Category Archives: Geek

Sweet computer stuff I have found

Raspberry Pi Thermal Probe

How to read a temperature probe, save the value to a MySQL database and then show the value on a webpage or just show the value with no database.

 

See this link for how to setup a DS18B20+ thermal probe with a Raspberry Pi, these instructions  are the best that i have come across for this and will cover the bullet points below :

  • Enabling the 1 wire features in the Raspbian OS
  • Physically connecting the probe via a resistor to the RPi
  • Instructions on how to read the probe and a script example

https://www.modmypi.com/blog/ds18b20-one-wire-digital-temperature-sensor-and-the-raspberry-pi

Once you have followed the above steps you should have a working temperature probe, that’s great.. but what can you do with it now!?

For the piTank/piGrow projects,  I started off by just using the script provide in the instructions above, modifying it slightly and using that to display the temperature value on the piTank web-page. Using some JavaScript you can make the box’s refresh every x seconds, running the probe read script and showing a new value without the need for a page reload.  I call this a ‘live’ reading.

Continue reading Raspberry Pi Thermal Probe

Configure Client Network Time (NTP)

Information directly copied from : https://www.cs.cmu.edu/~help/networking/ntp.html –

for quic ref…

 Windows 7

Windows 7 systems benefit from using the full set of NTP servers, but cannot be configured to obtain NTP server information from DHCP. Because the control panel does not allow setting multiple servers, settings on these systems must be verified and changed from a command prompt. Systems which are members of the SCS domain will receive NTP configuration via domain group policy and should not be reconfigured.

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Li-ion battery overcharge

So one day I left a Voyo A1 mini tablet charging for a little too long, I thought, oh well – I will replace the battery at a later time and just leave it in a box for now.

Leaving an over charged Li-ion battery in a box for 7 months isn’t the best things to do ….

IMG_20151119_190150

Sorting some things out some time later I found the unit and wondered why the box wouldn’t shut completely, a peak in side and I see the below! luckily the box wasn’t kept next to a heat source as i guess things could of been worse.

IMAG0046

Site Address Change

As you can see this blog is now being hosted from Blog.AdieNicholls.co.uk (or AdieNicholls.co.uk/blog).

In the past I have moved WordPress installs from development to live and also live migrations without any issues until I came to move this site.

I had carried out all the normal steps to moving a WP install;

  • Backup root folder
  • Backup database
  • Change site location in settings>general>WordPress Address (URL) and Site Address (URL)
  • Export database
  • Upload root folder
  • Import Database
  • Run the following SQL command to update any paths that are outstanding:

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MS Windows Query Internet Explorer Version

The below script will remotely query MS Windows 7+ for what version of Internet Explore a PC has installed.

Download PSEXEC here

How to use:

Ensure you have PSEXEC installed and ready for use,  more info here

Save the below to a ‘.bat’ file of whatever name you like. On running the batch file you will be asked for a hostname, enter the hostname and press the enter key.

Once the Enter key is selected the system will return what version of IE is installed on the remote PC.

 

@echo off
REM *********************************************
REM A.Nicholls
REM http://www.adienicholls.co.uk/blogs
REM 25/05/2016
REM *********************************************

:start
REM Get remote PCs hostname
set /p id=Enter Hostname:

psexec \\%id% -h cmd /c reg query "HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer" /v "svcVersion"

Goto Start
:end