GPIO Pins: Your SBC's Hidden Superpower

That row of pins on your Raspberry Pi or ESP32 isn't just decoration — it's the bridge between software and the physical world. In this episode, we break down what GPIO actually does, from digital inputs and outputs to I2C, SPI, and UART protocols. We walk through Daniel's real-world LoRa parking sensor project to show how ultrasonic sensors, temperature modules, and radio transceivers all connect through these humble headers. Then we tackle the power limits that separate a working project from a fried board — including why the HC-SR04's five-volt output can kill your Pi, how the ESP32's strapping pins can prevent boot, and exactly where the three-point-three-volt regulator's current budget runs out. Whether you're building a parking sensor or just finally curious about those pins, this is your practical guide to GPIO. Episode #752066 — open it directly at myweirdprompts.com/752066