WiFi PIR Sensor

What IoT (“internet of things”) setup would be complete without the wireless PIR (passive infrared) motion sensor? And anyway, at this pace of ESP8266 projects, soon everything in my house will have an IP address. This sensor is the next in a series, intended to fulfill a purpose, provide a general template for device-to-internet communication, and aid in me figuring …

A notch filter to detect a smoke alarm

Here’s another class project from this past spring semester, this time from Introduction to Circuit Analysis class. Background: There are already devices that detect a smoke detector beeping and do something with it. These range from inexpensive (Life+Gear Fire Safety Night Light, $8) to capitalize-on-the-disabled expensive (SafeAwake Fire Alarm Aid with Bed Shaker, $250), and all rely on a similar …

Exporting a gmusicbrowser queue

I was looking to brush up on my C and C++ skills and become acquainted with the GNU GCC compiler, and this was one of the first topics I chose. The idea is, take the queue of songs from gmusicbrowser and write a shell script to copy each music file to the current directory, prepending the number position in queue …

3D printing a charging cradle for a Sony Xperia Z

This is a recap of a term project of sorts in Solidworks class last spring. We had to pick something to design (printing it was optional). My latest smart phone is a Sony Xperia Z, a cheap enough out-of-pocket expense to replace a cracked Nexus 4. The new phone is water-resistant, but I found pulling the cover off the charging …

Appearances can be deceiving - this alarm clock has an IP address.

Adding WiFi to an alarm clock for the hearing impaired

Introduction: The ClearSounds SW200 (motto: “shakeup to wakeup”) is an $80 alarm clock designed for those of us with hearing loss. It has hearing impairment-friendly features such as the ability to flash lights, an adjustable-frequency tone, and a bed shaker. I’ve found the bed shaker is really effective – even when I had perfect hearing, the loudest screeching alarm sometimes …

ESP8266 Arduino SMTP Server part 3

This is a continuation of part 2, and expands to use the solution developed in this post, along with the latest findings about the specific DVR I’m using. After creating the linux service described in one of the above links – which received a packet and plays a doorbell sound – the ESP server was modified to relay this signal.

UDP answerer and notifier

Goal: On receiving a packet, pause the music and play a notification sound. Background: When I have headphones on, I am oblivious to someone at the door, or other potential things that are good to be aware of. Being able to accept a usable network signal and turning it into a noticeable alarm would be useful to use in certain …