ESP32-C6: Pin mapping

[JanPetterMG]

🔧 ESP32-C6: Pin Tips & Gotchas

🎉 Feel free to share your insights, questions, or setups below!

💡 This thread is for beginners and experienced users alike. Whether you're figuring out your first build or have clever tricks to share, you're welcome to join in.

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⏰ RTC Pins

GPIO 0–3, 6, 7 can wake the ESP32-C6 from deep sleep. Useful for:

• Power button PIN_SW1
• Mode button PIN_SW2
• Interrupts like PIN_INT from a real-time clock

🎙️ Analog Input

GPIO 0–3, 6 are usable as analog inputs. For example:

• PIN_LDR for photocell signals
• PIN_MIC for microphone signals

⚠️ Avoid Strapping Pins

GPIO 4, 5, 8, 9, 15 have bootstrapping functions. Avoid connecting these to inputs that may float or pull them during boot.

📄 Reference

ESP32-C6 Datasheet (PDF)

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💬 Add your own:

• Board name
• Pinout overview
• Tips or pitfalls you encountered
• Questions or confusions you had as a beginner

Feel free to include your SPI, PWM, I2C, or other digital pin setups too—this thread is meant to cover practical pin mapping across different ESP32-C6 boards.

Let’s make this a helpful resource together!

[JanPetterMG]

Seeed Studio XIAO ESP32C6

📍 Pinout Diagram

Hardware overview

// IKEA Frekvens
#define PIN_SW1 0   // D0  SW1
#define PIN_SW2 1   // D1  SW
#define PIN_MIC 2   // D2  U3 pin 7
#define PIN_MOSI 18 // D10 DA
#define PIN_SCLK 19 // D8  CLK
#define PIN_OE 21   // D3  EN
#define PIN_CS 22   // D4  LAK

// IKEA Obegränsad
#define PIN_SW2 0   // D0  SW
#define PIN_OE 1    // D1  EN
#define PIN_CS 2    // D2  CLA
#define PIN_MOSI 18 // D10 DI
#define PIN_SCLK 19 // D8  CLK

⚡ Power Notes

• VBUS: Power input pin, supports 1.95 V to 5.5 V
• GND: Ground reference
• 3V3: Logic-level power output for peripherals (e.g. level shifters)