClient.h>
#include <Ticker.h>

TinyGsm modem(SerialAT);
TinyGsmClient clientSim(modem);

int counters, lastIndexs, numberOfPiecess = 24;
String piecess[24], inputs;

#define UART_BAUD   115200
#define PIN_DTR     25
#define PIN_TX      27
#define PIN_RX      26
#define PWR_PIN     4

void initSim() {
  Serial.begin(9600);
  SerialAT.begin(UART_BAUD, SERIAL_8N1, PIN_RX, PIN_TX);
  modem.init();
  modem.sendAT("+SGPIO=0,4,1,0");
}

bool connectModem() {
  if (!modem.restart()) {
    pinMode(PWR_PIN, OUTPUT);
    digitalWrite(PWR_PIN, HIGH);
    delay(300);
    digitalWrite(PWR_PIN, LOW);
    delay(5000);                 //Wait for the SIM7000 communication to be normal, and will quit when receiving OK

    modem.factoryDefault();
  }
  modem.setNetworkMode(51);
  modem.setPreferredMode(1);
  ATConnect();
#if DEBUG 1
  Serial.print("Waiting for network...");
#endif
  if (!modem.waitForNetwork()) {//default un minuto
#if DEBUG 1
    Serial.println(" fail");
#endif
    modem.gprsDisconnect();
    modem.poweroff();
    return false;
  } else {
    modem.gprsConnect(apn.c_str(), gprsUser, gprsPass);
  }
#if DEBUG 1
  Serial.println(" success");
#endif
  if (modem.isGprsConnected()) {
#if DEBUG 1
    Serial.println("GPRS connected");
    String ccid = modem.getSimCCID();
    Serial.println("CCID: " + ccid);

    String imei = modem.getIMEI();
    Serial.println("IMEI: " + imei);

    String cop = modem.getOperator();
    Serial.println("Operator: " + cop);

    IPAddress local = modem.localIP();
    Serial.println("Local IP: " + String(local));

    int csq = modem.getSignalQuality();
    Serial.println("Signal quality: " + String(csq));

    SerialAT.println("AT+CPSI?");     //Get connection type and band
    delay(500);
    if (SerialAT.available()) {
      String r = SerialAT.readString();
      Serial.println(r);
    }
    return true;
#endif
  }
}

void spegniModem() {
  modem.gprsDisconnect();
  modem.poweroff();
}

String getDateTime() {
  String s = "";
#if DEBUG 1
  Serial.print("gprs: ");
  Serial.println(gprs);
#endif
  const char server[] = "188.166.29.27";
  const char resource[] = "/datatime";
  const int  port = 5000;

  if (!connectModem()) {
    return "-1";
  }
  HttpClient httpSim(clientSim, server, port);

  int err = httpSim.get(resource);
  if (err != 0) {
#if DEBUG 1
    Serial.println(F("ERRORE"));
#endif
    return "-1";
  } else {
    int status = httpSim.responseStatusCode();
#if DEBUG 1
    Serial.print(F("Response status code: "));
    Serial.println(status);
#endif
    if (status == 200) {
      String response = httpSim.responseBody();
#if DEBUG 1
      Serial.println(F("Response:"));
      Serial.println(response);
#endif
      s = splitStringData(response);
    } else {
#if DEBUG 1
      Serial.println("errore config data");
#endif
      return "-1";
    }
  }

  modem.gprsDisconnect();
  modem.poweroff();
  return s;
}

String splitStringData(String stringa) {
  char s[stringa.length() + 1];
  String stringReturn = "";
  char c1 = '{';
  char c2 = '}';
  bool copia = false;
  int i = 0;
  stringa.toCharArray(s, stringa.length() + 1);

  while (s[i] != c2) {
    if (s[i] == c1) {
      copia = true;
      i++;
    }
    if (copia) {
      stringReturn += s[i];
    }
    i++;

  }
#if DEBUG 1
  Serial.println(stringReturn);
#endif
  return stringReturn;
}

void ATConnect() {
  SerialAT.println("AT+CGDCONT?");
  delay(500);
  if (SerialAT.available()) {
    inputs = SerialAT.readString();
    for (int i = 0; i < inputs.length(); i++) {
      if (inputs.substring(i, i + 1) == "\n") {
        piecess[counters] = inputs.substring(lastIndexs, i);
        lastIndexs = i + 1;
        counters++;
      }
      if (i == inputs.length() - 1) {
        piecess[counters] = inputs.substring(lastIndexs, i);
      }
    }
    // Reset for reuse
    inputs = "";
    counters = 0;
    lastIndexs = 0;

    for ( int y = 0; y < numberOfPiecess; y++) {
      for ( int x = 0; x < piecess[y].length(); x++) {
        char c = piecess[y][x];  //gets one byte from buffer
        if (c == ',') {
          if (inputs.indexOf(": ") >= 0) {
            String data = inputs.substring((inputs.indexOf(": ") + 1));
            if ( data.toInt() 0 && data.toInt() < 25) {
              modem.sendAT("+CGDCONT=" + String(data.toInt()) + ",\"IP\",\"" + String(apn) + "\",\"0.0.0.0\",0,0,0,0");
            }
            inputs = "";
            break;
          }
          // Reset for reuse
          inputs = "";
        }
        else {
          inputs += c;
        }
      }
    }
  }
}

void readGPS() {

  int i = 10;

  while (i) {
    SerialAT.println("AT");
    delay(500);
    if (SerialAT.available()) {
      String r = SerialAT.readString();
      Serial.println(r);
      if ( r.indexOf("OK") >= 0 ) {
        break;
      }
    }
    delay(500);
    i--;

  }

#if DEBUG 1
  Serial.println("Accensione GPS ATCOMMAND");
#endif
  SerialAT.print("AT+CGNSPWR=1\r\n");
  delay(500);

  if (SerialAT.available()) {
#if DEBUG 1
    String accensione = SerialAT.readString();
    Serial.print(accensione);
#endif
  }

  delay(2000);
  for (int i = 0; i < 15; i++) {
    Serial.println("Richiesta Dati GPS");
    SerialAT.print("AT+CGNSINF\r\n");
    delay(500);

    while(SerialAT.available()) {
      Serial.print(SerialAT.available());
      String richiesta = SerialAT.readString();
#if DEBUG 1
      Serial.print(richiesta.length());

#endif
      lat = richiesta.substring(46, 55);
      lon = richiesta.substring(56, 65);

#if DEBUG 1
      Serial.print("Latitudine: ");
      Serial.print(lat);
      Serial.print(" Longitudine: ");
      Serial.print(lon);

      Serial.print(richiesta);
      if (lat.toFloat() 0 && lon.toFloat() 0) {
        break;
      }
#endif

    }
  }

  delay(2000);

  Serial.println("Spegnimento GPS");
  SerialAT.print("AT+CGNSPWR=0\r\n");
  delay(500);
  if (SerialAT.available()) {
#if DEBUG 1
    String spegnimento = SerialAT.readString();
    Serial.print(spegnimento);
#endif
  }
}

[SRGDamia1]

Is there a reason you're not using the gprsConnect(...) and other library functions?