Error to connect Wemos D1 R2 to Mysql

[ChinaBurn]

Exception 28: LoadProhibited: A load referenced a page mapped with an attribute that does not permit loads
PC: 0x40202574
EXCVADDR: 0x00000049

Decoding stack results
0x40220450: UpdaterClass::end(bool) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\Updater.cpp line 540
0x402025c7: lfs_dir_alloc at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 1466
0x402025b4: lfs_dir_alloc at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 1459
0x402041c4: lfs_fs_forceconsistency at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 4172
0x4020674c: esp8266webserver::ESP8266WebServerTemplate ::collectHeaders() at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WebServer\src/ESP8266WebServer-impl.h line 621
0x40227739: classify_object_over_fdes at /workdir/repo/gcc-gnu/libgcc/unwind-dw2-fde.h line 157
0x40206718: esp8266webserver::ESP8266WebServerTemplate ::RequestArgument::~RequestArgument() at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/WString.h line 79
0x40202f04: lfs_file_rawwrite at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 2990
0x40202f28: lfs_file_rawwrite at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 2311
0x40203084: lfs_file_rawwrite at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs_util.h line 102
0x4020297b: lfs_bd_flush at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 147
0x402151b2: WiFiClient::available() at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src\WiFiClient.cpp line 252
0x401006bf: Twi::onTwipEvent(unsigned char) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_si2c.cpp line 580
0x4010089e: __digitalWrite(uint8_t, uint8_t) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_wiring_digital.cpp line 92
0x40100294: schedule_recurrent_function_us(std::function  const&, unsigned int, std::function  const&) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\Schedule.cpp line 118
0x40215c18: WiFiServer::begin(unsigned short) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src\WiFiServer.cpp line 61
0x401006bf: Twi::onTwipEvent(unsigned char) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_si2c.cpp line 580
0x40202abe: lfs_bd_prog at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 213
0x40202832: lfs_init at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 3503
0x40202216: lfs_ctz_traverse at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 2407
0x40206bc8: esp8266webserver::ESP8266WebServerTemplate ::_parseForm(WiFiClient&, String const&, unsigned int) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/WString.h line 79
0x40202c94: lfs_file_flush at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 2731
0x40201f70: lfs_dir_getread at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 678
0x40202f28: lfs_file_rawwrite at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 2311
0x40201101: lfs_dir_commit_size at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 1542
0x40206bc8: esp8266webserver::ESP8266WebServerTemplate ::_parseForm(WiFiClient&, String const&, unsigned int) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/WString.h line 79
0x40203c28: lfs_dir_commit at c:\users\administrator\appdata\local\arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\littlefs\lib\littlefs/lfs.c line 1878
0x40100b51: umm_assimilate_up(umm_heap_context_t*, uint16_t) at C:\Users\Administrator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\umm_malloc\umm_malloc.cpp line 353

Settings in IDE

• Module: [Generic ESP8266 Module|Wemos D1 mini r2|Nodemcu|other]
• Flash Mode: [qio|dio|other]
• Flash Size: [4MB/1MB]
• lwip Variant: [v1.4|v2 Lower Memory|Higher Bandwidth]
• Reset Method: [ck|nodemcu]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz|160MHz]
• Upload Using: [OTA|SERIAL]
• Upload Speed: [115200|other] (serial upload only)

#include <ESP8266WiFi.h>           // Use this for WiFi instead of Ethernet.h
#include <MySQL_Connection.h>
#include <MySQL_Cursor.h>

IPAddress server_addr(10,0,1,35);  // IP of the MySQL *server* here
char user[] = "root";              // MySQL user login username
char password[] = "secret";        // MySQL user login password

// Sample query
char INSERT_SQL[] = "INSERT INTO test_arduino.hello_arduino (message) VALUES ('Hello, Arduino!')";

// WiFi card example
char ssid[] = "your-ssid";         // your SSID
char pass[] = "ssid-password";     // your SSID Password

WiFiClient client;                 // Use this for WiFi instead of EthernetClient
MySQL_Connection conn(&client);
MySQL_Cursor* cursor;

void setup()
{
  Serial.begin(115200);
  while (!Serial); // wait for serial port to connect. Needed for Leonardo only

  // Begin WiFi section
  Serial.printf("\nConnecting to %s", ssid);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  // print out info about the connection:
  Serial.println("\nConnected to network");
  Serial.print("My IP address is: ");
  Serial.println(WiFi.localIP());

  Serial.print("Connecting to SQL...  ");
  if (conn.connect(server_addr, 3306, user, password))
    Serial.println("OK.");
  else
    Serial.println("FAILED.");
  
  // create MySQL cursor object
  cursor = new MySQL_Cursor(&conn);
}

void loop()
{
  if (conn.connected())
    cursor->execute(INSERT_SQL);

  delay(5000);
}

[ChinaBurn]

Release 2.7.4 is ok, but Reported errors since Release 3.0.0,
Please check ChuckBell/MySQL_Connector_Arduino#171

[Falkenstone]

Ok,
in both function 'Encrypt_SHA1::write' of file 'MySQL_Encrypt_Sha1.cpp' i've added 'return 1' and now it works. The statement 'return 0' does not cause a crash, but you cannot log into MySQL. (Access denied for user 'XXX'@'YYYYYY' (using password: YES).

Falke

[d-a-v]

closed by ChuckBell/MySQL_Connector_Arduino#177