Tag Archives: Project

Cost-Reducing the Lunar Clock: IoT really is here

I have to confess that sometimes I need a push to make the right design choice.

It’s been a long time – way too long – since I worked on my Lunar Clock project. In the meantime, Sparkfun has introduced new, inexpensive microcontrollers aimed at Internet-of-Things applications. I knew one of those new microcontrollers would be perfect for the Lunar Clock, but I dragged my feet.

Continue reading Cost-Reducing the Lunar Clock: IoT really is here

Dog Water Bowl Scale, Part 3: Final assembly and installation

In my previous post, I covered the mechanical construction of the scale. In this post, I finish assembling the scale, calibrating it, and installing it.

After painting I put feet on the scale so it won’t soak in water spilled on the floor.

Adding feet to the scale
Adding feet to the scale

…then bolted the Arduino 101, Load Cell, and Load Cell Amplifier to the bottom plate. Continue reading Dog Water Bowl Scale, Part 3: Final assembly and installation

Dog Water Bowl Scale, part 1: initial design work

Now that my Dog Bed Weight Scale is sending data, I’m going to have a go at a water bowl scale. The idea is that, like the bed, the bowl will periodically send its weight to a cloud. This data should tell me when Pippa drinks, when we refill her bowl, and (maybe) how much she drinks.

The work-in-progress sources on Github, contain the beginnings of the Arduino 101 Sketch, Bill of Materials (Parts List), mechanical design/construction details, and a day-by-day project diary. Continue reading Dog Water Bowl Scale, part 1: initial design work

Dog Weight Scale part 16: Data!

In my previous post I changed the uploader app to run when the Raspberry Pi turns on, and installed the scale under Pippa’s dog bed. In this post, I get interesting data from the scale.

The scale has been running for a little over a week now, and has been surprisingly reliable for a first version. There is some sort of bug in which, every few days, the scale stops supplying new data BLE notifications to the gateway. I plan to refactor the scale and gateway to avoid that, but that’s another post.

Today I looked at the data and saw some very interesting things. Continue reading Dog Weight Scale part 16: Data!

Dog Weight Scale part 15: scale is installed and uploading real data

In my previous post, I wrote the Raspberry Pi Node.js code to upload data from Pippa’s dog bed scale to data.sparkfun.com. This post covers how to make a Node.js program run automatically when the Pi is turned on. Oh, and at the end I installed the finished scale under Pippa’s bed.

Pippa, her bed, and the scale underneath
Pippa, her bed, and the scale underneath

Continue reading Dog Weight Scale part 15: scale is installed and uploading real data

Dog Weight Scale part 14: uploading data to data.sparkfun.com

In my previous post I finished the hardware for the scale and calibrated it. This post covers getting data from the scale to Sparkfun’s Data Warehouse.

By the way, the nRF Master Control Panel (BLE) from Nordic is the perfect tool for debugging Bluetooth Low Energy devices and messages.  It understands a pile of standard Bluetooth data types,as well as the Physical Web, so it’s a quick way to find out whether your Arduino project is sending the right data. Continue reading Dog Weight Scale part 14: uploading data to data.sparkfun.com