High security key fob project

This project is about creating a high-security keyfob using Atmel’s ATSHA204 hardware authentication device. It was inspired by this post about security and signing. Many modern key fobs use various security techniques to prevent replay attacks, yet it turns out it is possible to hack even rolling codes. To solve this problem and have a key fob…

BBoilRF

This blog post is about a project I have been working on lately, the BBoilRF. It is a general purpose internet-connected relay actuator/gateway with support for low power, battery operated remote wireless sensor nodes. It was designed primarily for use as a thermostat with an option for wireless temperature sensors capability, but is highly configurable…

proSmart

I have been busy starting up an exciting new project the last few months, a joint effort with a team of highly enthusiastic, hands-on, broadly skilled contributors with the goal to design and develop IoT home/industrial automation solutions. Together, we established a company named proSmart with the following principles in mind: Provide end-to-end services Complete service…

Auto DST adjustment

We are close to that time of the year when Daylight Saving Time (DST) starts.  It is intended to save on energy use, however, studies have found this to be questionable, even contrary – energy use increases in some cases. The change itself causes a number of inconveniences. For me DST start/end means adjusting a number of clocks around…

ESP32

I’m one of the lucky 200 that got their hands on the early beta of Espressif’s new ESP32 chip evaluation board. It is the “big brother” to the popular ESP8266, Espressif has though noted that it should not be treated as an ESP8266 replacement and that it is targeting “different market”. The specs are impressive indeed,…

Spectrum analysis with RFM12B

The comments to my last blog post got me thinking if I had chosen the right RFM channel at home, obviously if the channel is noisy that directly affects reception and increases the error rates. I use the default 868Mhz setting for the RFM12B/RFM69s at home and decided to check if the channel is clear from other…

RFM69 to MQTT gateway using ESP8266

I’ve mentioned my plans for this project during the IoT hangout session few months ago, it has finally materialized as working prototype. The blocker so far was the lack of ESP8266 RFM69 driver and free time on my end, so I’ve teamed up with Andrey Balarev to solve this. Andrey is an IoT enthusiast + embedded systems…

Local hostname for connected devices

Now that we have connected our project to the local network, we are immediately faced with another challenge: how can we reach it? Using WPS/SmartConfig means we force the unit into DHCP settings mode, IP address is auto assigned by the router in that case. You may not have access to the router’s settings to force static IP…

The initial setup problem

The typical end-user of your IoT products wants them up and running fast, with minimum hassle once they bring them home. They don’t want to be presented with initial configuration mechanisms/options they don’t understand, and their enthusiasm quickly diminishes if you make them struggle to get the product going. Page views: 2894