Interactive Robotics Microcontroller Pinouts
Instant visual pinout maps with real-time bus function highlighting (I2C, SPI, UART, PWM, ADC, CAN bus) and electrical safety caveats for the 5 most popular robotics controllers.
ESP32 DEVKIT V1 (30-PIN)
GPIO 21
Primary Role
Default I2C Data (SDA)
Supported Functions
I2C SDA, PWM, Digital GPIO, RTC IO
Voltage & Logic Level
3.3V Logic (NOT 5V tolerant). Max current: 12mA-40mA.
Internal Pulls
Configurable internal weak pull-up (~45kΩ) & pull-down.