Python script for “Arduino compatible” geiger counter on Raspberry Pi – outputs to Collectd format https://github.com/somesortoferror/geiger-counter Run with Collectd “exec” plugin Requires RPi.GPIO: sudo apt-get install python-rpi.gpio Connect interrupt pin of Geiger counter to GPIO12 of RPi (configurable in script) May need to run as root if /dev/gpiomem not available Used with a Collectd frontend … [Read more…]
In this post you’ll find my windows builds of rtl_sdr. The first link is the main branch and this is probably what most people will want. The other links are for keenerd‘s experimental branch of rtl-sdr with additional features and the mutability branch – allows direct sampling without a hardware mod – “very experimental – … [Read more…]
Kalibrate-rtl is a program that can scan for GSM base stations and use them to calculate the local oscillator frequency offset (ppm error) of an RTL2832 USB dongle. I finally got this to build after a lot of trial and error with MSYS/MinGW. As often, not that complicated, just a case of building the libraries … [Read more…]
rtl_433 (https://github.com/merbanan/rtl_433) is a program that allows you to use an RTL2832 based USB DVB device as a generic receiver for 433 MHz devices (temperature sensors, weather stations etc). Here you will find my unofficial Windows 32/64 bit builds compiled using MinGW. For my librtlsdr builds go here. UPDATE 13/04/2016 – fixes a problem with … [Read more…]
I like monitoring/graphing data, so I picked up this $10 TEMPer v1 USB thermometer from China for a DIY weather station. It is currently measuring the temperature outside my window. The device is detected out of the box in Ubuntu Linux: [89921.774619] input: RDing TEMPer1V1.4 as /devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1.1/1-1.1:1.0/input/input18 [89921.775505] hid-generic 0003:0C45:7401.0009: input,hidraw0: USB HID v1.10 Keyboard … [Read more…]
A Geiger Counter is perhaps the ultimate geek toy, but the price of commercial devices such as the Gamma Scout have always been too high for me. Recently prices have been coming down as Fukushima mania subsides and sellers dump excess stock. A number of DIY kits have also appeared, tying in with the Raspberry … [Read more…]
Living in an area with an unreliable power supply I use a Zigor Ebro 650 UPS to keep my Wifi and internet connection up during power cuts. This is a low cost battery backup which can power a Wifi router and ADSL modem for around 5-6 hours. The Buffalo router is running Gargoyle firmware so … [Read more…]
Occasionally it may be necessary to install a package manually on Gargoyle/OpenWrt firmwares due to bugs or incompatibilities preventing automatic installation. Here’s how to do it.
After switching my NAS box to Ubuntu Server I decided I wanted a way of monitoring the system remotely from a browser. Previously I had used MRTG but being short on time wanted something more “plug and play”. The box only has 512MB memory so resource usage is important. The solution I chose is a … [Read more…]
A minor annoyance on Ubuntu is the tendency to spin up sleeping hard disks on login. It turns out that the culprit is a script update-motd-fsck-at-reboot which queries all the drives and tells you if any of them are scheduled to be checked next reboot.