Hi, my name is Valentin.
I use ESP8266 32M CP2102 NodeMCU programmed with Arduino Board Manager. It's SPI connected to RFID-RC522.
I experience problem with the "Create an instance of the cursor passing in the connection" as in Listing 5:
Simple Select Sketch written in _MySQL_Connector_Arduino_ReferenceManual.pdf
It is also used in reboot.ino which I wish to implement in my sketch. I simplified it in order to be sure that very way of instance creation of class _MySQLCursor makes trouble in my scheme. The problem looks at the Serial monitor like:
tail 8
chksum 0x2d
csum 0x2d
ets Jan 8 2013,rst cause:2, boot mode:(1,6)
ets Jan 8 2013,rst cause:4, boot mode:(1,6)
wdt reset
And this is my sketch:
/*
MySQL Connector/Arduino Example : basic select
*/
#include<SoftwareSerial.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <SPI.h>
#include <MFRC522.h>
#include <MySQL_Connection.h>
#include <MySQL_Cursor.h>
char ssid[] = "TPLINK";//
char pass[] = "12151800712272";
IPAddress server_addr(192, 168, 0, 33); // IP of the MySQL *server* here
char user[] = "iduser"; // MySQL user login username
char password[] = "parpada"; // MySQL user login password
#define SS_PIN 2 //FOR RFID SS PIN BECASUSE WE ARE USING BOTH ETHERNET SHIELD AND RS-522
#define RST_PIN 15
WiFiClient client;
SoftwareSerial mySerial(8, 9);
MySQL_Connection conn((Client *)&client);
char query[] = "SELECT 1 FROM dual";
// Create an instance of the cursor passing in the connection
MySQL_Cursor cur = MySQL_Cursor(&conn);
void setup() {
Serial.begin(115200);
delay(10);
mySerial.begin(115200);
SPI.begin();
// while (!Serial); // wait for serial port to connect
// Ethernet.begin(mac_addr);
// Begin WiFi section
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// print out info about the connection:
Serial.println("Connected to network");
IPAddress ip = WiFi.localIP();
Serial.print("My IP address is: ");
Serial.println(ip);
Serial.println("Connecting...");
if (conn.connect(server_addr, 3306, user, password)) {
delay(1000);
}
else
Serial.println("Connection failed.");
}
void loop() {
row_values *row = NULL;
long head_count = 0;
delay(1000);
Serial.println("1) Demonstrating using a cursor dynamically allocated.");// Initiate the query class instance
MySQL_Cursor *cur_mem = new MySQL_Cursor(&conn);
// Execute the query
cur_mem->execute(query);
// Fetch the columns (required) but we don't use them.
column_names *columns = cur_mem->get_columns();
// Read the row (we are only expecting the one)
do {
row = cur_mem->get_next_row();
if (row != NULL) {
head_count = atol(row->values[0]);
}
} while (row != NULL);
// Deleting the cursor also frees up memory used
delete cur_mem;
// Show the result
Serial.print(" NYC pop = ");
Serial.println(head_count);
}
My suggestion is that trouble comes when instance is created outside of the setup()
If it's inside setup() in the following way
// Initiate the query class instance
MySQL_Cursor *cur_mem = new MySQL_Cursor(&conn);
then the problem does not exist.
Could you please help me?
Hi, my name is Valentin. I use ESP8266 32M CP2102 NodeMCU programmed with Arduino Board Manager. It's SPI connected to RFID-RC522. I experience problem with the "Create an instance of the cursor passing in the connection" as in Listing 5: Simple Select Sketch written in _MySQL_Connector_Arduino_ReferenceManual.pdf It is also used in reboot.ino which I wish to implement in my sketch. I simplified it in order to be sure that very way of instance creation of class _MySQLCursor makes trouble in my scheme. The problem looks at the Serial monitor like:
And this is my sketch:
My suggestion is that trouble comes when instance is created outside of the setup() If it's inside setup() in the following way
then the problem does not exist. Could you please help me?