Monthly Archives: February 2019

Hacking Unknown 2 Channel Relay With Tasmota

In my quest for the perfect low voltage or dry contact garage door relay I stumbled across this one that I found on Amazon

Seems like it might have been made by ITead because it came programmed with EWELink software.  Having said that I cannot find it on their website and I also thought it might be a Sonoff brand name.   I still think it is ITead but I just can’t prove it.

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Sonoff SV for Garage Door Opener

I was using a Sonoff 4 Channel Pro relay in my “Smart Garage Door” project however it was big time overkill.  I only need one relay to pull this off.   In addition to this I was using a NodeMCU ESP8266 to act separately as the garage door sensor.   So in essence I had:

  • Spare Remote Control (for Security 2.0 garage door opener)
  • Sonoff 4 Channel Pro Relay
  • NodeMCU ESP8266 Chip for Door sensor

Now I have

  • Spare Remote Control
  • Sonoff SV

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Flashing Single Channel Inching Relay (Sonoff?) With Tasmota

Decided to put a smaller, single channel relay in my Garage Door project. I ordered what I believe is an ITead Sonoff Inching Relay.

This module is preloaded with software and you can use an iPhone to trigger the relay using an app called EweLink

Basically you start the chip up, connect to its WiFi network and configure it to yours.

 

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IPsec VPN on pfSense to replace OpenVPN Connect on IOS

My OpenVPN Connect app on my iPhone just quit working.  This is how I kicked its ass.

I have been a big fan of Virtual Private Networks for YEARS.  If you are on an untrusted connection such as Airport or Hotel or Coffee Shop the safe play is to connect to a VPN which encrypts your communications in a tunnel between your computer and your VPN server.  It wildly increases security.

So for years I have run an OpenVPN server on my hardwire firewall which runs an OS called pfSense.   If you have any inkling of security at all you should run a hardware firewall.  But that is a discussion for another day.  Anyway pfSense has an easy configuration for OpenVPN with a client export feature that is second to none.

However, the IOS OpenVPN app JUST QUIT WORKING.  I can connect to my VPN but traffic doesn’t seem to move.  I can’t do anything with it at all.  So I hit the OpenVPN IOS forum and sure enough……..this is a thing.  Since October 2018 as well!  To confirm this is the problem I can connect to my OpenVPN server JUST FINE with my iPads which have the older app.

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Making a simple door sensor from ESP8266

You see all these Home Security systems being advertised all the time and they all have one gotcha.  Some kind of charge every month.  Why not just make your own?  Also it costs PENNIES on the dollar compared to some of those others.

One of the biggest components of home security is knowing the state of windows and doors. And that is very simple to obtain and with INEXPENSIVE hardware.  This guy is the backbone to this project:

This is a NodeMCU ESP8266 Internet of Things (IoT) chip.  Translation:  It’s a little teeny tiny small board computer with a wifi antenna on it.

You can get ESP8266 devices WAY cheaper than this even though this guy only costs $9 or so.   A couple of things I like about it are that it has a Micro USB input connector on it and the legs are already soldered on.

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