Comprehensive documentation for every ESP32 peripheral. From ADC and PWM to I2C, SPI, and UART.
ADC1 vs ADC2, Wi-Fi conflicts, resolution, and Arduino code examples.
16 channels, frequency/resolution trade-offs, LED fading, servo control.
Green-yellow-red categorization with beginner cheat sheet.
Boot mode, flash voltage, and UART output explained.
UART0, UART1, UART2, remapping, baud rates, flow control.
Default SDA/SCL, dual bus, remapping, troubleshooting.
VSPI and HSPI buses, dual bus operation, high-speed config.
T0–T9 touch sensors, touchRead(), wake-from-sleep, calibration.
Wake sources, RTC GPIO, ULP co-processor, battery optimization.
OV2640 camera, SD card, power, programming, troubleshooting.
Head-to-head specs comparison. Which chip should you choose?
S3 vs C3 vs S2 vs C6 vs H2 — all specs side by side.
Printable quick reference card. GPIO, ADC, strapping pins, variants.
1.8M+ pins mapped · 38 pins reference · 18 ADC channels · 16 PWM channels
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