Graves On SOHO Technology

Shelly Sensors: Exposing my data addiction

If there’s one thing that I’ve learned from my use of Home Assistant it’s that data is addictive. In creating a strategy for whole home backup power, I selected the Shelly 3EM as a tool to track how much power the house draws. That provided a solid information to help in choosing a generator. It also started me down a path with inexpensive Shelly sensors.

When I later added a generator inlet to our garage, I opted for the newer Shelly Pro EM 50A. The new “Pro” models supports three kinds of connectivity; Wi-Fi, BT and Ethernet.

Dealing with Netatmo Sensor Issues: A Personal Experience

We’ve had a Netatmo Smart Weather Station since 2017. As I recall, it was gift. We have the basic system, with two additional room sensors. We added the rain gauge in 2019. It was readily integrated into Home Assistant. For an IoT device, it’s worked very well. That is, until very recently.

Back in June we had an incident involving the large Pecan tree in our back yard. After an extended rainy spell, it lost a major limb, which came down onto our deck and the roof of the house. The roof was damaged in two places. The deck was destroyed. The remainder of the Pecan had to be taken out completely.

Is there a MiniDisc Revival?

I loved the Sony MiniDisc! In the mid-90s I had some MiniDisc gear. So when I recently heard rumor of a MiniDisc revival, I was interested.

To get started in MiniDisc, I bought a starter set known as MD Bundle 4. I bought this in the summer of 1996, at the The Sony Store at Premium Outlet Mall in Grove City, PA just north of Pittsburgh. At the time, I was working a large project at KDKA-TV2 in Pittsburgh. That project saw me driving between Toronto and Pittsburgh repeatedly over a period of several months.

The bundle included a Sony MDS-JE510 recorder and an MZ-E40 portable player. I also bought the brand new Sony MDR-NC10 noise cancelling earbuds.

Stormy Weather: An observation of POE Budget

Late the other afternoon we had a thunderstorm come through. Tis the season hereabouts. The wind picked up, pushing in dark clouds. The sky darkened quickly. Then the Unifi app on my Pixel 8 pinged to alert me to a network error. The network switch in our attic had exceeded its power-over-Ethernet (P.O.E.) budget.

What a novel set of events I thought. It was the first time I’d ever seen such a notification. I wonder why it occurred? It didn’t take long to work it out.

The device reporting the power problem is a Unifi USW Flex 5-port switch that lives in the attic. It receives power from the USW-24-POE main switch in the house. The POE+ (aka 802.11at) ports on the main switch can deliver up to 30 Watts over a single Ethernet cable. That is, up to its overall power budget of 95 Watts.

USW Flex can deliver up to 46 Watts when powered from a POE++ (aka 802.11bt) capable switch. When powered from mere POE+ the USW Flex is able to provide 20 Watts onward to network loads.

Breaking up with Evernote

I recently received an email notification of pending changes to my Evernote account. They tell me that my existing “Pro” account (most recently billed at $138.57/yr) will soon transition to their new “Advanced” account type with an annual cost of $249 a year. That simply won’t do. Evernote does not deliver me that much value, so I am considering my options.

Looking into the account history, I see that I have been using Evernote since 2010! Back then, I wanted a place to store notes, mostly text, that would be available no matter where I was, or what device I was using. I’d use it to store configuration data for customer equipment when I was working on site. I had Dropbox for storing and sharing files. Evernote was for writing, configurations and that sort of thing.

Over the years I’ve accumulated a lot of notes. Over 1,000 in about 36 notebooks. Sometimes I use the web clipping function to capture a web page, or a JPEG image. But mostly it’s just text notes and lists.

Deal Alert: Wen Parallel Kit Delivers 240v 50A (12 kW) for Household Backup Power

It was two years ago, after the crazy derecho and Hurricane Beryl that I did a deep dive into an affordable approach to whole home backup power. That effort documented our own strategy, which involves a Predator 9500, which is large portable inverter. This is in contrast to expensive, installed backup generators from Generac or similar.

Since then, I remain active in various online forums on related subjects. A question that often comes up involves connecting a pair of inverters in parallel to deliver more power. This comes up enough that I wrote an overview of parallel kits for the Predator 9500 and similar inverters.

In doing that I discovered that these parallel kits were in short supply. Some companies like Harbor Freight, simply don’t offer them. Duromax does, but was sold out for the longest time. So, I was happy to find that Wen has an attractive offer that’s currently on sale for just $62.