Tutorials and deep dives on embedded Linux, edge AI, ESP32 and the parts of hardware engineering nobody documents properly.https://bittobyteacademy.com/https://bittobyteacademy.com/blog/how-qemu-emulates-hardware-device-models-mmio-tcg/https://bittobyteacademy.com/blog/how-qemu-emulates-hardware-device-models-mmio-tcg/Every device your guest sees is C code responding to memory addresses. Once you see the trick, QEMU stops being mysterious and its performance behaviour becomes predictable.Wed, 05 Aug 2026 00:00:00 GMTQEMUKVMLinuxVirtualizationhttps://bittobyteacademy.com/blog/how-to-check-kvm-is-enabled-on-raspberry-pi-5/https://bittobyteacademy.com/blog/how-to-check-kvm-is-enabled-on-raspberry-pi-5/Three commands confirm your host can run accelerated VMs — and one of them returns nothing on a Raspberry Pi, for a reason that confuses a lot of people.Wed, 05 Aug 2026 00:00:00 GMTKVMLinuxRaspberry PiVirtualizationhttps://bittobyteacademy.com/blog/installing-the-kvm-stack-on-raspberry-pi-os/https://bittobyteacademy.com/blog/installing-the-kvm-stack-on-raspberry-pi-os/Nine packages, three layers. Then virt-host-validate reports four warnings and three failures on a healthy system — here's how to triage every line.Wed, 05 Aug 2026 00:00:00 GMTKVMlibvirtLinuxRaspberry Pihttps://bittobyteacademy.com/blog/fixing-virt-install-on-arm64/https://bittobyteacademy.com/blog/fixing-virt-install-on-arm64/Four failures stand between a correct virt-install command and a booting arm64 guest. None of them are documented well, and the error messages point away from the causes.Wed, 05 Aug 2026 00:00:00 GMTKVMlibvirtQEMURaspberry Pihttps://bittobyteacademy.com/blog/kvm-vs-qemu-vs-libvirt-who-does-what/https://bittobyteacademy.com/blog/kvm-vs-qemu-vs-libvirt-who-does-what/Three pieces, one running VM. Each exists because of a specific gap the layer below it leaves open — which is a better way to learn them than three definitions.Wed, 05 Aug 2026 00:00:00 GMTKVMQEMULinuxVirtualizationhttps://bittobyteacademy.com/blog/what-a-hypervisor-is-and-where-kvm-fits/https://bittobyteacademy.com/blog/what-a-hypervisor-is-and-where-kvm-fits/The Type-1 vs Type-2 split is the first thing every virtualization tutorial teaches, and KVM breaks it. Here's why that's interesting rather than annoying.Wed, 05 Aug 2026 00:00:00 GMTKVMLinuxVirtualizationARM64https://bittobyteacademy.com/blog/what-ioctl-kvm-run-does-the-vm-exit-loop-explained/https://bittobyteacademy.com/blog/what-ioctl-kvm-run-does-the-vm-exit-loop-explained/One system call, looped forever, is what running a virtual machine physically is. Here's what happens inside it — and why some VM exits cost far more than others.Wed, 05 Aug 2026 00:00:00 GMTKVMQEMULinuxVirtualizationhttps://bittobyteacademy.com/blog/virt-install-explained-every-flag-for-an-arm64-guest/https://bittobyteacademy.com/blog/virt-install-explained-every-flag-for-an-arm64-guest/Twelve flags look like a lot to memorize. They're answers to seven questions — and once you know the questions, you can write the command for any guest from scratch.Wed, 05 Aug 2026 00:00:00 GMTlibvirtKVMQEMURaspberry Pihttps://bittobyteacademy.com/blog/why-kvm-needs-the-cpu-el2-vhe-virtualization-extension/https://bittobyteacademy.com/blog/why-kvm-needs-the-cpu-el2-vhe-virtualization-extension/KVM is a kernel module, but virtualization is a hardware feature. Understanding how those two relate is where most people's mental model of KVM breaks.Wed, 05 Aug 2026 00:00:00 GMTKVMLinuxVirtualizationARM64https://bittobyteacademy.com/blog/why-virtio-is-faster-virtqueues-and-vhost-net-explained/https://bittobyteacademy.com/blog/why-virtio-is-faster-virtqueues-and-vhost-net-explained/Emulated devices are slow because they faithfully imitate hardware that was never designed for software. VirtIO throws that away and lets the guest cooperate instead.Wed, 05 Aug 2026 00:00:00 GMTVirtIOKVMQEMUVirtualizationhttps://bittobyteacademy.com/blog/systemd-service-management/https://bittobyteacademy.com/blog/systemd-service-management/A practical beginner's guide to writing systemd service files for embedded Linux — covering auto-start, restart policies, dependency ordering, environment variables, and production-grade logging for applications that need to run unattended in the field.Tue, 16 Dec 2025 00:00:00 GMTsystemdLinuxService ManagementEmbedded SystemsDevOpsRaspberry Pihttps://bittobyteacademy.com/blog/production-deployment-raspberry-pi/https://bittobyteacademy.com/blog/production-deployment-raspberry-pi/SD card corruption, thermal throttling, power supply quality, clock sync failures, and watchdog timers — the specific failures I ran into deploying Pis in production and exactly what fixed them.Tue, 14 Oct 2025 00:00:00 GMTRaspberry PiProductionReliabilityEmbedded LinuxHardwarehttps://bittobyteacademy.com/blog/mqtt-vs-http-iot/https://bittobyteacademy.com/blog/mqtt-vs-http-iot/A practical comparison of MQTT and HTTP for IoT — bandwidth overhead, connection persistence, power consumption, infrastructure complexity, and pub/sub fan-out, drawn from production deployments across edge sensors and robot platforms.Sun, 14 Sep 2025 00:00:00 GMTMQTTHTTPIoTProtocolsNetworkhttps://bittobyteacademy.com/blog/exponential-backoff-network-resilience/https://bittobyteacademy.com/blog/exponential-backoff-network-resilience/Why naive reconnection strategies fail at scale and how exponential backoff with proportional jitter prevents overwhelming your infrastructure — with production-ready Python and systemd patterns.Wed, 20 Aug 2025 00:00:00 GMTNetwork ProgrammingDistributed SystemsReliabilityMQTTPythonhttps://bittobyteacademy.com/blog/python-vs-cpp-embedded/https://bittobyteacademy.com/blog/python-vs-cpp-embedded/A practical comparison of Python's rapid prototyping capabilities against C++'s bare-metal performance for embedded applications — covering real-time systems, MicroPython, hybrid architectures, and a decision framework to help you choose the right tool for every layer of your project.Sat, 12 Apr 2025 00:00:00 GMTPythonC++PerformanceEmbedded SystemsLanguagesMicroPythonRTOSRaspberry Pi