Checking an AWS IoT pricing calculator, running a 10K IoT fleet costs $1.8K per year. This is not insignificant. Link to the calculator: https://d1.awsstatic.com/IoT/assets/AWS_IoT_Core_Pricing_Calculator.fcc37410fa03431c28b59d8509f1b4e370c88402.xlsx
Secured my #Node-RED with mutual TLS authentication through my own CA and self-generated certificates; I have to present a client certificate in order to be allowed to use Node-RED.
My dog meets Google's AR tiger in the garden.. try it yourself, google for "tiger" on your phone, then "view in 3D"->"view in your space"
I need a node.js guru volunteer to work with me on creating basic PKI PoC that provisions #ESP32 devices with client certificates; node-forge looks right for the purpose. I have the complete solution architecture figured, just need a node.js guru that can code it for free 🙂 Couple volunteers already, thanks @eliofilipe and @MrQinEL ;…
I now load x.509 certificates to dedicated ESP32 partitions rather embedding into the code via COMPONENT_EMBED_TXTFILES; This helps decouple the code from provisioning the device with CA and client certificate+key; Still working on PKI to provision the certificates at flash time
Saw someone drop his wallet while entering a shop (pretty full with cash btw) and ran up to him to return it. Feels good to help, I have been in a position where I've lost wallet with IDs, credit cards and know what it means..
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/
Notes on securing IoT devices with mutual TLS (mTLS) – what it adds over one-way SSL and how I apply it in my own projects.
Counted 30 active IoT devices at home, 90% of them created by me. What's your count?
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
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
@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 #security #infosec #passwords
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
My Beninca BULL 5M sliding gate is now on the IoT – ESP8266 + MQTT lets me open, close and check the gate state from my phone.
The Dunning-Kruger effect is a real thing, I get a reminder every now and then
Demo of pairing a remote wireless sensor, RFM69 based, with main control hub https://youtu.be/r7twp9cV2z4 #IoT #ESP32 #rfm69 #homeautomation
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
Forgot to add pull-ups on I2C lines, retrofitted resistors save the day
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..
Working on touch GUI to control my paradox home alarm
Modeling touch HMIs as event-driven finite-state machines instead of coding prototypes by hand – my approach to GUI behavior design.
New post: Human-Machine Interface (HMI) modeling and implementation using event-driven finite-state machines https://wp.me/pawL3e-1i8
Testing the TFT32 ESP32 project on a 3.5″ ILI9488 480×320 resistive touch TFT – mostly a matter of adapting the display drivers.
New post: Experimenting with a 3.5″ TFT https://wp.me/pawL3e-1hq
Testing ILI9488 3.5" TFT clocked @ 40Mhz in 4 wire SPI mode with DMA, looks pretty responsive. #LittlevGL #ESP32 https://youtu.be/HVVAo9QdOfM
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 isn't my favorite thing to do, but here it is
Running automated GUI load tests, found couple memory leaks that were otherwise slipping
I have some reading to do for tonight, excellent free guide by Michael Barr
Prototype PCBs for ESP32 3.5" TFT IoT control hub project
People, tools and processes – balancing the three as an IT team manager, and what happens to the team when one of them is neglected.