Creating things with the Glowforge Laser is pretty cool. Showing a time-lapse video of that process is even cooler! Perfect for showing off with YouTube, Instagram, or Facebook.
In this post:
Template for perfect alignment
Cover to block glare & reflections
Instructions for mounting
Instructions for cable management
Recommended camera settings
Zip file containing positioning template SVG, cover SVG, Instruction PDF, and recommended Wyze Cam settings PDF
Made of laser cut sheet stock using tab and slot construction. No glue required, gravity and friction keep slots secure. Hole on top for phone to sit on and take picture through.
My wife and I are new parents. We have an older GE Eterna dryer with a buzzer that can wake the dead. Home automation is all fun and games until you can use it to make major annoyances go away, then it’s no longer a frivolous hobby!
Wouldn’t it be cool if you could monitor your electricity usage with OpenHAB for less than 20 bucks with the same accuracy your power company uses for billing?
Using an inexpensive rtl-sdr dongle, it’s possible to listen for signals from ERT compatible smart meters using rtlamr. This script runs as a daemon, launches rtl_tcp and rtlamr, and parses the output from rtlamr. If this matches your meter, it will push the data into OpenHAB using the REST API.
Turns out these ERT meters (at least in Omaha) are broadcasting 4 hours of usage data with 5 minute resolution. It broadcasts this data every minute, repeating the previous broadcast until the next 5 minute interval has completed. This data is flying around unprotected. Using free software and an inexpensive SDR dongle it’s possible to pull this data into OpenHAB.
rtlamr does all the heavy lifting here. It listens for the data, decodes, and passes along the meter readings.
On my meter, the interesting information is just above the readout. That’s my meter’s type and endpoint ID or serial number. I’ve blurred my details for privacy.
Wouldn’t it be cool to control an android device’s wake and sleep from OpenHAB? I’ve strapped a couple tablets to the wall with command strips. I’m using them to control OpenHAB. Gotta get ’em working well enough to gain wife approval before doing anything more permanent.
I was griping about turning my tablet screens on and off in response to sensor triggers in my home automation system. My first attempt using Tasker to poll the OpenHAB Rest API was too laggy to be useful. I wasn’t making much progress when my buddy over at https://opsech.io told me about adb and sending keyevents using adb shell. He ninja’d up tabletcontrol.sh and it works beautifully. Following his example, I munged out gettabstatus.sh and it works well enough.
Requirements-Tablet:
Rooted Android device WiFi ADB – Debug Over Air
NOTE: This app works on ROOTED devices only.
Requirements-Server:
OpenHAB Server & exec binding, tested on 1.8
linux/bash, tested on Ubuntu Server 14.04 LTS
android tools ADB
[text]sudo apt-get install android-tools-adb[/text]