Decided to put an attic fan in over the garage and tried to find a “smart” one.  Sure enough Quietcool makes them and even better they have an ESP32 wifi chip in them which can be flashed with Tasmota.

ESP32

This means the fan can be controlled locally with Home Assistant and doesn’t need a separate app to control it.

Also while having an attic fan being smart it doesn’t need to be super smart.  You want them to come on at a certain temp and go off at a certain temp.

The manufacturers app has too much going on in my opinion.  And with these apps you just have no idea what they are up to.

The only person who has any business knowing my attic fan is on or off is ME.  Not QuietCool, not Google, just me.

DISCLAIMER:  This is not my work. I was walked through this by user kwikSi1ver on the Digiblur Discord discussion group.  I am only documenting this for posterity and re-creation purposes.  Again, I claim no credit for this.

Flashing with Tasmota is really no issue.  I can do that.  The magic and genius behind this is the reverse engineering.  Telling what relay to do what.  Making sure both relays don’t come on at the same time.  Making sure the power LED comes on.  Making sure all the sensors are recognized and spew out the right information and are DISCOVERABLE.

Yep, anyone can flash Tasmota.  The guys who reverse engineer stuff get all the credit.  But first ya gotta flash it.  But first lets back up the manufactures firmware in case something goes wrong.

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Kauf Smart Bulb

So you go to Walmart or something and see a smart light bulb. You bring said smart light bulb home and stick it in a lamp.  At this point you realize you have to:

1. Download an app
2. Create an account

This never goes well.  But you get it working.  And it’s cool.  But the app is probably harvesting your contacts list, wants access to your camera to scan a QR code, etc, etc, etc.

It’s crazy.  And it isn’t good for network security or your personal privacy.  I am NOT saying all smart devices are evil and do bad stuff but I am saying that a light bulb exposed to the entire internet is a bad thing.

I run a hardware firewall.  I can clear the active log and within SECONDS and I mean SECONDS there are all kinds of exploits being blocked by my firewall.   There are bots out there continually trying things over ranges of IP addresses.

Remember all the old movies where the skull and crossbones comes up and you knew you were hacked?  It isn’t like that.  The bad guys don’t want you to know they are using your computer for a bot to carry out their attacks, or trying to harvest your SSN or credit card numbers or bank passwords.

Anyway, that’s enough of that.  This is about the Kauf Smart Light Bulb.  They go for about $15 which is steep for a light bulb but cheap for a SMART light bulb.  Not a bad deal at all.

The best part of this bulb is that it comes pre-flashed with ESPHome.

NOTE: THIS BULB IS VERY SPECIFIC IN THAT YOU NEED HOME ASSISTANT HOME AUTOMATION SOFTWARE TO USE IT. AT LEAST WITH ESPHOME ON IT.  ONCE YOU FLASH IT TO TASMOTA YOU CAN CONTROL IT VIA A WEB BROWSER IF YOU GO TO THE LIGHT BULBS IP ADDRESS.  THIS BULB IS FOR GEEKS ONLY!  DON’T JUST BUY ONE IF YOU DON’T KNOW HOW TO DO THIS STUFF.

If you do know how to do this stuff……….keep reading.

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Go in any big box store and you’ll find dozens of smart home appliances.  Light bulbs, security cameras, smart outlets, smart switches, LED strip lights, etc.   There is no end to it.

So you buy something.  Then you have to download the app, and create an account and then you wow your friends by demonstrating how smart your home is becoming.   Then you buy another device which means you need another app and another login account.  Then you do it again and again and again.

Pretty soon your phone is full of apps and you can’t remember the passwords to all the new accounts you have.

Is it really convenient?  There are ways to get all those devices under one roof so to speak with home automation software but this blog isn’t about that.   It’s about your security.

All those devices are connected to the INTERNET, aka “The Cloud”.  You don’t know who wrote the app.  You don’t know if the app has gaping security holes or intentional malware.  Also you grant network access to that device.   Also when you fill in the app you provide your network credentials to the app.  Do you use your wifi password with any other account anywhere?  Does the app writer transmit your credentials back to their server?

In 2016 there was an exploit on Internet of Things (IoT) cameras and routers called the Mirai Bot Attack.  The attacker focused a Denial of Service (DDoS) attack using HUNDREDS OF THOUSANDS OF DEVICES.  That kind of implies that in 2016 there sure were a lot of infected Internet of Things devices.  Wonder what that statistic looks like in late 2021.  Better?  Worse?  My educated guess = WORSE.

How can you make it better and more secure?

Get Off The Cloud.

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This is one tiny camera.  Maybe a bit too tiny.

ESP32-CAM

For some perspective, the breakout board next to the ESP32-CAM has a Micro USB charger on the end of it like you would use to charge your phone.

The whole camera board isn’t a lot larger than a quarter.  A bit taller though.

But look at the camera lens itself.  It’s roughly the size of the USB connector on that green board.

You could put this cam anywhere there was a tiny hole.  Look around your room or even worse, YOUR HOTEL ROOM, and think of all the places a tiny camera could be.

Comparatively, look at the screen on your smart phone and look at the camera lens.  On a day to day basis YOU DON’T EVEN NOTICE IT, DO YOU?

Anyway, I’m not trying to creep you out but I am pointing out that it is easy for ANYONE to build a tiny spy camera or security camera.  This thing will live stream as well.  Let’s check it out!

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I have decided to try some Shelly Home Automation products and stumbled across the Shelly Flood Sensor.

Shelly Flood Sensor

Very cool little device and I while I won’t repeat the specs because you can look all that up at the link above I will tell you what I think is good about the device and what I think is bad about it.

Having a water sensor is pretty important in my estimation. While I’ve never had a pipe burst I did work with a guy once who deployed overseas for several months and his ice maker hose ruptured right after he left and leaked for MONTHS!

So I’m going to get several more of these now that I’ve worked through the installation of one of them. I intend to place them by the ice maker hose, the washing machine, under the sinks, in the hot water heater pan, and in the A/C secondary pan.

First I’ll start with what is bad about this thing.  And I’ll pull no punches.

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Sonoff iFan04

Introducing the Sonoff iFan04. In MOST cases you WILL NOT need one of these, however, if you have an older home where your ceiling fan and light are wired to a single wall switch and you have to control the fan by pulling on the chain………..then you need one of these.

If you have two switches it is WAY easier to buy smart wall switches.  One for a 3 speed fan and one for a regular switch.

Note, that I didn’t say it was cheaper to buy 2 smart switches.  It is EASIER to install the switches though.

The iFan04’s are about $18 each.  That is a bargain.

One real big limitation of the iFan is that it is, errrrr…….big.  Meaning you have to have space to install it in your fan.  The first fan I tried to install this on in my house………….there was just no way.  The ceiling baseplate cover was just too small with absolutely no room to install it.  I would literally need a whole new ceiling fan before I could make it work.

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I generally like most tech I review.  I have mixed emotions here but this may be a cluster f*** of my own making.

I dig home automation.  There is nothing better than asking a smart device to turn on a light or a fan or effect lighting or play a song …………and it works.

I’m a long time user of HomeAssistant .  It was kind of hard in the beginning but it is super smart and more intuitive now. Again, you don’t have to go off the deep end.  Turning a light on and off or hooking up to your thermostat can be huge.

I’m a big fan of taking Internet of Things (IoT) devices and flashing them with open source firmware such as Tasmota.  And my house was AWESOME.  But then I moved and I had to start all over.  ESP8266 is kind of slowly being phased out by ESP32 chips and Sonoff devices have some competition now such as Shelly.  I had seen the Shelly 1 a couple years back but opted to stick with Sonoff devices.   Fast forward a couple years and Shelly has really advanced.  They have some cool offerings and I decided to give them a trial run.

So since I’m starting over I grabbed some Shelly devices.  The internet bubbas love them. But I wonder if they have ever deployed them other than in lab conditions for a YouTube video because I had a hell of a time with my first installation.

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The subject line is “Add a temperature sensor to a wifi chip”.  Why would you want to do that?  I can think of a few reasons.

• Know what the temperature is in the attic and also use the chip to control an attic fan.
• Know what the temperature of the hot tub water is and have it send you temp alerts if the water starts getting cold, or even worse, too hot.
• Know the dew point which is vital when using a laser engraver which has a water cooled laser tube.  Too much condensation means you’ll shorten the life expectancy or the tube or cause it to catastrophically fail.
• Have a remote temp sensor for other rooms.
• Monitor humidity where you store important papers, or cigars or stuff like that.

Now that we know it is useful, let’s do it.   This is actually one of the simplest things you can do with an ESP8266 or ESP32 Internet of Things, wifi chip.   It isn’t hard at all.
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