Raspberry Pi

Headless from Day One: Imaging a Raspberry Pi SD Card the Easy Way

Using Raspberry Pi Imager to flash Raspberry Pi OS Lite (32-bit) onto a Raspberry Pi 3 B+ SD card and pre-configure the hostname, user, Wi-Fi and SSH for a fully headless setup, before the first boot.

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One Monitor, One Time: First Boot and SSH on the Raspberry Pi

Booting a Raspberry Pi 3 B+ with a monitor exactly once: reading the kernel boot messages, logging in, finding the Pi's IP address, and connecting from the PC over SSH so the monitor never comes back.

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Talking to the Kernel: dmesg, the ACT LED, and GPIO From the Console

Reading the Raspberry Pi kernel log with dmesg, understanding kernel space vs user space, mapping the project's GPIO pins, and blinking the ACT LED and driving a GPIO pin over SSH with zero code.

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One Command to Build, Deploy and Debug: CMake Presets for the Raspberry Pi

Cross-compiling C for the Raspberry Pi on Windows with the Linaro arm-linux-gnueabihf toolchain, deploying over SSH and remote-debugging with gdbserver, all from CMakeLists.txt and CMakePresets.json with one command.

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Plug It In and It Just Runs: Starting a Raspberry Pi App on Boot with systemd

Turning an embedded C program into a systemd service on Raspberry Pi OS Lite so it starts on every boot, restarts on crash and logs to the journal, plus how to live with it while you deploy and debug.

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Is It Alive? Building a Heartbeat Thread and a Shared Data Frame on the Raspberry Pi

Writing the first pthread of a Raspberry Pi proximity alarm in embedded C: a software alive task, one shared data frame protected by a mutex, drift-free timing with clock_nanosleep, and clean shutdown with signals.

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