GPIO Basics on Flipper Zero — Wiring and Using Pins

GPIO Basics on Flipper Zero — Wiring and Using Pins Flipper Zero has a GPIO header on the back that lets it interface with external electronics — sensors, displays, relays, and microcontrollers. Here's how to get started. Pin Layout The Flipper GPIO header has 18 pins: Full pinout available at: docs.flipper.net/gpio-and-modules Important Limits GPIO is 3.3V logic — never connect 5V signals directly 3.3V pin: 50mA max — low current only 5V pin: Only available when USB connected Use logic level shifters for 5V devices Simple LED Control Wire an LED through a 330Ω resistor from a GPIO pin to GND. In the GPIO app: Apps → GPIO → GPIO Control Toggle the pin on/off to blink the LED. Reading a Button Wire a pushbutton between a GPIO pin and GND. Enable internal pull-up in the app. Read pin state in real time. UART Communication Flipper GPIO pins 17/18 are UART TX/RX: Apps → GPIO → UART Terminal Default 115200 baud Connect to Arduino, ESP32, or any UART device Useful for serial debugging hardware projects I2C and SPI Flipper supports I2C and SPI: I2C: SCL = PC0, SDA = PC1 SPI: Available on PA4–PA7 Community apps exist for specific sensors (BME280, SSD1306, etc.) Practical Uses Read temperature sensors and display on screen Control relay modules for automation Interface with ESP32 for Wi-Fi projects Logic analyzer (Flipper can capture pin state over time)

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