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Recompiling the Kernel on the Pi Compute Module 4
I wanted to enable the RealTek RTL81111 nic on the DFRobot DFR0767 dual-nic carrier board for my pi 4 compute module. The driver for this nic does not come with piOS by default; apparently it is included with the 64bit version. To enable this driver I had to recompile the kernel. I followed the basic…
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Controlling 433 Mhz Blinds from Home Assistant (the easy way)
A while back I bought a superhet 433 Mhz transceiver/receiver pair (like this). The goal was to attach this simple device to a pi and control it using the great rpi-rf package. Unfortunately, it appears that my particular transceivers (one BY-305 controlling five blinds, one AC-123-06D controlling two blinds) emit codes that aren’t easily detected…
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Architecture For DIY AI-Driven Home Security
The raspberry pi’s ecosystem makes it a tempting platform for building computer vision projects such as home security systems. For around $80, one can assemble a pi (with sd card, camera, case, and power) that can capture video and suppress dead scenes using motion detection – typically with motion or MotionEye. This low-effort, low-cost solution…
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Installing OpenCV 4.1.1 on Raspberry Pi 4
Recently I purchased a raspberry pi 4 to see how it performs basic computer vision tasks. I largely followed this guide on building opencv https://www.learnopencv.com/install-opencv-4-on-raspberry-pi/ However, in the guide there are several missing dependencies on a fresh version of raspbian buster. There are also some apparent errors in the CMakeLists.txt file which other users already…
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WiFi Performance on Raspberry Pi 3
I purchased a couple raspberry pi 3s. The major draw is that you no longer need an external wifi adapter – yet the cost is the same as the older pis. The very first thing I noticed is that ssh traffic was stuttery. This cleared up after performing an apt-get update/upgrade. Everything seemed silky-smooth thereafter.