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Displaying posts with tag: connector (reset)
New Release! MySQL Connector/Arduino 1.1

The newest release of the MySQL Connector/Arduino library release-1.1 alpha is available for download. This new version represents a major step forward for the library in ease of use. Here are just a few of the important changes in this release.

  • Added to Library Manager : yes, you can download and install the library from the Arduino IDE now. Just open the Library Manager and search for "MySQL".
  • More Example Sketches : there are many more example sketches of how to use the new library from basic connections to complex queries and more! 
  • Redesigned Classes : the library has been redesigned with new classes making it much easier to use a wider variety of shields and modules. Now, you pass in the Client class for your shield and so long as it adheres to the Ethernet.Client primitive, you can use any library to initiate …
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Using Connector/J with Python

With Python you would normally use MySQL Connector/Python or the older MySQLdb to connect from Python to MySQL, but there are more options.

There are also multiple Python implementations: CPython (the main implementation), PyPy, Jython and IronPython. PyPy tries to be faster than CPython by using a Just-in-Time compiler. Jython runs on the JVM and IronPython runs on the .NET CLR.

Connector/Python by default (Without the C Extension) is a pure Python implementation and can work with most if not all implementations. And for MySQLdb there is a drop-in replacement called PyMySQL, which is a pure python implementation.

So there are many options …

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The performance of MySQL Connector/Python with C Extension

The source of this post is in this gist on nbviewer.

After reading about the difference between MySQL Connector/Python and MySQLdb on this blog post I wondered how the C Extension option in Connector/Python would perform.

If you want to run the code yourself you'll need: Jupyter/IPython, Python 3, Requests, MySQLdb, Connector/Python, Matplotlib, Pandas and MySQL.

In [1]:

%matplotlib notebook

In [2]:

import random
import gzip
import time

import pandas as pd
import matplotlib.pyplot as plt
import requests
import mysql.connector
import MySQLdb
for imp in [mysql.connector, MySQLdb]:
print('Using {imp} …
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MariaDB Connector/J failover support – case Amazon Aurora

MariaDB Connector/J has evolved a lot during the year. In this post I will talk about the failover capabilities in the connector and give some guidance on how to use them in some certain cases. One other important new feature that I’ll cover in a later article is the fact that MariaDB Connector/J can do […]

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New! MySQL Connector/Arduino release-1.0.4 GA and Documentation

After several iterations and a long period of community evaluation, I am happy to report I've released the newest, stable release of the MySQL Connector/Arduino. This library is designed to allow you to connect your Arduino via an Ethernet or WiFi shield to a MySQL database server running on your network (or the Internet!).

New Documentation!Best of all, I've written a reference manual that includes examples of how to use the connector in a variety of ways. Included in the document are advice on how to write your sketches, troubleshooting tips, and a long FAQ compiled from the many questions from my blogs.

Changes The only code change in this release is to fix a defect when using the connector with the latest versions of MySQL.

Downloading the ConnectorTo download the connector library and the new reference manual, visit …

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Announcing MySQL Connector/Arduino 1.0.2 Beta

I've completed a new release of the Connector/Arduino! The new release contains some major improvements with memory handling.

  • The library has been trimmed to save memory.
    • Static strings moved to PROGMEM strings
    • Unused structures removed (e.g. ok_packet)
    • Moved two more methods to optional compilation
  • The WITH_SELECT is turned *OFF* by default. If you want to use select queries, be sure to uncomment this in the mysql.h file.
  • Added a CHANGES.txt file to track changes between releases.

Memory, What Memory?
If you have used previous versions of the connector in medium to large sketches or have long query strings or even many variables, chances are you have hit the memory limit for your wee Arduino board.

This can manifest itself in a number of ways. Most notably, the sketch may work …

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MySQL Connectors, a Real Plus for Developers

MySQL Connectors provide connectivity to the MySQL server for client programs. APIs provide low-level access to the MySQL protocol and MySQL resources. Both Connectors and the APIs enable you to connect and execute MySQL statements from another language or environment. Oracle provides a number of these, enabling developers to build database applications in the language of their choice. Among those developed by Oracle are drivers for JDBC and ODBC. Any system that works with JDBC or ODBC can use MySQL. And you can find many more, including drivers for PHP, Perl, Python, Ruby, Tcl and even Eiffel!

To get a head start on developing with MySQL, take the MySQL for Developers training course. This …

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Announcing MySQL Connector/Arduino 1.0.1 Beta

I've completed a new release of the Connector/Arduino. The new version supports a few refinements and a new feature.

  • New! disconnect() method - enables disconnect from server. Note: you must call mysql_connect() to reconnect.
  • Better error handling for dropped packets. No more random reboots when bad packet appears.
  • Library can recover from short-term loss of connectivity. Along with bad packets is a check to make sure what is received is valid making the connector ignore garbage packets associated with a dropped connection.
  • Detection of Out of Memory condition. Should there not be enough memory to allocate the buffer for the Connector, you will see an OOM error (enable the serial monitor to see the errors). This reduces random reboots when memory gets too low.

I made this release because a number of people were running into problems with noisy, tenuous, or just plain …

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MySQL Connector/Arduino

Chuck Bell, one of my former colleague from MySQL AB, has created a connector for Arduino to MySQL. So this allows Arduino code to be a direct client of a MySQL or MariaDB server, with Ethernet and WiFi shields supported.

With Arduino boards being used more and more, this can come in really handy – not only for retrieving (for instance) centralised configuration data, but also for logging. Useful stuff. Thanks Chuck!


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Introducing MySQL Connector/Arduino 1.0.0 beta

There is a new release of the Connector/Arduino on Launchpad! See The new version supports a number of refinements and a few new features. These include:

  • Improved support for processing result sets
  • Conditional compilation to omit result set handling features to save program space
  • Support for the Arduino WiFi shield
  • New version() method to check version of the connector
  • Simplified download (no more patching SHA1!)

So What is It?
If you have never heard of Connector/Arduino, it is simply a library designed to allow the Arduino platform to connect to and issue queries to a MySQL Database server.

Simply add an Ethernet shield to your Arduino and use the library to connect your Arduino to a MySQL database server. Yes, no more web-based hand waving or third party systems! Cool.

New …

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