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Fona808 very weird problem
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Fona808 very weird problem

by sulautettu_fi on Fri Apr 09, 2021 4:34 am

Hello

I have very weird problem with fona808, i try to start with MQTT example and add gps to it.
It seems that if I comment away one line of Serial print out, the code works. Is it some timing problem between Soft serial and hw serial.

I found out that the IO key is missing from the AT commands when the code is not working.

https://drive.google.com/file/d/1pugnQB-JHxmBEtgKjGIGlGGHLSu5Rfk7/view?usp=sharing
https://drive.google.com/file/d/1Vmo9uF-gJGGN-Gj-KvCXAcS2DEflNbLG/view?usp=sharing


Screenview - not working:
https://drive.google.com/file/d/1VOxl7K5Ysgfak2of29_aSzlIhIIBaOHV/view?usp=sharing


Screenview - working:
https://drive.google.com/file/d/1kJCl86blaW9anZhwQpuOqLXA12ZgAVmY/view?usp=sharing


Terminal Logs:
https://drive.google.com/drive/folders/1y898g5X9gbOvgj_RBDxR9raTBAvYyQz0?usp=sharing

Code: Select all | TOGGLE FULL SIZE
/***************************************************
  Adafruit MQTT Library FONA Example

  Designed specifically to work with the Adafruit FONA
  ----> http://www.adafruit.com/products/1946
  ----> http://www.adafruit.com/products/1963
  ----> http://www.adafruit.com/products/2468
  ----> http://www.adafruit.com/products/2542

  These cellular modules use TTL Serial to communicate, 2 pins are
  required to interface.

  Adafruit invests time and resources providing this open source code,
  please support Adafruit and open-source hardware by purchasing
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.
  MIT license, all text above must be included in any redistribution
 ****************************************************/
#include <Adafruit_SleepyDog.h>
#include <SoftwareSerial.h>
#include "Adafruit_FONA.h"
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_FONA.h"

/*************************** FONA Pins ***********************************/

// Default pins for Feather 32u4 FONA
#define FONA_RX  2
#define FONA_TX  3
#define FONA_RST 4
SoftwareSerial fonaSS = SoftwareSerial(FONA_TX, FONA_RX);

Adafruit_FONA fona = Adafruit_FONA(FONA_RST);

/************************* GPRS Access Point *********************************/

  // Optionally configure a GPRS APN, username, and password.
  // You might need to do this to access your network's GPRS/data
  // network.  Contact your provider for the exact APN, username,
  // and password values.  Username and password are optional and
  // can be removed, but APN is required.
#define FONA_APN       "internet"
#define FONA_USERNAME  ""
#define FONA_PASSWORD  ""

/************************* Adafruit.io Setup *********************************/

#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883
#define AIO_USERNAME    "sulautettu_fi"
#define AIO_KEY         "7700569cc0654c298033cf966e7a1055"

/************ Global State (you don't need to change this!) ******************/

// Setup the FONA MQTT class by passing in the FONA class and MQTT server and login details.
Adafruit_MQTT_FONA mqtt(&fona, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);

// You don't need to change anything below this line!
#define halt(s) { Serial.println(F( s )); while(1);  }

// FONAconnect is a helper function that sets up the FONA and connects to
// the GPRS network. See the fonahelper.cpp tab above for the source!
boolean FONAconnect(const __FlashStringHelper *apn, const __FlashStringHelper *username, const __FlashStringHelper *password);

/****************************** Feeds ***************************************/

// Setup a feed called 'photocell' for publishing.
// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/photocell");

// Setup a feed called 'onoff' for subscribing to changes.
Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/onoff");

/*************************** Sketch Code ************************************/

// How many transmission failures in a row we're willing to be ok with before reset
uint8_t txfailures = 0;
#define MAXTXFAILURES 3

void setup() {
  while (!Serial);

  // Watchdog is optional!
  //Watchdog.enable(8000);
 
  Serial.begin(115200);

  Serial.println(F("Adafruit FONA MQTT demo"));

  mqtt.subscribe(&onoffbutton);

  Watchdog.reset();
  delay(5000);  // wait a few seconds to stabilize connection
  Watchdog.reset();
 
  // Initialise the FONA module
  while (! FONAconnect(F(FONA_APN), F(FONA_USERNAME), F(FONA_PASSWORD))) {
    Serial.println("Retrying FONA");
  }

  Serial.println(F("Connected to Cellular!"));

  Watchdog.reset();
  delay(5000);  // wait a few seconds to stabilize connection
 
  Serial.println(F("Enabling GPS..."));
  fona.enableGPS(true);
 
  Watchdog.reset();


}

uint32_t x=0;


////
////
/// LOOP starts

void loop() {
  // Make sure to reset watchdog every loop iteration!
  Watchdog.reset();

  //GPS
  float latitude, longitude, speed_kph, heading, speed_mph, altitude;

 
  // if you ask for an altitude reading, getGPS will return false if there isn't a 3D fix
  boolean gps_success = fona.getGPS(&latitude, &longitude, &speed_kph, &heading, &altitude);

  if (!gps_success) {

    Serial.print("GPS lat:");
    Serial.println(latitude, 6);
    Serial.print("GPS long:");
    Serial.println(longitude, 6);
    Serial.print("GPS speed KPH:");
    Serial.println(speed_kph);
    Serial.print("GPS speed MPH:");
    //Serial.println("GPS heading:");  // un comment this and code is not working
   
  }
 
 
 
  // GPS ends


 
  // Ensure the connection to the MQTT server is alive (this will make the first
  // connection and automatically reconnect when disconnected).  See the MQTT_connect
  // function definition further below.
  MQTT_connect();

  Watchdog.reset();
  // Now we can publish stuff!
  Serial.print(F("\nSending photocell val "));
  Serial.print(x);
  Serial.print("...");
  if (! photocell.publish(x++)) {
    Serial.println(F("Failed"));
    txfailures++;
  } else {
    Serial.println(F("OK!"));
    txfailures = 0;
  }

  Watchdog.reset(); 
  // this is our 'wait for incoming subscription packets' busy subloop
  Adafruit_MQTT_Subscribe *subscription;
  /*while ((subscription = mqtt.readSubscription(5000))) {
    if (subscription == &onoffbutton) {
      Serial.print(F("Got: "));
      Serial.println((char *)onoffbutton.lastread);
    }
  }*/

  // ping the server to keep the mqtt connection alive, only needed if we're not publishing
  //if(! mqtt.ping()) {
  //  Serial.println(F("MQTT Ping failed."));
  //}





////
////
/// LOOP ends
}


// Function to connect and reconnect as necessary to the MQTT server.
// Should be called in the loop function and it will take care if connecting.
void MQTT_connect() {
  int8_t ret;

  // Stop if already connected.
  if (mqtt.connected()) {
    return;
  }

  Serial.print("Connecting to MQTT... ");

  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
    Serial.println(mqtt.connectErrorString(ret));
    Serial.println("Retrying MQTT connection in 5 seconds...");
    mqtt.disconnect();
    delay(5000);  // wait 5 seconds
  }
  Serial.println("MQTT Connected!");
}

sulautettu_fi
 
Posts: 1
Joined: Sat Apr 23, 2016 12:26 pm

Please be positive and constructive with your questions and comments.