Category Archives: Internet of Things and M2M

OpenWrt, an alternative for improving network security at home with firewall and web proxy

Introduction OpenWrt is a Linux distribution that can be loaded into many wireless routers by replacing the original firmware with OpenWrt firmware. The picture below shows 2 such routers, together with Raspberry Pi on the right for comparison. My interest … Continue reading

Posted in Anvanced Tools, Cybersecurity, DIY, For Fun or Interest, Hobbies and Other Interests, Internet of Things and M2M, Network Monitoring, Recommended Free Tools, Security Training, Awareness and Reports, Tips, Tools, Troubleshooting | Comments Off

Simple LED detector for RFID or NFC of 13MHz, without any battery

Triggered by experience with “Raspberry and RFID reader/writer, first test “, I tested a simple LED RF detector idea that can be found in “RFID detector” and “RFID Reader Detector and Tilt-Sensitive RFID Tag “. For 13Mhz RFID/NFC, the LED … Continue reading

Posted in DIY, For Fun or Interest, Gadgets, Hobbies and Other Interests, Internet of Things and M2M, Raspberry Pi, Recommended Free Tools, Tests | Comments Off

Raspberry and RFID reader/writer, first test

An RFID system is always made up of two components: the transponder, Proximity Integrated Circuit Card (PICC) the detector or reader , Proximity Coupling Device (PCD) The RFID reader/writer (13.56MHz) RF522 for arduino can be used in Raspberry. In this … Continue reading

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Car on-board diagnostics (ODB II) with android, first tests

Short version With an android phone and ODB adapter one can get access to the standardized diagnostic interface(s) of a car. I bought an ODB II bluetooth adapter to find out what information is available from a car. With a … Continue reading

Posted in Android, DIY, For Fun or Interest, Gadgets, Hobbies and Other Interests, Internet of Things and M2M, Tests, Tools | Comments Off

Raspberry Pi and physical interfaces, part 2

This blog continues from the previous blog Raspberry Pi and physical interfaces. Case: GPIO with 1 LED output and 2 inputs First the push button & LED example is modified to include also another input, a hall switch. For the … Continue reading

Posted in DIY, For Fun or Interest, Gadgets, Hobbies and Other Interests, Innovation and new tech, Internet of Things and M2M, Raspberry Pi, Tests | Comments Off

Fritzing, tool for documenting Raspberry Pi projects

Fritzing is an open source tool, which is great for documenting your Raspberry Pi projects. Their library contains several electronic parts, and if needed, one can create own components too. For advanced usage, one can even order PCBs (Printed Circuit … Continue reading

Posted in Anvanced Tools, DIY, For Fun or Interest, Hobbies and Other Interests, Innovation and new tech, Internet of Things and M2M, Raspberry Pi, Robotics, Tools | Comments Off

Raspberry Pi and physical interfaces

Raspberry Pi contains several GPIO pins, which can be used as digital input or outputs (GPIO = General-purpose input/output). For example, if GPIO4 is defined as output, then setting the output value to 1 provides 3.3V into that physical pin … Continue reading

Posted in DIY, For Fun or Interest, Gadgets, Hobbies and Other Interests, Innovation and new tech, Internet of Things and M2M, Raspberry Pi, Tests, Tips | Comments Off