I’m here to share my extensive electronics and technical experience working with Arduino, Raspberry Pi, sensors, motors, lighting, and finishing with CNC machining and 3D Printing.
What would you like to make? Leave your comment and let’s get started!
There are two important sections of The Inventory Management System that need to be backup and/or restore. The system stores images that are uploaded in a directory within the source-code. Backup this directory or the entire application to a folder on your file system.
Example:
sudo cp -R /var/www/html/warehouse-inventory-system /home/pi/Downloads/
To Export a database, open up terminal, making sure that you are not logged into MySQL and type,
mysqldump -u [username] -p [database name] > [database name].sql
mysqldump -u'root' -p'password' oswa_inv > /path/to/oswa_inv.sql
The database that selected in the command will now be exported to a file.
Log into mysql command-line interface:
mysql -u'username' -p'password'
If you are having difficulty logging into mysql please see the section below, How to Reset Your Password
WARNING! You are about to permanently delete ALL of your data.
DROP DATABASE oswa_inv;
CREATE DATABASE oswa_inv;
source oswa_inv < /path/to/oswa_inv.sql
Exit mysql.
When you first install MySQL, you have to set up your root password. However, should you forget it at any point, you can still recover it.
In terminal, stop the MySQL process
/etc/init.d/mysql stop
In safe mode, you will be able to make changes within the MySQL system with a root password alone, without the need for MySQL root password.
sudo mysqld_safe --skip-grant-tables &
Once safe mode has started up, log into MySQL and when prompted, use your standard root password.
mysql -u root mysql
Finally, set up the new MySQL root password by typing the command below. Replace “newpassword” with the password of your choice.
update user set password=PASSWORD("newpassword") where User='root';
Be sure to reload everything:
FLUSH PRIVILEGES;
and you now have a new root password.
The FastLED library is an impressive piece of work:
https://github.com/FastLED/FastLED/wiki/Basic-usage
After you download and install the library give it a try:
The purpose of running this example is to determine what settings are needed to use the FastLED library. For this example I’m using an Arduino Uno. The Uno has a ground pin next to pin 13, so for convenience, I’m using pin 13 as a low-current Vcc for the RGB LED lights strip:
pinMode(13, OUTPUT); digitalWrite(13, HIGH); // The data pin is the pin we are using to connect to the Arduino. // Data pin that led data will be written out over #define DATA_PIN 12 // How many individual LED modules are on the strip? #define NUM_LEDS 10 // When using an SPI based chipset, the there should be four wires // Clock pin only needed for SPI based chipsets when not using hardware SPI //#define CLOCK_PIN 8
Important configuration setting is to specify the model of LED strips being used. May require some try-and-error.
// Uncomment one of the following lines for your leds arrangement. … // FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS); FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS); // FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS); // FastLED.setBrightness(CRGB(255,255,255)); // FastLED.addLeds<GW6205, DATA_PIN, RGB>(leds, NUM_LEDS); …
A nice variety of color effects is included with the library. After trying out the RGBCalibration source code example, make the changes need to Demo Reel and give it a go: https://github.com/FastLED/FastLED/blob/master/examples/DemoReel100/DemoReel100.ino
Copy the settings for the LED strip to the DemoReel example
Upload and if all goes well, you should see a basic visual effects show.
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Phoenix Fire Lily: Solar rechargeable battery connected to a flickering LED inside an artificial lily flower residing in a hand-crafted wooden vase.
I don’t know about you, but I rarely have money to spend on projects and whenever possible reusing and re-purposing junk is ideal. Many of my projects contain parts I’ve purchased at local dollar stores and items found through eBay.
A look inside the inexpensive battery case.
You can purchase a completed Phoenix Fire Lily directly from me as a functioning example.
