Arduino, Hardware

Arduino Leonardo (ATMega32u4) USB Power Button

Project Introduction For fun I made this USB power button with an Arduino Micro/Leonardo-like board (by which I mean one using the Atmel ATMega32u4 MCU with USB controller). The project details are below in case you should want to read or watch how I did it. I used an ATMega32U “arduino”-like board from Amazon.com although…
Hardware, Raspberry Pi

Raspberry Pi RTS / CTS Flow Control

I had need of a 3.3v TTL serial interface to reprogram a device I was working on. Looking around I realized I had mostly 5v logic USB to serial adapters. I figured the Raspberry Pi would work well enough, but I also needed hardware flow control. As it turned out the Pi can do RTS…
Telephony

Elastix *69 (Call Trace) Fix

We’re running an older installation of Elastix at my office, version 2.0.0 (release 58) on top of freePBX version 2.7.0 (release 10). The call trace feature was bothering me. This feature is mapped to the *69 feature code as is common with many LECs in North America. In the default implementation you hear an announcement…
Telephony

Install Certified Asterisk 13 from source on Ubuntu 14.04 LTS

Need an Asterisk setup? Why not combine the long term support of an Ubuntu LTS release with the long term support of a Certified Asterisk release? Certified Asterisk releases are supported for around 4 years, and Ubuntu LTS for around 5 years, helping ensure you don’t need to mess around with major reconfiguration again for…
Telephony

YAC Caller ID Server for Asterisk

I recently upgraded the firmware of the IP phones in a small office using my Grandstream HTTP configuration pusher. One of the users complained that the Caller ID display under the new firmware was too small to be legible. I’m not convinced that the size of the font actually changed, but I wanted to offer…
Arduino, Hardware, Raspberry Pi

Santa Hatifyer v1.0

Well, it’s Christmas time again. I really haven’t had a lot of blog posts since last Christmas, so my 2013 desk-decorations (deskorations?) are still fresh on my mind. I cheated this year, and didn’t stick to stuff I had on hand (although at the core is a Raspberry Pi, which the office had available). I…