Freematics Traccar not sending GPS data over sim network

Hello,

I recently purchased a Freematics Traccar edition GPS and have successfully configured it. I am using the Traccar server with a paid subscription (https://server.traccar.org/).

When the GPS device is configured to operate over Wi-Fi, it transmits location data correctly. However, when I switch to SIM mode, the device appears to be online but does not send any location data.

I tried to plug it both on USB power outlet and OBD2. The result is the same.
I also tried to reconfigure it and leave the APN empty "". Nothing worked so far.

The sim is activated and it works, if I plug it into my phone I can see that the network connectivity is on and there is signal.

This is my config.h

#ifndef CONFIG_H_INCLUDED
#define CONFIG_H_INCLUDED

#ifdef CONFIG_ENABLE_OBD
#define ENABLE_OBD CONFIG_ENABLE_OBD
#endif
#ifdef CONFIG_ENABLE_MEMS
#define ENABLE_MEMS CONFIG_ENABLE_MEMS
#endif
#ifdef CONFIG_GNSS
#define GNSS CONFIG_GNSS
#endif
#ifdef CONFIG_STORAGE
#define STORAGE CONFIG_STORAGE
#endif
#ifdef CONFIG_BOARD_HAS_PSRAM
#define BOARD_HAS_PSRAM 1
#endif
#ifdef CONFIG_ENABLE_WIFI
#define ENABLE_WIFI CONFIG_ENABLE_WIFI
#define WIFI_SSID CONFIG_WIFI_SSID
#define WIFI_PASSWORD CONFIG_WIFI_PASSWORD
#endif
#ifdef CONFIG_ENABLE_BLE
#define ENABLE_BLE CONFIG_ENABLE_BLE
#endif
#ifdef CONFIG_ENABLE_HTTPD
#define ENABLE_HTTPD CONFIG_ENABLE_HTTPD
#endif
#ifdef CONFIG_SERVER_HOST
#define SERVER_HOST CONFIG_SERVER_HOST
#define SERVER_PORT CONFIG_SERVER_PORT
#define SERVER_PROTOCOL CONFIG_SERVER_PROTOCOL
#endif
#ifdef CONFIG_CELL_APN
#define CELL_APN CONFIG_CELL_APN
#endif

/**************************************
* Circular Buffer Configuration
**************************************/
#if BOARD_HAS_PSRAM
#define BUFFER_SLOTS 1024 /* max number of buffer slots */
#define BUFFER_LENGTH 384 /* bytes per slot */
#define SERIALIZE_BUFFER_SIZE 4096 /* bytes */
#else
#define BUFFER_SLOTS 32 /* max number of buffer slots */
#define BUFFER_LENGTH 256 /* bytes per slot */
#define SERIALIZE_BUFFER_SIZE 1024 /* bytes */
#endif

/**************************************
* Configuration Definitions
**************************************/
#define STORAGE_NONE 0
#define STORAGE_SPIFFS 1
#define STORAGE_SD 2

#define GNSS_NONE 0
#define GNSS_STANDALONE 1
#define GNSS_CELLULAR 2

#define PROTOCOL_UDP 1
#define PROTOCOL_HTTP 2
#define PROTOCOL_HTTPS 3

#define PROTOCOL_METHOD_GET 0
#define PROTOCOL_METHOD_POST 1

/**************************************
* OBD-II configurations
**************************************/
#ifndef ENABLE_OBD
#define ENABLE_OBD 1
#endif

// maximum consecutive OBD access errors before entering standby
#define MAX_OBD_ERRORS 3

/**************************************
* Networking configurations
**************************************/
#ifndef ENABLE_WIFI
#define ENABLE_WIFI 0
// WiFi settings
#define WIFI_SSID ""
#define WIFI_PASSWORD ""
#endif 

#ifndef SERVER_HOST
// cellular network settings
#define CELL_APN "web.ho-mobile.it"
// Freematics Hub server settings
#define SERVER_HOST "45.55.84.20"
#define SERVER_PROTOCOL PROTOCOL_UDP
#endif

// SIM card setting
#define SIM_CARD_PIN ""

// HTTPS settings
#define SERVER_METHOD PROTOCOL_METHOD_POST
#define SERVER_PATH "/hub/api"

#if !SERVER_PORT
#undef SERVER_PORT
#if SERVER_PROTOCOL == PROTOCOL_UDP
#define SERVER_PORT 5170
#elif SERVER_PROTOCOL == PROTOCOL_HTTP
#define SERVER_PORT 80
#elif SERVER_PROTOCOL == PROTOCOL_HTTPS
#define SERVER_PORT 443
#endif
#endif

// WiFi Mesh settings
#define WIFI_MESH_ID "123456"
#define WIFI_MESH_CHANNEL 13

// WiFi AP settings
#define WIFI_AP_SSID "TELELOGGER"
#define WIFI_AP_PASSWORD "PASSWORD"

// maximum consecutive communication errors before resetting network
#define MAX_CONN_ERRORS_RECONNECT 5
// maximum allowed connecting time
#define MAX_CONN_TIME 10000 /* ms */
// data receiving timeout
#define DATA_RECEIVING_TIMEOUT 5000 /* ms */
// expected maximum server sync signal interval
#define SERVER_SYNC_INTERVAL 120 /* seconds, 0 to disable */
// data interval settings
#define STATIONARY_TIME_TABLE {10, 60, 180} /* seconds */
#define DATA_INTERVAL_TABLE {1000, 2000, 5000} /* ms */
#define PING_BACK_INTERVAL 900 /* seconds */
#define SIGNAL_CHECK_INTERVAL 10 /* seconds */

/**************************************
* Data storage configurations
**************************************/
#ifndef STORAGE
// change the following line to change storage type
#define STORAGE STORAGE_SD
#endif

/**************************************
* MEMS sensors
**************************************/
#ifndef ENABLE_MEMS
#define ENABLE_MEMS 1
#endif

/**************************************
* GPS
**************************************/
#ifndef GNSS
// change the following line to change GNSS setting
#define GNSS GNSS_STANDALONE
#endif
// keeping GNSS power on during standby 
#define GNSS_ALWAYS_ON 0
// GNSS reset timeout while no signal
#define GNSS_RESET_TIMEOUT 300 /* seconds */

/**************************************
* Standby/wakeup
**************************************/
// motion threshold for waking up
#define MOTION_THRESHOLD 0.4f /* vehicle motion threshold in G */
// engine jumpstart voltage for waking up (when MEMS unavailable) 
#define JUMPSTART_VOLTAGE 14 /* V */
// reset device after waking up
#define RESET_AFTER_WAKEUP 1

/**************************************
* Additional features
**************************************/
#define PIN_SENSOR1 34
#define PIN_SENSOR2 26

#define COOLING_DOWN_TEMP 75 /* celsius degrees */

// enable(1)/disable(0) http server
#ifndef ENABLE_HTTPD
#define ENABLE_HTTPD 0
#endif

// enable(1)/disable(0) BLE SPP server (for Freematics Controller App).
#ifndef ENABLE_BLE
#define ENABLE_BLE 1
#endif


#endif // CONFIG_H_INCLUDED

Could you please assist me in diagnosing and resolving this issue?

Thank you!

What are your APN details? Are you sure it doesn't require username and password?

The APN is "web.ho-mobile.it", I'm based in Italy and I'm using ho mobile: https://supporto.ho-mobile.it/t5/Soluzioni-per-configurare/Configuro-il-mio-Smartphone/ta-p/112

They don't require username and password. If I plug the sim in my phone, it works.

Then I'm not sure. What do you see in the Freematics logs?

I have the same problem with a Ho-mobile sim. Were you able to find a solution?