Picked Ari's changed to reduce stack size. Removed device info printing from state machine.

features/cellular/easy_cellular/CellularConnectionFSM.cpp

@@ -181,22 +181,6 @@ bool CellularConnectionFSM::open_sim()
     return state == CellularSIM::SimStateReady;
 }
 
-void CellularConnectionFSM::print_device_info()
-{
-    CellularInformation *info = _cellularDevice->open_information(_serial);
-    char device_info_buf[2048]; // may be up to 2048 according to 3GPP
-
-    if (info->get_manufacturer(device_info_buf, sizeof(device_info_buf)) == NSAPI_ERROR_OK) {
-        tr_info("Cellular device manufacturer: %s", device_info_buf);
-    }
-    if (info->get_model(device_info_buf, sizeof(device_info_buf)) == NSAPI_ERROR_OK) {
-        tr_info("Cellular device model: %s", device_info_buf);
-    }
-    if (info->get_revision(device_info_buf, sizeof(device_info_buf)) == NSAPI_ERROR_OK) {
-        tr_info("Cellular device revision: %s", device_info_buf);
-    }
-}
-
 bool CellularConnectionFSM::set_network_registration(char *plmn)
 {
     if (_network->set_registration(plmn) != NSAPI_ERROR_OK) {
@@ -401,7 +385,6 @@ void CellularConnectionFSM::state_device_ready()
             return;
         }
 
-        print_device_info();
         enter_to_state(STATE_SIM_PIN);
     } else {
         retry_state_or_fail();
@@ -532,7 +515,7 @@ nsapi_error_t CellularConnectionFSM::start_dispatch()
 {
     MBED_ASSERT(!_queue_thread);
 
-    _queue_thread = new rtos::Thread;
+    _queue_thread = new rtos::Thread(osPriorityNormal, 1024);
     if (!_queue_thread) {
         stop();
         return NSAPI_ERROR_NO_MEMORY;
@@ -573,15 +556,7 @@ void CellularConnectionFSM::network_callback(nsapi_event_t ev, intptr_t ptr)
                 continue_from_state(STATE_ATTACHING_NETWORK);
             }
         }
-    } /*else if (ev == NSAPI_EVENT_CONNECTION_STATUS_CHANGE) {
-        if (ptr == NSAPI_STATUS_GLOBAL_UP) {
-            // we are connected
-            if (_state == STATE_CONNECTING_NETWORK) {
-                _queue.cancel(_eventID);
-                continue_from_state(STATE_CONNECTED);
-            }
-        }
-    }*/
+    }
 
     if (_event_status_cb) {
         _event_status_cb(ev, ptr);

features/cellular/easy_cellular/CellularConnectionFSM.h

@@ -169,7 +169,6 @@ private:
     NetworkStack *get_stack();
 
 private:
-    void print_device_info();
     void report_failure(const char* msg);
     void event();
 

features/cellular/framework/AT/AT_CellularNetwork.cpp

@@ -275,8 +275,8 @@ nsapi_error_t AT_CellularNetwork::open_data_channel()
         tr_warn("Failed to CONNECT");
     }
     /* Initialize PPP
-     * mbed_ppp_init() is a blocking call, it will block until
-     * connected, or timeout after 30 seconds*/
+     * If blocking: mbed_ppp_init() is a blocking call, it will block until
+                  connected, or timeout after 30 seconds*/
     err = nsapi_ppp_connect(_at.get_file_handle(), callback(this, &AT_CellularNetwork::ppp_status_cb), _uname, _pwd, _ip_stack_type);
 #else
     // do check for stack to validate that we have support for stack

features/cellular/framework/targets/QUECTEL/BC95/QUECTEL_BC95_CellularStack.cpp

@@ -139,15 +139,15 @@ nsapi_size_or_error_t QUECTEL_BC95_CellularStack::socket_sendto_impl(CellularSoc
 {
     int sent_len = 0;
 
-    char hexstr[BC95_MAX_PACKET_SIZE*2 + 1] = {0};
-    char_str_to_hex_str((const char*)data, size, hexstr);
+    char *hexstr = new char[BC95_MAX_PACKET_SIZE*2];
+    int hexlen = char_str_to_hex_str((const char*)data, size, hexstr);
 
     _at.cmd_start("AT+NSOST=");
     _at.write_int(socket->id);
     _at.write_string(address.get_ip_address(), false);
     _at.write_int(address.get_port());
     _at.write_int(size);
-    _at.write_string(hexstr, false);
+    _at.write_bytes((uint8_t*)hexstr, hexlen);
     _at.cmd_stop();
     _at.resp_start();
     // skip socket id
@@ -155,6 +155,8 @@ nsapi_size_or_error_t QUECTEL_BC95_CellularStack::socket_sendto_impl(CellularSoc
     sent_len = _at.read_int();
     _at.resp_stop();
 
+    delete hexstr;
+
     if (_at.get_last_error() == NSAPI_ERROR_OK) {
         return sent_len;
     }
@@ -168,7 +170,7 @@ nsapi_size_or_error_t QUECTEL_BC95_CellularStack::socket_recvfrom_impl(CellularS
     nsapi_size_or_error_t recv_len=0;
     int port;
     char ip_address[NSAPI_IP_SIZE];
-    char hexstr[BC95_MAX_PACKET_SIZE*2 + 1];
+    char *hexstr = new char[BC95_MAX_PACKET_SIZE*2+1];
 
     _at.cmd_start("AT+NSORF=");
     _at.write_int(socket->id);
@@ -180,12 +182,13 @@ nsapi_size_or_error_t QUECTEL_BC95_CellularStack::socket_recvfrom_impl(CellularS
     _at.read_string(ip_address, sizeof(ip_address));
     port = _at.read_int();
     recv_len = _at.read_int();
-    _at.read_string(hexstr, sizeof(hexstr));
+    int hexlen = _at.read_string(hexstr, BC95_MAX_PACKET_SIZE*2+1);
     // remaining length
     _at.skip_param();
     _at.resp_stop();
 
     if (!recv_len || (recv_len == -1) || (_at.get_last_error() != NSAPI_ERROR_OK)) {
+        delete hexstr;
         return NSAPI_ERROR_WOULD_BLOCK;
     }
 
@@ -194,9 +197,10 @@ nsapi_size_or_error_t QUECTEL_BC95_CellularStack::socket_recvfrom_impl(CellularS
         address->set_port(port);
     }
 
-    if (recv_len > 0) {
-        hex_str_to_char_str((const char*) hexstr, recv_len*2, (char*)buffer);
+    if (hexlen > 0) {
+        hex_str_to_char_str((const char*) hexstr, hexlen, (char*)buffer);
     }
 
+    delete hexstr;
     return recv_len;
 }