Category: General

Installing WhamBam Flex on Creality CR-10 Max

CR-10 Max from Creality is a large printer. One thing i don’t like about it is the printing surface. I’m used to the comfort of Prusa flexible sheet in order to get the models removed easily from the build plate. And on Creality sometimes prints stick too well . So well that i had to take the build plate out and remove them. When printing shields this is annoying and time consuming. So i decided to give a try to WhamBam Flex system . Took around 10 days to get it. I didn’t found any tutorials on how to do it for CR-10 Max so i decided to create a how to so other if they are interested to have a reference point. Took me almost 20 minutes to install it. So here is how to install whambam on creality CR-10 Max:

There are 2 parts of the video ( joined them ) (when shooting the video i forgot to remove the last protective sheet , and after i actually tried to print PLA didn’t stick at all . I figured out what was wrong and added a short video at the end of the first one ) .

So I hope you find this useful.

TFM IOT – Home automation. Part 1 . Introduction

A project with simple requirements is beautiful . However simple requirements might turn into hard to achieve implementations . This is the case in this home automation project.
Requirement for this project is simple … automate everything
in the house:

  • Lights
  • Shades
  • Music and video
  • Heating / ventilation
  • Air quality
  • Security

What exactly we are trying to achieve :

  • Control any device in the house remotely
  • Monitor and graph all sensors
  • Take action if events are happening in t
    he house
  • Have a secure, simple and  beautiful user interface so anyone can use
  • WIFI everything
  • Take action by using scenarios

So in this article series we will try to come up with a complete solution that will fulfill all requirements. And we will take it one device at a time

TFM IOT Home automation Part 2 – How smart a lamp can be ?

A simple lamp. How much intelligence can we add to a simple lamp  ? Well that depends …

What we can control?

  • We can power on and power off the lamp.

What we can measure?

  • Power consumption
  • Check if the light bulb needs to be replaced

On first iteration we will power on and power off.

The results:

To put things one step forward we need to be have all the controls from all the devices across the house in one single place ( a central hub for the house and be able to control it from anywhere )

 

Cloudera CDH5 adding mysql drivers to sqoop

I installed a Cloudera hadoop CDH5 cluster ( 4 mchines )  and started to play with it .

However soon i ran into a weird problem. When i tried to import some data from mysql using sqoop i realized that the mysql drivers weren’t installed .

Installation was done using parcels . So i after reading a lot of documentation i realized that the directory where i was supposed to put the mysql jar is:

/opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/sqoop2/webapps/sqoop/WEB-INF/lib

I used mysql-connector-java-5.1.30-bin.jar .

If the file is not there … It wont be deployed .

How to reset a error in bind zone serial number

If you misstype the serial number in a bind zone file you might be in a lot of trouble . Especially if you misstype it like this:
2014300101 instead of 2014030101 . Yet there is a way to fix it:

According to the docs :
Add to the current serial number 2147483647 and rndc reload, then put the correct serial and rndc reload again.