Sharing some thoughts on using mTLS (mutual TLS authentication) to secure IoT solutions in a blog post: https://harizanov.com/2019/06/using-mtls-to-secure-iot-solutions/
mTLS to secure IoT solutions
Using mTLS to secure IoT solutions
While delivering on the promise of streamlined efficiencies and operational insights, smart IoT devices also present a new and more widespread threat to users and personal data. No one really needs reminding of the security implications of IoT. Think of…
30 active IoT devices at home
Counted 30 active IoT devices at home, 90% of them created by me. What's your count?
Run a C Language Interpreter on Your ESP32
This is pretty interesting: Run a C Language Interpreter on Your ESP32 https://www.codeproject.com/Articles/5061494/Run-a-C-Language-Interpreter-on-Your-ESP32
MQTT certificate based mutual authentication
Implemented #MQTT certificate based mutual authentication for my home automation with access policies for publish/subscribe, much like Amazon AWS #IoT, only #DIY . It is now much more secure #esp32 #mosca Added certificate revocation list functionality. Took extra effort to make it work without MQTT broker restart. Next is profivioning API for the nodes
ESP32-S2 secure Wi-Fi MCU
@EspressifSystem I'd love to get my hands on the #ESP32-S2 , count me in for a tester https://www.espressif.com/en/news/espressif-announces-%E2%80%A8esp32-s2-secure-wi-fi-mcu
Come see me
Come see me #security #infosec #passwords
DIY sliding door opener
A short video blog post of my DIY sliding door #Iot opener https://harizanov.com/2019/05/iot-sliding-door-opener/ https://youtu.be/BPzyOmaaLY0 #esp8266 #DIY #MQTT #smarthome #homeautomation
IoT sliding door opener
My front gate has joined the Internet of Things and is now controllable from my phone. The sliding door opener is a Beninca BULL 5M. The project is DIY, based on ESP8266 + MQTT and I can now open/close/read the…
The Dunning-Kruger effect
The Dunning-Kruger effect is a real thing, I get a reminder every now and then
Demo of pairing a remote wireless sensor
Demo of pairing a remote wireless sensor, RFM69 based, with main control hub https://youtu.be/r7twp9cV2z4 #IoT #ESP32 #rfm69 #homeautomation
Self-made esp8266 gate controller
Installed a self-made esp8266 gate controller with magnetic switch status sensor, I can now open/close/read the statate of the gate from anywhere. #IoT #esp8266
Pull-ups on I2C lines
Forgot to add pull-ups on I2C lines, retrofitted resistors save the day
2.4GHz vs 433MHz range tester
Wrote a 2.4GHz vs 433MHz range tester: sending espnow 2.4GHz and RFM69 @ 433MHz from master to a slave node. 433MHz range is much better from what I can see but I am comparing apples to pears here..
Touch GUI to control my paradox home alarm
Working on touch GUI to control my paradox home alarm
Human-Machine Interface (HMI) modeling and implementation
New post: Human-Machine Interface (HMI) modeling and implementation using event-driven finite-state machines https://wp.me/pawL3e-1i8
Human-Machine Interface (HMI) modeling and implementation using event-driven finite-state machines
Modern HMIs are built as graphical user interfaces (GUI) with touch-based user interaction. Complex HMI development is always challenging because of the dynamic nature of the required behavior, underlying functions, and graphical design. Building a PoC prototype through code is time-consuming,…
3.5″ TFT
New post: Experimenting with a 3.5″ TFT https://wp.me/pawL3e-1hq
Experimenting with a 3.5″ TFT
I decided to test a 3.5″ TFT version of the TFT32 project as the original version’s 2.4″ 320×240 TFT is a bit small-ish. The TFT I chose is an ILI9488 480×320 3.5″ with resistive touch. The upgrade was pretty straightforward,…
Testing ILI9488 3.5″ TFT clocked @ 40Mhz
Testing ILI9488 3.5" TFT clocked @ 40Mhz in 4 wire SPI mode with DMA, looks pretty responsive. #LittlevGL #ESP32 https://youtu.be/HVVAo9QdOfM
ESP32 + 480*320 ILI9488 TFT with touch + LORA
It lives! #esp32 + 480*320 ILI9488 #TFT with touch + #LORA (not yet populated on the PCB) + RTC + piezo buzzer
Hand soldering 40 pin 0.5mm pitch FPC
Hand soldering 40 pin 0.5mm pitch FPC isn't my favorite thing to do, but here it is
Automated GUI load tests
Running automated GUI load tests, found couple memory leaks that were otherwise slipping
Excellent free guide by Michael Barr
I have some reading to do for tonight, excellent free guide by Michael Barr
Prototype PCBs for ESP32 3.5″ TFT IoT control hub
Prototype PCBs for ESP32 3.5" TFT IoT control hub project
People-Tools-Processes
New post: People-Tools-Processes https://wp.me/pawL3e-1hk
People-Tools-Processes
As an IT team manager, I am responsible for forming highly engaged and efficient teams. Building an agile team requires a fine balance of skilled and motivated people, fine-tuned processes and proper tool selection.Put too much focus on people and…
Done is better than perfect
Reminder to self: done is better than perfect.
Real-time 3D rendering on ESP32
Toying with real-time 3D rendering on ESP32, adapted @elect_gombe 's code to my hardware setup
My solar water heater (220l) reached 79*C
My solar water heater (220l) reached 79*C yesterday #summeriscomming
Tech talk #3
New post: http://DEV.BG tech talk #3 https://wp.me/pawL3e-1gi
DEV.BG tech talk #3
I did a tech talk about my ESP32 based IoT control hub project on Feb 5th, 2019 at Work & Share Coworking Space Sofia. Over 100 people signed up for the event organized by DEV.BG, it was a pleasant surprise…